User Guide 3Com Wireless 8760 Dual-radio 11a/b/g PoE Access Point 3CRWE876075 / WL-546 www.3Com.com Part Number 10015153 Rev.
3Com Corporation 350 Campus Drive Marlborough, MA 01752-3064 Copyright © 2006 3Com Corporation. All rights reserved. No part of this documentation may be reproduced in any form or by any means or used to make any derivative work (such as translation, transformation, or adaptation) without written permission from 3Com Corporation.
Contents 1 Introduction Product Features 1-2 Security 1-2 Performance and Reliability 1-3 Virtual Access Point (VAP) Support 1-3 WDS Bridging and Spanning Tree Protocol (STP) Support Manageability 1-4 Wireless Network Standards 1-4 802.11g 1-4 802.
3 Initial Configuration Networks with a DHCP Server 3-1 Networks without a DHCP Server 3-1 Using the 3Com Installation CD 3-2 Launch the 3COM Wireless Infrastructure Device Manager (Widman) utility 3-2 Launching the 3com Wireless Interface Device Manager 3-2 First Time Only 3-4 Using the Setup Wizard 3-4 4 System Configuration Advanced Setup 4-2 System Identification 4-4 TCP / IP Settings 4-5 RADIUS 4-8 Authentication 4-9 Filter Control 4-14 VLAN 4-16 SNMP 4-18 Configuring SNMP and Trap Message Parameter
Wi-Fi Protected Access (WPA) 5 4-56 Command Line Interface Using the Command Line Interface 5-1 Accessing the CLI 5-1 Console Connection 5-1 Telnet Connection 5-2 Entering Commands 5-3 Keywords and Arguments 5-3 Minimum Abbreviation 5-3 Command Completion 5-3 Getting Help on Commands 5-3 Showing Commands 5-4 Partial Keyword Lookup 5-4 Negating the Effect of Commands 5-5 Using Command History 5-5 Understanding Command Modes 5-5 Exec Commands 5-5 Configuration Commands 5-6 Command Line Processing 5-6 Comma
TERMINOLOGY Access Point—An internetworking device that seamlessly connects wired and wireless networks. Ad Hoc—An ad hoc wireless LAN is a group of computers, each with wireless adapters, connected as an independent wireless LAN. Backbone—The core infrastructure of a network. The portion of the network that transports information from one central location to another central location where it is unloaded onto a local system.
VAP—Virtual Access Point. An access point radio capable of operating as four separate access points. VLAN—Virtual Local Area Network. A LAN consisting of groups of hosts that are on physically different segments but that communicate as though they were on the same segment. WEP—Wired Equivalent Privacy is based on the use of security keys and the popular RC4 encryption algorithm. Wireless devices without a valid WEP key will be excluded from network traffic. WDS—Wireless Distribution System.
1 INTRODUCTION The 3Com® Wireless 8760 Dual-radio 11a/b/g PoE Access Point offers a dual-mode architecture that supports 802.11g, 802.11a, and 802.11b wireless users on a single device. This means you can mix and match radio bands to meet different coverage and bandwidth needs within the same area. With their flexibility and unfettered access, wireless LANs are changing the way people work.
CHAPTER 1: INTRODUCTION PRODUCT FEATURES Access Point 8760—Creates an enterprise-class wireless LAN supporting up to 256 simultaneous users. The access point supports two radios and external antennas including WDS bridging ability on both radios. SECURITY 3Com offers one of the most robust suite of standards-based security on the market today. To protect sensitive data broadcast over the wireless LAN, 3Com supports WPA and WPA2 security standards.
Product Features PERFORMANCE AND RELIABILITY 3Com wireless access point performance features ensure reliable and seamless connections for users wherever they roam: Automatic channel selection automatically finds the least loaded channel for interference-free communication. Auto network connect and dynamic rate shifting keep users connected through a wide variety of conditions by changing to the optimum connection speed as they move through the network.
CHAPTER 1: INTRODUCTION MANAGEABILITY 3Com offers a wide range of standards-based management support, from SNMP to 3Com Network Supervisor and HP OpenView for seamless integration with your wired network. Wireless Infrastructure Device Manager lets you configure parameters, run diagnostics, backup and restore configurations, and monitor performance from anywhere on the network using an embedded web server browser.
Wireless Network Standards 802.11A 802.11a operates at the 5 GHz band and supports data rates at up to 54 Mbps. For those organizations demanding even higher speeds, a “turbo mode” feature can boost throughput rates up to 108 Mbps. And because there are fewer devices in the 5 GHz band, there’s less potential for RF interference. However, because it is at an entirely different radio spectrum, it is not compatible with 802.11g.
CHAPTER 1: INTRODUCTION 1-6
2 INSTALLING THE ACCESS POINT This equipment must be installed in compliance with local and national building codes, regulatory restrictions, and FCC rules. For the safety of people and equipment, this product must be installed by a professional technician/installer. ! CAUTION: Before installing, see the important warnings and cautions in “Safety Information” on page 2-2. INSTALLATION REQUIREMENTS The following items are required for installation: Access Point 8760.
CHAPTER 2: INSTALLING THE ACCESS POINT To access and use the Web configuration management system, you need a computer that is running Internet Explorer 5.0 or newer and one of the following operating systems: Windows 2000, or Windows XP. It is recommended that this computer become the dedicated workstation for managing and configuring the access point and the wireless network. POWER REQUIREMENTS The access point complies with the IEEE 802.3af power-over-Ethernet standard.
Deciding Where to Place Equipment and Performing A Site Survey ! CAUTION: The 3Com power supply input relies on a 16A rated building fuse or circuit protector for short circuit protection of the line to neutral conductors. ! CAUTION: It is the responsibility of the installer to ensure that the Power-over-Ethernet (POE) power supply is properly connected.
CHAPTER 2: INSTALLING THE ACCESS POINT Configuring a wireless LAN can be as easy as placing a 3Com Wireless Access Point in a central area and making the necessary connections to the AP and the clients. However, installing multiple Access Points may require more planning.
Connecting the Standard Antennas Figure 1 Front and Rear Panel Description Kensington Lock Slot LEDs POE Port Console Port CONNECTING THE STANDARD ANTENNAS The Access Point 8760 is supplied with standard detachable antennas. These should be attached before the access point is installed. If using an alternate antenna, see “Selecting and Connecting a Different Antenna Model” on page 2-12. 1 ! Carefully unpack the standard detachable antennas.
CHAPTER 2: INSTALLING THE ACCESS POINT Figure 2 Antenna Adjustment Depending on the coverage required for your site, you may want to replace the standard detachable antennas with one of the external antennas available for use with the access point. See “Selecting and Connecting a Different Antenna Model” on page 2-12. CONNECTING POWER It is advisable to connect the power and check the Ethernet cables and LEDs before installing the unit in a hard-to-reach location.
Connecting Power If you supply your own Ethernet cable for connecting power, be sure that it is standard category 5 straight-through (8-wire) cable that has not been altered in any way. Use of nonstandard cable could damage the access point.
CHAPTER 2: INSTALLING THE ACCESS POINT USING THE POWER SUPPLY ! CAUTION: To avoid damaging network equipment, make sure that the cables are connected from access point to power supply to LAN as shown above and described below. The power supply can be located at any point between the access point and the LAN access port, wherever a convenient power outlet exists.
Checking the LEDs CHECKING THE LEDS When power is connected, the access point LEDs light. The illustration and the following table describe the LEDs and their functions. Table 1 System LEDs LED Power Link 11a 11g Color Indicates Green The access point is powered up and operating normally. Off The access point is not receiving power or there is a fault with the power supply. Green The access point has a 10/100 Mbps Fast Ethernet connection.
CHAPTER 2: INSTALLING THE ACCESS POINT WALL, CEILING, OR ELECTRICAL BOX MOUNTING To mount the access point to a wall, ceiling, or electrical box: 1 Remove the access point from the mounting bracket. 2 Screw the mounting bracket to a wall, ceiling, or electrical box (NEMA enclosure): If mounting to a solid surface wall or ceiling, use two of the sheet metal screws and two of the wall anchors (included). If mounting to drywall, use two sheet metal screws and two wall anchors (not included).
Wall, Ceiling, or Electrical Box Mounting Figure 4 Routing a Cable Routing a cable Figure 5 Mounting Bracket Installing the mounting bracket 4 Connect the Ethernet cable to the port on the back of the access point.
CHAPTER 2: INSTALLING THE ACCESS POINT FLAT SURFACE INSTALLATION The access point can also be placed on a flat surface such as a table, desktop or filing cabinet. Do not install the access point on any type of metal surface. If you choose a flat surface mount, select a location that is clear of obstructions and provides good reception. Figure 6 Flat Surface Installation NOTE: Regulatory restrictions dictate that when this device is operational, the minimal body-to-antenna distance is 20 cm (8 inches).
Selecting and Connecting a Different Antenna Model Figure 7 Connecting Antennae Side Side 1 Position the antenna so that there are minimal obstacles between it and any client with which it will communicate. While maintaining a direct line of sight between the antenna and a client is not strictly necessary, such an arrangement helps to ensure a strong signal. Ensure that access is available for routing the antenna cable from the antenna to the access point.
CHAPTER 2: INSTALLING THE ACCESS POINT INSTALLING SOFTWARE UTILITIES The installation CD includes documentation and software utilities to help you set up and administer the wireless components of your network. To view product documentation, select View the Documentation from the CD Startup Menu and then select the item you want to view. The software Tools and Utilities include: 3Com Wireless Infrastructure Device Manager.
3 INITIAL CONFIGURATION The Access Point 8760 offers a variety of management options, including a web-based interface. The initial configuration steps can be made through the web browser interface. The access point requests an IP address via DHCP by default. If no response is received from the DHCP server, then the access point uses the default address 169.254.2.1.
CHAPTER 3: INITIAL CONFIGURATION 1 Connect a computer directly to the Access Point using the supplied standard Category 5 UTP Ethernet cable. 2 Enter the Access Point’s default IP address (169.254.2.1) into the computer’s web browser. If the Configuration Management System starts, the Access Point is using the factory assigned IP address.
Figure 8 Wireless Interface Device Manager Click on the Properties button to see the following screen Figure 9 Wireless Interface Device Manager - Properties 3-3
CHAPTER 3: INITIAL CONFIGURATION Directly connect to the device through its Ethernet port or console port. Follow the instructions below to login into the AP Configuration screen: 1 Load a web browser and enter . 2 The Logon screen appears. To log on to the Web interface: 1 Username, type admin (case sensitive). 2 Password, type password 3 Click Log On. FIRST TIME ONLY When you log in for the first time, you may be asked to select your country.
Using the Setup Wizard NOTE: If you changed the default IP address via the command line interface above, use that address instead of the one shown here. Logging In – Enter the username “admin,” and password “password,” then click LOGIN. For information on configuring a user name and password, see page 4-22.
CHAPTER 3: INITIAL CONFIGURATION The home page displays the Main Menu. Figure 11 Home Page Launching the Setup Wizard – To perform initial configuration, click Setup Wizard on the home page, select the VAP you wish to configure, then click on the [Next] button to start the process.
Using the Setup Wizard 1 Service Set ID – Enter the service set identifier in the SSID box which all wireless clients must use to associate with the access point. The SSID is case sensitive and can consist of up to 32 alphanumeric characters. Figure 13 Setup Wizard - Step 1 2 Radio Channel – You must enable radio communications for 802.11a and 802.11b/g, and set the operating radio channel.
CHAPTER 3: INITIAL CONFIGURATION Figure 14 Setup Wizard - Step 2 802.11a Turbo Mode – If you select Enable, the access point will operate in turbo mode with a data rate of up to 108 Mbps. Normal mode support 13 channels, Turbo mode supports only 5 channels. (Default: Disabled) 802.11a Radio Channel – Set the operating radio channel number. (Default: 60ch, 5.300 GHz when Auto Channel Select is not enabled.) Auto Channel Select – Select Enable for automatic radio channel detection.
Using the Setup Wizard 3 IP Configuration – Either enable or disable Dynamic Host Configuration Protocol (DHCP) for automatic IP configuration. If you disable DHCP, then manually enter the IP address and subnet mask. If a management station exists on another network segment, then you must enter the IP address for a gateway that can route traffic between these segments.
CHAPTER 3: INITIAL CONFIGURATION Figure 16 Setup Wizard - Step 4 Authentication Type – Use “Open System” to allow open access to all wireless clients without performing authentication, or “Shared Key” to perform authentication based on a shared key that has been distributed to all stations. (Default: Open System) WEP – Wired Equivalent Privacy is used to encrypt transmissions passing between wireless clients and the access point.
Using the Setup Wizard 5 Click Finish. 6 Click the OK button to complete the wizard.
CHAPTER 3: INITIAL CONFIGURATION 3-12
4 SYSTEM CONFIGURATION Before continuing with advanced configuration, first complete the initial configuration steps described in Chapter 4 to set up an IP address for the access point. The access point can be managed by any computer using a web browser (such as Internet Explorer 5.0 or above). Enter the configured IP address of the access point, or use the default address: http://169.254.2.1. To log into the access point, enter the default user name “admin” and the password “password,” then press “LOGIN.
CHAPTER 4: SYSTEM CONFIGURATION Figure 18 Advanced Setup The information in this chapter is organized to reflect the structure of the web screens for easy reference. However, it is recommended that you configure a user name and password as the first step under Administration to control management access to this device (page 4-22). ADVANCED SETUP The Advanced Setup pages include the following options.
Advanced Setup Menu Description Page SNMP Configures SNMP settings 4-18 Administration Configures user name and password for management access; upgrades software from local file, FTP or TFTP server; resets configuration settings to factory defaults; and resets the access point 4-22 WDS/STP Settings Configures WDS bridging and Spanning Tree Protocol features 4-27 Syslog Set-up Controls logging of error messages; sets the system clock via SNTP server or manual configuration 4-33 Status Displa
CHAPTER 4: SYSTEM CONFIGURATION SYSTEM IDENTIFICATION The system name for the access point can be left at its default setting. However, modifying this parameter can help you to more easily distinguish different devices in your network. Figure 19 System Identification System Name – An alias for the access point, enabling the device to be uniquely identified on the network.
TCP / IP Settings TCP / IP SETTINGS Configuring the access point with an IP address expands your ability to manage the access point. A number of access point features depend on IP addressing to operate. NOTE: You can use the web browser interface to access IP addressing only if the access point already has an IP address that is reachable through your network. By default, the access point will be automatically configured with IP settings from a Dynamic Host Configuration Protocol (DHCP) server.
CHAPTER 4: SYSTEM CONFIGURATION DHCP Client (Enable) – Select this option to obtain the IP settings for the access point from a DHCP (Dynamic Host Configuration Protocol) server. The IP address, subnet mask, default gateway, and Domain Name Server (DNS) address are dynamically assigned to the access point by the network DHCP server. (Default: Enabled) DHCP Client (Disable) – Select this option to manually configure a static address for the access point.
TCP / IP Settings Figure 21 Smart Monitor By enabling Smart Monitor (known as Link Integrity in the CLI) and setting a target IP address, the AP will periodically (set by the ping interval) check to see if the target address responds to pings. If it fails to respond to a ping after the configured number of retries, it will disable both radios so that no clients can connect to the AP.
CHAPTER 4: SYSTEM CONFIGURATION RADIUS Remote Authentication Dial-in User Service (RADIUS) is an authentication protocol that uses software running on a central server to control access to RADIUS-aware devices on the network. An authentication server contains a database of user credentials for each user that requires access to the network. A primary RADIUS server must be specified for the access point to implement IEEE 802.1X network access control and Wi-Fi Protected Access (WPA) wireless security.
Authentication Port: The UDP port number used by the RADIUS server for authentication messages. (Range: 1024-65535; Default: 1812) Key: A shared text string used to encrypt messages between the access point and the RADIUS server. Be sure that the same text string is specified on the RADIUS server. Do not use blank spaces in the string. (Maximum length: 255 characters) Timeout: Number of seconds the access point waits for a reply from the RADIUS server before resending a request.
CHAPTER 4: SYSTEM CONFIGURATION use both MAC address and 802.1X authentication, with client station MAC authentication occurring prior to IEEE 802.1X authentication. However, it is better to choose one or the other, as appropriate. IEEE 802.1X is a standard framework for network access control that uses a central RADIUS server for user authentication. This control feature prevents unauthorized access to the network by requiring an 802.1X client application to submit user credentials for authentication.
Authentication Figure 23 Authentication MAC Authentication – You can configure a list of the MAC addresses for wireless clients that are authorized to access the network. This provides a basic level of authentication for wireless clients attempting to gain access to the network. A database of authorized MAC addresses can be stored locally on the access point or remotely on a central RADIUS server. (Default: Disabled) Disabled: No checks are performed on an associating station’s MAC address.
CHAPTER 4: SYSTEM CONFIGURATION Local MAC: The MAC address of the associating station is compared against the local database stored on the access point. Use the Local MAC Authentication section of this web page to set up the local database, and configure all access points in the wireless network service area with the same MAC address database. RADIUS MAC: The MAC address of the associating station is sent to a configured RADIUS server for authentication.
Authentication When 802.1X is enabled, the broadcast and session key rotation intervals can also be configured. Broadcast Key Refresh Rate: Sets the interval at which the broadcast keys are refreshed for stations using 802.1X dynamic keying. (Range: 0-1440 minutes; Default: 0 means disabled) Session Key Refresh Rate: The interval at which the access point refreshes unicast session keys for associated clients. (Range: 0-1440 minutes; Default: 0 means disabled) 802.
CHAPTER 4: SYSTEM CONFIGURATION FILTER CONTROL The access point can employ network traffic frame filtering to control access to network resources and increase security. You can prevent communications between wireless clients and prevent access point management from wireless clients. Also, you can block specific Ethernet traffic from being forwarded by the access point.
Filter Control AP Management Filter – Controls management access to the access point from wireless clients. Management interfaces include the web, Telnet, or SNMP. (Default: Disabled) Disabled: Allows management access from wireless clients. Enabled: Blocks management access from wireless clients. Uplink Port MAC Address Filtering Status – Prevents traffic with specified source MAC addresses from being forwarded to wireless clients through the access point.
CHAPTER 4: SYSTEM CONFIGURATION VLAN The access point can employ VLAN tagging support to control access to network resources and increase security. VLANs separate traffic passing between the access point, associated clients, and the wired network. There can be a VLAN assigned to each associated client, a default VLAN for each VAP (Virtual Access Point) interface, and a management VLAN for the access point.
Filter Control A VLAN ID (1-4094) can be assigned to a client after successful IEEE 802.1X authentication. The client VLAN IDs must be configured on the RADIUS server for each user authorized to access the network. If a client does not have a configured VLAN ID on the RADIUS server, the access point assigns the client to the configured default VLAN ID for the VAP interface. NOTE: When using IEEE 802.1X to dynamically assign VLAN IDs, the access point must have 802.
CHAPTER 4: SYSTEM CONFIGURATION SNMP Simple Network Management Protocol (SNMP) is a communication protocol designed specifically for managing devices on a network. Equipment commonly managed with SNMP includes switches, routers and host computers. SNMP is typically used to configure these devices for proper operation in a network environment, as well as to monitor them to evaluate performance or detect potential problems.
SNMP Figure 26 SNMP SNMP – Enables or disables SNMP management access and also enables the access point to send SNMP traps (notifications). (Default: Disable) Location – A text string that describes the system location. (Maximum length: 255 characters) Contact – A text string that describes the system contact. (Maximum length: 255 characters) Community Name (Read Only) – Defines the SNMP community access string that has read-only access.
CHAPTER 4: SYSTEM CONFIGURATION Trap Destination Community Name – The community string sent with the notification operation. (Maximum length: 23 characters, case sensitive; Default: public) Engine ID – Sets the engine identifier for the SNMPv3 agent that resides on the access point. This engine protects against message replay, delay, and redirection. The engine ID is also used in combination with user passwords to generate the security keys for authenticating and encrypting SNMPv3 packets.
SNMP dot11InterfaceAFail - The 802.11a or 802.11g interface has failed. dot1xMacAddrAuthSuccess - A client station has successfully authenticated its MAC address with the RADIUS server. dot1xMacAddrAuthFail - A client station has failed MAC address authentication with the RADIUS server. dot1xAuthNotInitiated - A client station did not initiate 802.1X authentication. dot1xAuthSuccess - A 802.1X client station has been successfully authenticated by the RADIUS server.
CHAPTER 4: SYSTEM CONFIGURATION Passphrase – The password or key associated with the authentication and privacy settings. A minimum of eight plain text characters is required. Action – Click the Add button to add a new user to the list. Click the edit button to change details of an existing user. Click the Del button to remove a user from the list. NOTE: Users must be assigned to groups that have the same security levels.
Administration Figure 29 Administration Username – The name of the user. The default name is “admin.” (Length: 3-16 characters, case sensitive) New Password – The password for management access. (Length: 3-16 characters, case sensitive) Confirm New Password – Enter the password again for verification. TELNET AND SSH SETTINGS Telnet is a remote management tool that can be used to configure the access point from anywhere in the network. However, Telnet is not secure from hostile attacks.
CHAPTER 4: SYSTEM CONFIGURATION Telnet Server: Enables or disables the Telnet server. (Default: Disabled) SSH Server: Enables or disables the SSH server. (Default: Enabled) SSH Port Number: Sets the UDP port for the SSH server. (Range: 1-65535; Default: 22) UPGRADING FIRMWARE You can upgrade new access point software from a local file on the management workstation, or from an TFTP server. New software may be provided periodically from your distributor.
Administration Figure 31 Firmware Upgrade Before upgrading new software, verify that the access point is connected to the network and has been configured with a compatible IP address and subnet mask. If you need to download from an FTP or TFTP server, take the following additional steps: Obtain the IP address of the FTP or TFTP server where the access point software is stored.
CHAPTER 4: SYSTEM CONFIGURATION If upgrading from an FTP server, be sure that you have an account configured on the server with a user name and password. If VLANs are configured on the access point, determine the VLAN ID with which the FTP or TFTP server is associated, and then configure the management station, or the network port to which it is attached, with the same VLAN ID.
WDS and Spanning Tree Settings NOTE: If you have upgraded system software, then you must reboot the access point to implement the new operation code. New software that is incompatible with the current configuration automatically restores the access point to default values when first activated after a reboot. WDS AND SPANNING TREE SETTINGS Each access point radio interface can be configured to operate in a bridge or repeater mode, which allows it to forward traffic directly to other access point units.
CHAPTER 4: SYSTEM CONFIGURATION Figure 32 WDS and Spanning Tree Settings 4-28
WDS and Spanning Tree Settings WDS Bridge – Up to six WDS bridge or repeater links (MAC addresses) per radio interface can be specified for each unit in the wireless bridge network. One unit only must be configured as the “root bridge” in the wireless network. The root bridge is the unit connected to the main core of the wired LAN. Other bridges need to specify one “Parent” link to the root bridge or to a bridge connected to the root bridge.
CHAPTER 4: SYSTEM CONFIGURATION Figure 33 Spanning Tree Protocol Spanning Tree Protocol – STP uses a distributed algorithm to select a bridging device (STP-compliant switch, bridge or router) that serves as the root of the spanning tree network.
WDS and Spanning Tree Settings from that device to the root device. Then it selects a designated bridging device from each LAN which incurs the lowest path cost when forwarding a packet from that LAN to the root device. All ports connected to designated bridging devices are assigned as designated ports. After determining the lowest cost spanning tree, it enables all root ports and designated ports, and disables all other ports.
CHAPTER 4: SYSTEM CONFIGURATION Bridge Forwarding Delay – The maximum time (in seconds) this device waits before changing states (i.e., discarding to learning to forwarding). This delay is required because every device must receive information about topology changes before it starts to forward frames. In addition, each port needs time to listen for conflicting information that would make it return to a discarding state; otherwise, temporary data loops might result.
System Log SYSTEM LOG The access point can be configured to send event and error messages to a System Log Server. The system clock can also be synchronized with a time server, so that all the messages sent to the Syslog server are stamped with the correct time and date. Figure 34 System Log ENABLING SYSTEM LOGGING The access point supports a logging process that can control error messages saved to memory or sent to a Syslog server.
CHAPTER 4: SYSTEM CONFIGURATION Enter Time Zone – Sets the desired time zone + or - GMT. Enable Daylight Saving – Adjusts the clock for summertime and wintertime. The system allows you to limit the messages that are logged by specifying a minimum severity level. The following table lists the error message levels from the most severe (Emergency) to least severe (Debug). The message levels that are logged include the specified minimum level up to the Emergency level.
Radio Interface Secondary Server: The IP address of a secondary SNTP or NTP time server. The access point first attempts to update the time from the primary server; if this fails it attempts an update from the secondary server. NOTE: The access point also allows you to disable SNTP and set the system clock manually. Set Time Zone – SNTP uses Coordinated Universal Time (or UTC, formerly Greenwich Mean Time, or GMT) based on the time at the Earth’s prime meridian, zero degrees longitude.
CHAPTER 4: SYSTEM CONFIGURATION NOTE: The 8760 Access Point ships from the factory enabled only for channels allowed in the US/Canada. If you live in an area where additional channels are allowed, go to the 3Com web site (http://www.3com.com) and download the latest software that will allow additional channels in your country. 802.11A INTERFACE The IEEE 802.11a interface operates within the 5 GHz band, at up to 54 Mbps in normal mode or up to 108 Mbps in Turbo mode.
Radio Interface SSID – The name of the basic service set provided by a VAP interface. Clients that want to connect to the network through the access point must set their SSID to the same as that of an access point VAP interface. (Default: 3Com1 to 3Com4 for 802.11a, 3Com5 to 3Com8 for 802.11b/g; Range: 1-32 characters) Default VLAN ID – The VLAN ID assigned to wireless clients associated to the VAP interface that are not assigned to a specific VLAN by RADIUS server configuration.
CHAPTER 4: SYSTEM CONFIGURATION CONFIGURING COMMON RADIO SETTINGS To configure common radio settings, select the Radio Settings page, and scroll down to below the VAP radio settings. Figure 36 Radio Settings A Country Code – The current country code setting. This setting restricts operation of the access point to radio channels and transmit power levels permitted for wireless networks in the specified country. Description – Adds a comment or description to the wireless interface.
Radio Interface NOTE: In normal mode, the access point provides a channel bandwidth of 20 MHz, and supports the maximum number of channels permitted by local regulations (e.g., 13 channels for the United States). In Turbo Mode, the channel bandwidth is increased to 40 MHz to support the increased data rate. However, this reduces the number of channels supported (e.g., 5 channels for the United States). NOTE: .Check your country’s regulations to see if Turbo Mode is allowed.
CHAPTER 4: SYSTEM CONFIGURATION NOTE: The Antenna ID must be selected in conjunction with the Output Antenna to configure proper use of any of the antenna options. Output Antenna – Selects the use of both fixed antennas operating in diversity mode or a single antenna. (Default: Diversity) Both: The radio uses both antennas in a diversity system. Select this method when the Antenna ID is set to “3Com Integrated Antenna” to use the access point's integrated antennas.
Radio Interface Delivery Traffic Indication Message (DTIM) – The rate at which stations in sleep mode must wake up to receive broadcast/multicast transmissions. The DTIM interval indicates how often the MAC layer forwards broadcast/multicast traffic, which is necessary to wake up stations that are using Power Save mode. The default value of 1 indicates that the access point will save all broadcast/multicast frames for the Basic Service Set (BSS) and forward them after every beacon.
CHAPTER 4: SYSTEM CONFIGURATION 802.11B/G INTERFACE The IEEE 802.11g standard operates within the 2.4 GHz band at up to 54 Mbps. Also note that because the IEEE 802.11g standard is an extension of the IEEE 802.11b standard, it allows clients with 802.11b wireless network cards to associate to an 802.11g access point. First configure the radio settings that apply to the individual VAPs (Virtual Access Point) and the common radio settings that apply to all of the 802.11g interfaces.
Radio Interface Figure 37 Radio Settings B/G Client Access Mode – Selects the operating mode for the 802.11g wireless interface. (Default: 802.11b+g) 802.11b+g: Both 802.11b and 802.11g clients can communicate with the access point (up to 54 Mbps). 802.11b only: Both 802.11b and 802.11g clients can communicate with the access point, but 802.11g clients can only transfer data at 802.11b standard rates (up to 11 Mbps). 802.11g only: Only 802.
CHAPTER 4: SYSTEM CONFIGURATION Super Mode – The Atheros proprietary Super G performance enhancements are supported by the access point. These enhancements include bursting, compression, fast frames and dynamic turbo. Maximum throughput ranges between 40 to 60 Mbps for connections to Atheros-compatible clients. (Default: Disabled) Radio Channel – The radio channel that the access point uses to communicate with wireless clients.
Radio Interface The access point implements QoS using the Wi-Fi Multimedia (WMM) standard. Using WMM, the access point is able to prioritize traffic and optimize performance when multiple applications compete for wireless network bandwidth at the same time. WMM employs techniques that are a subset of the developing IEEE 802.11e QoS standard and it enables the access point to inter operate with both WMMenabled clients and other devices that may lack any WMM functionality.
CHAPTER 4: SYSTEM CONFIGURATION resolution mechanism first selects data with the highest priority to be granted a transmit opportunity. Then the same collision resolution mechanism is used externally to determine which device has access to the wireless medium.
Radio Interface Figure 39 WMM Configuration WMM – Sets the WMM operational mode on the access point. When enabled, the parameters for each AC queue will be employed on the access point and QoS capabilities are advertised to WMM-enabled clients. (Default: Support) Disable: WMM is disabled. Support: WMM will be used for any associated device that supports this feature. Devices that do not support this feature may still associate with the access point.
CHAPTER 4: SYSTEM CONFIGURATION initial wait time is a random value between zero and the CWMin value. Specify the CWMin value in the range 0-15 microseconds. Note that the CWMin value must be equal or less than the CWMax value. logCWMax (Maximum Contention Window) – The maximum upper limit of the random backoff wait time before wireless medium access can be attempted. The contention window is doubled after each detected collision up to the CWMax value.
Security SECURITY The access point is configured by default as an “open system,” which broadcasts a beacon signal including the configured SSID. Wireless clients with an SSID setting of “any” can read the SSID from the beacon and automatically set their SSID to allow immediate connection to the nearest access point. To improve wireless network security, you have to implement two main functions: Authentication: It must be verified that clients attempting to connect to the network are authorized users.
CHAPTER 4: SYSTEM CONFIGURATION Security Mechanism Client Support Implementation Considerations WPA over 802.1X Requires WPA-enabled system Mode and network card driver (native support provided in Windows XP) • Provides robust security in WPA-only mode (i.e., WPA clients only) • Offers support for legacy WEP clients, but with increased security risk (i.e., WEP authentication keys disabled) • Requires configured RADIUS server • 802.
Security Client Security Combination Configuration Summarya MAC Authenticationb RADIUS Server Dynamic WEP (802.1x) only Authentication: Open System Local, RADIUS, or Encryption: Enable Disabled 802.1x: Required Set 802.1x key refresh and reauthentication rates Yesc 802.1x WPA only Authentication: WPA Local only Encryption: Enable WPA Configuration: Required Cipher Suite: TKIP 802.1x: Required Set 802.
CHAPTER 4: SYSTEM CONFIGURATION Client Security Combination 802.1x WPA-WPA2 Mixed Mode Configuration Summarya MAC Authenticationb Authentication: WPA-WPA2-mixed Local or Disabled Encryption: Enable WPA Configuration: Required Cipher Suite: TKIP 802.1x: Required Set 802.1x key refresh and reauthentication rates WPA-WPA2 Mixed Authentication: WPA-WPA2-PSK-mixed Mode Pre-Shared Key Encryption: Enable WPA Configuration: Required Cipher Suite: TKIP 802.
Security Note that all clients share the same keys, which are used for user authentication and data encryption. Up to four keys can be specified. These four keys are used for all VAP interfaces on the same radio. To set up WEP shared keys, click Radio Settings under 802.11a or 802.11b/g, then select Authentication ‘Shared’. To use all other than WEP shared keys, select Authentication ‘Open.’ The following example presumes that you have selected to opt for other methods of encryption than WEP.
CHAPTER 4: SYSTEM CONFIGURATION Encryption – Enable or disable the access point to use data encryption (WEP, TKIP, or AES). If this option is selected when using static WEP keys, you must configure at least one key on the access point and all clients. (Default: Disabled) NOTE: You must enable data encryption through the web or CLI in order to enable all types of encryption (WEP, TKIP, or AES) in the access point.
Security Alphanumeric: Enter keys as 5 alphanumeric characters for 64 bit keys, 13 alphanumeric characters for 128 bit keys, or 16 alphanumeric characters for 152 bit keys (802.11a radio only). Key – Selects the key number to use for encryption for each VAP interface. If the clients have all four keys configured to the same values, you can change the encryption key to any of the four settings without having to update the client keys.
CHAPTER 4: SYSTEM CONFIGURATION • Hexadecimal: Enter keys as 10 hexadecimal digits (0-9 and A-F) for 64 bit keys, 26 hexadecimal digits for 128 bit keys, or 32 hexadecimal digits for 152 bit keys (802.11a radio only). This is the default setting. • Alphanumeric: Enter keys as 5 alphanumeric characters for 64 bit keys, 13 alphanumeric characters for 128 bit keys, or 16 alphanumeric characters for 152 bit keys (802.11a radio only). Key – Selects the key number to use for encryption for each VAP interface.
Security Temporal Key Integrity Protocol (TKIP): WPA specifies TKIP as the data encryption method to replace WEP. TKIP avoids the problems of WEP static keys by dynamically changing data encryption keys. Basically, TKIP starts with a master (temporal) key for each user session and then mathematically generates other keys to encrypt each data packet.
CHAPTER 4: SYSTEM CONFIGURATION for WPA2. However, the computational intensive operations of AES-CCMP requires hardware support on client devices. Therefore to implement WPA2 in the network, wireless clients must be upgraded to WPA2-compliant hardware. WPA2 Mixed-Mode: WPA2 defines a transitional mode of operation for networks moving from WPA security to WPA2. WPA2 Mixed Mode allows both WPA and WPA2 clients to associate to a common SSID interface.
Security Status Information The Status page includes information on the following items: Access Point Status The AP Status window displays basic system configuration settings, as well as the settings for the wireless interface. Figure 43 AP Status AP System Configuration – The AP System Configuration table displays the basic system configuration settings: System Up Time: Length of time the management agent has been up. MAC Address: The physical layer address for the Ethernet port.
CHAPTER 4: SYSTEM CONFIGURATION HTTP Server: Shows if management access via HTTP is enabled. HTTP Server Port: Shows the TCP port used by the HTTP interface. Version: Shows the software version number. 802.1X: Shows if IEEE 802.1X access control for wireless clients is enabled. AP Wireless Configuration – The AP Wireless Configuration tables display the radio and VAP interface settings listed below. Note that Interface Wireless A refers to the 802.11a radio and Interface Wireless G refers the 802.
Security system” and “shared key.” Open-system authentication accepts any client attempting to connect to the access point without verifying its identity. The shared-key approach uses Wired Equivalent Privacy (WEP) to verify client identity by distributing a shared key to stations before attempting authentication. Associated: Shows if the station has been successfully associated with the access point.
CHAPTER 4: SYSTEM CONFIGURATION Error Messages – An example of a logged error message is: “Station Failed to authenticate (unsupported algorithm).” This message may be caused by any of the following conditions: Access point was set to “Open Authentication”, but a client sent an authentication request frame with a “Shared key.” Access point was set to “Shared Key Authentication,” but a client sent an authentication frame for “Open System.
5 COMMAND LINE INTERFACE USING THE COMMAND LINE INTERFACE ACCESSING THE CLI When accessing the management interface for the over a direct connection to the console port, or via a Telnet connection, the access point can be managed by entering command keywords and parameters at the prompt. Using the access point’s command-line interface (CLI) is very similar to entering commands on a UNIX system. CONSOLE CONNECTION To access the access point through the console port, perform these steps: 1.
CHAPTER 5: COMMAND LINE INTERFACE Telnet Connection Telnet operates over the IP transport protocol. In this environment, your management station and any network device you want to manage over the network must have a valid IP address. Valid IP addresses consist of four numbers, 0 to 255, separated by periods. Each address consists of a network portion and host portion. For example, if the access point cannot acquire an IP address from a DHCP server, the default IP address used by the access point, 168.254.
Using the Command Line Interface ENTERING COMMANDS This section describes how to enter CLI commands. Keywords and Arguments A CLI command is a series of keywords and arguments. Keywords identify a command, and arguments specify configuration parameters. For example, in the command “show interfaces ethernet,” show and interfaces are keywords, and ethernet is an argument that specifies the interface type. You can enter commands as follows: • To enter a simple command, enter the command keyword.
CHAPTER 5: COMMAND LINE INTERFACE Showing Commands If you enter a “?” at the command prompt, the system will display the first level of keywords for the current configuration mode (Exec, Global Configuration, or Interface). You can also display a list of valid keywords for a specific command. For example, the command “show ?” displays a list of possible show commands: Enterprise AP#show ? APmanagement Show management AP information.
Using the Command Line Interface Negating the Effect of Commands For many configuration commands you can enter the prefix keyword “no” to cancel the effect of a command or reset the configuration to the default value. For example, the logging command will log system messages to a host server. To disable logging, specify the no logging command. This guide describes the negation effect for all applicable commands. Using Command History The CLI maintains a history of commands that have been entered.
CHAPTER 5: COMMAND LINE INTERFACE Configuration Commands Configuration commands are used to modify access point settings. These commands modify the running configuration and are saved in memory. The configuration commands are organized into four different modes: • Global Configuration (GC) - These commands modify the system level configuration, and include commands such as username and password.
Using the Command Line Interface Table 9 Keystroke Commands Keystroke Function Ctrl-A Shifts cursor to start of command line. Ctrl-B Shifts cursor to the left one character. Ctrl-C Terminates a task and displays the command prompt. Ctrl-E Shifts cursor to end of command line. Ctrl-F Shifts cursor to the right one character. Ctrl-K Deletes from cursor to the end of the command line. Ctrl-L Repeats current command line on a new line. Ctrl-N Enters the next command line in the history buffer.
CHAPTER 5: COMMAND LINE INTERFACE Command Group Description Page WDS Bridge Configures WDS forwarding table settings 5-84 Spanning Tree Configures spanning tree parameters 5-91 Ethernet Interface Configures connection parameters for the Ethernet interface 5-97 Wireless Interface Configures radio interface settings 5-103 Wireless Security Configures radio interface security and encryption settings 5-125 Rogue AP Detection Configures settings for the detection of rogue access points in the
Using the Command Line Interface Default Setting None Command Mode Exec Example Enterprise AP#configure Enterprise AP(config)# Related Commands end (5-9) end This command returns to the previous configuration mode.
CHAPTER 5: COMMAND LINE INTERFACE exit This command returns to the Exec mode or exits the configuration program. Default Setting None Command Mode Any Example This example shows how to return to the Exec mode from the Interface Configuration mode, and then quit the CLI session: Enterprise AP(if-ethernet)#exit Enterprise AP#exit CLI session with the Access Point is now closed Username: ping This command sends ICMP echo request packets to another node on the network.
Using the Command Line Interface - Destination unreachable - The gateway for this destination indicates that the destination is unreachable. - Network or host unreachable - The gateway found no corresponding entry in the route table. • Press to stop pinging. Example Enterprise AP#ping 10.1.0.19 192.254.2.19 is alive Enterprise AP# reset This command restarts the system or restores the factory default settings. Syntax reset • board - Reboots the system.
CHAPTER 5: COMMAND LINE INTERFACE show history This command shows the contents of the command history buffer. Default Setting None Command Mode Exec Command Usage • The history buffer size is fixed at 10 commands. • Use the up or down arrow keys to scroll through the commands in the history buffer.
Using the Command Line Interface System Management Commands These commands are used to configure the user name, password, system logs, browser management options, clock settings, and a variety of other system information.
CHAPTER 5: COMMAND LINE INTERFACE country This command configures the access point’s country code, which identifies the country of operation and sets the authorized radio channels. Syntax country country_code - A two character code that identifies the country of operation. See the following table for a full list of codes.
Using the Command Line Interface Country Code Country Code Country Code Country Code Costa Rica CR Japan JP Philippines PH Yemen YE Croatia HR Jordan JO Poland PL Venezuela VE Cyprus CY Kazakhstan KZ Portugal PT Vietnam VN Czech Republic CZ North Korea KP Puerto Rico PR Zimbabwe ZW Denmark DK Korea Republic KR Slovenia SI Elsalvador SV Luxembourg LU South Africa ZA Default Setting US - for units sold in the United States 99 (no country set) - for units so
CHAPTER 5: COMMAND LINE INTERFACE Default Setting Enterprise AP Command Mode Global Configuration Example Enterprise AP(config)#prompt RD2 RD2(config)# system name This command specifies or modifies the system name for this device. Use the no form to restore the default system name. Syntax system name no system name name - The name of this host.
Using the Command Line Interface Default Setting admin Command Mode Global Configuration Example Enterprise AP(config)#username bob Enterprise AP(config)# password After initially logging onto the system, you should set the password. Remember to record it in a safe place. Use the no form to reset the default password. Syntax password no password password - Password for management access.
CHAPTER 5: COMMAND LINE INTERFACE Command Mode Interface Configuration (Ethernet) Command Usage • The access point supports Secure Shell version 2.0 only. • After boot up, the SSH server needs about two minutes to generate host encryption keys. The SSH server is disabled while the keys are being generated. The show system command displays the status of the SSH server.
Using the Command Line Interface Command Mode Interface Configuration (Ethernet) Example Enterprise AP(if-ethernet)#ip telnet-server enable Enterprise AP(if-ethernet)# ip http port This command specifies the TCP port number used by the web browser interface. Use the no form to use the default port. Syntax ip http port no ip http port port-number - The TCP port to be used by the browser interface.
CHAPTER 5: COMMAND LINE INTERFACE Command Mode Global Configuration Example Enterprise AP(config)#ip http server Enterprise AP(config)# Related Commands ip http port (5-19) ip https port Use this command to specify the UDP port number used for HTTPS/SSL connection to the access point’s Web interface. Use the no form to restore the default port. Syntax ip https port no ip https port port_number – The UDP port used for HTTPS/SSL.
Using the Command Line Interface ip https server Use this command to enable the secure hypertext transfer protocol (HTTPS) over the Secure Socket Layer (SSL), providing secure access (i.e., an encrypted connection) to the access point’s Web interface. Use the no form to disable this function. Syntax [no] ip https server Default Setting Disabled Command Mode Global Configuration Command Usage • Both HTTP and HTTPS service can be enabled independently.
CHAPTER 5: COMMAND LINE INTERFACE web-redirect Use this command to enable web-based authentication of clients. Use the no form to disable this function. Syntax [no] web-redirect Default Setting Disabled Command Mode Global Configuration Command Usage • The web redirect feature is used to support billing for a public access wireless network. After successful association to an access point, a client is “redirected” to an access point login web page as soon as Internet access is attempted.
Using the Command Line Interface APmgmtIP This command specifies the client IP addresses that are allowed management access to the access point through various protocols. NOTE: Secure Web (HTTPS) connections are not affected by the UI Management or IP Management settings. Syntax APmgmtIP • multiple - Adds IP addresses within a specifiable range to the SNMP, web and Telnet groups. • single - Adds an IP address to the SNMP, web and Telnet groups.
CHAPTER 5: COMMAND LINE INTERFACE Example This example restricts management access to the indicated addresses. Enterprise AP(config)#apmgmtip multiple 192.254.1.50 255.255.255.0 Enterprise AP(config)# APmgmtUI This command enables and disables management access to the access point through SNMP, Telnet and web interfaces. NOTE: Secure Web (HTTPS) connections are not affected by the UI Management or IP Management settings.
Using the Command Line Interface show apmanagement This command shows the AP management configuration, including the IP addresses of management stations allowed to access the access point, as well as the interface protocols which are open to management access.
CHAPTER 5: COMMAND LINE INTERFACE show system This command displays basic system configuration settings. Default Setting None Command Mode Exec Example Enterprise AP#show system System Information ========================================================== Serial Number : A123456789 System Up time : 0 days, 4 hours, 33 minutes, 29 seconds System Name : Enterprise Wireless AP System Location : System Contact : System Country Code : US - UNITED STATES MAC Address : 00-30-F1-F0-9A-9C IP Address : 192.254.2.
Using the Command Line Interface show version This command displays the software version for the system. Command Mode Exec Example Enterprise AP#show version Version Information ========================================= Version: v4.3.2.2 Date : Dec 20 2005, 18:38:12 ========================================= Enterprise AP# show config This command displays detailed configuration information for the system.
CHAPTER 5: COMMAND LINE INTERFACE Protocol Filter Information =========================================================== Local Bridge :DISABLED AP Management :ENABLED Ethernet Type Filter :DISABLED Enabled Protocol Filters ----------------------------------------------------------No protocol filters are enabled =========================================================== Hardware Version Information =========================================== Hardware version R01A ==========================================
Using the Command Line Interface ----------------Security----------------------------------Closed System : DISABLED Multicast cipher : WEP Unicast cipher : TKIP and AES WPA clients : REQUIRED WPA Key Mgmt Mode : PRE SHARED KEY WPA PSK Key Type : ALPHANUMERIC Encryption : DISABLED Default Transmit Key : 1 Static Keys : Key 1: EMPTY Key 2: EMPTY Key 3: EMPTY Key 4: EMPTY Key Length : Key 1: ZERO Key 2: ZERO Key 3: ZERO Key 4: ZERO Authentication Type : OPEN Rogue AP Detection : Disabled Rogue AP Scan Interva
CHAPTER 5: COMMAND LINE INTERFACE Radius Secondary Server Information ======================================== IP : 0.0.0.
Using the Command Line Interface SNTP Information =========================================================== Service State : Disabled SNTP (server 1) IP : 137.92.140.80 SNTP (server 2) IP : 192.43.244.18 Current Time : 00 : 14, Jan 1st, 1970 Time Zone : -5 (BOGOTA, EASTERN, INDIANA) Daylight Saving : Disabled =========================================================== Station Table Information =========================================================== if-wireless A VAP [0] : 802.
CHAPTER 5: COMMAND LINE INTERFACE SSH Server : ENABLED SSH Server Port : 22 Telnet Server : ENABLED WEB Redirect : DISABLED DHCP Relay : DISABLED ============================================================== Version Information ========================================= Version: v4.3.2.2 Date : Dec 20 2005, 18:38:12 ========================================= Enterprise AP# show hardware This command displays the hardware version of the system.
Using the Command Line Interface logging on This command controls logging of error messages; i.e., sending debug or error messages to memory. The no form disables the logging process. Syntax [no] logging on Default Setting Disabled Command Mode Global Configuration Command Usage The logging process controls error messages saved to memory. You can use the logging level command to control the type of error messages that are stored in memory.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting None Command Mode Global Configuration Example Enterprise AP(config)#logging host 1 10.1.0.3 Enterprise AP(config)# logging console This command initiates logging of error messages to the console. Use the no form to disable logging to the console.
Using the Command Line Interface Command Usage Messages sent include the selected level down to Emergency level. Level Argument Description Emergency System unusable Alert Immediate action needed Critical Critical conditions (e.g., memory allocation, or free memory error - resource exhausted) Error Error conditions (e.g., invalid input, default used) Warning Warning conditions (e.g.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(config)#logging facility 19 Enterprise AP(config)# logging clear This command clears all log messages stored in the access point’s memory. Syntax logging clear Command Mode Global Configuration Example Enterprise AP(config)#logging clear Enterprise AP(config)# show logging This command displays the logging configuration.
Using the Command Line Interface show event-log This command displays log messages stored in the access point’s memory. Syntax show event-log Command Mode Exec Example Enterprise AP#show event-log Mar 09 11:57:55 Information: Mar 09 11:57:55 Information: Mar 09 11:57:34 Information: Mar 09 11:57:18 Information: Mar 09 11:56:35 Information: Mar 09 11:55:52 Information: Mar 09 11:55:52 Information: Mar 09 11:55:52 Information: Mar 09 11:55:40 Information: Mar 09 11:55:40 Information: Press next.
CHAPTER 5: COMMAND LINE INTERFACE sntp-server ip This command sets the IP address of the servers to which SNTP time requests are issued. Use the this command with no arguments to clear all time servers from the current list. Syntax sntp-server ip <1 | 2> • 1 - First time server. • 2 - Second time server. • ip - IP address of an time server (NTP or SNTP). Default Setting 137.92.140.80 192.43.244.
Using the Command Line Interface Default Setting Enabled Command Mode Global Configuration Command Usage The time acquired from time servers is used to record accurate dates and times for log events. Without SNTP, the access point only records the time starting from the factory default set at the last bootup (i.e., 00:14:00, January 1, 1970).
CHAPTER 5: COMMAND LINE INTERFACE Related Commands sntp-server enable (5-38) sntp-server daylight-saving This command sets the start and end dates for daylight savings time. Use the no form to disable daylight savings time. Syntax [no] sntp-server daylight-saving Default Setting Disabled Command Mode Global Configuration Command Usage The command sets the system clock back one hour during the specified period. Example This sets daylight savings time to be used from July 1st to September 1st.
Using the Command Line Interface Command Mode Global Configuration Command Usage This command sets the local time zone relative to the Coordinated Universal Time (UTC, formerly Greenwich Mean Time or GMT), based on the earth’s prime meridian, zero degrees longitude. To display a time corresponding to your local time, you must indicate the number of hours and minutes your time zone is east (before) or west (after) of UTC.
CHAPTER 5: COMMAND LINE INTERFACE DHCP Relay Commands Dynamic Host Configuration Protocol (DHCP) can dynamically allocate an IP address and other configuration information to network clients that broadcast a request. To receive the broadcast request, the DHCP server would normally have to be on the same subnet as the client. However, when the access point’s DHCP relay agent is enabled, received client requests can be forwarded directly by the access point to a known DHCP server on another subnet.
Using the Command Line Interface dhcp-relay This command configures the primary and secondary DHCP server addresses. Syntax dhcp-relay • primary - The primary DHCP server. • secondary - The secondary DHCP server. • ip_address - IP address of the server. Default Setting Primary and secondary: 0.0.0.0 Command Mode Global Configuration Example Enterprise AP(config)#dhcp-relay primary 192.254.2.
CHAPTER 5: COMMAND LINE INTERFACE SNMP Commands Controls access to this access point from management stations using the Simple Network Management Protocol (SNMP), as well as the hosts that will receive trap messages.
Using the Command Line Interface snmp-server community This command defines the community access string for the Simple Network Management Protocol. Use the no form to remove the specified community string. Syntax snmp-server community string [ro | rw] no snmp-server community string • string - Community string that acts like a password and permits access to the SNMP protocol. (Maximum length: 23 characters, case sensitive) • ro - Specifies read-only access.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting None Command Mode Global Configuration Example Enterprise AP(config)#snmp-server contact Paul Enterprise AP(config)# Related Commands snmp-server location (5-46) snmp-server location This command sets the system location string. Use the no form to remove the location string. Syntax snmp-server location no snmp-server location text - String that describes the system location.
Using the Command Line Interface snmp-server enable server This command enables SNMP management access and also enables this device to send SNMP traps (i.e., notifications). Use the no form to disable SNMP service and trap messages. Syntax snmp-server enable server no snmp-server enable server Default Setting Enabled Command Mode Global Configuration Command Usage • This command enables both authentication failure notifications and link-up-down notifications.
CHAPTER 5: COMMAND LINE INTERFACE • host_name - Name of the host. (Range: 1-63 characters) • community-string - Password-like community string sent with the notification operation. Although you can set this string using the snmp-server host command by itself, we recommend that you define this string using the snmp-server community command prior to using the snmp-server host command.
Using the Command Line Interface - dot11StationRequestFail - A client station has failed association, re-association, or authentication. - dot1xAuthFail - A 802.1X client station has failed RADIUS authentication. - dot1xAuthNotInitiated - A client station did not initiate 802.1X authentication. - dot1xAuthSuccess - A 802.1X client station has been successfully authenticated by the RADIUS server. - dot1xMacAddrAuthFail - A client station has failed MAC address authentication with the RADIUS server.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting All traps enabled Command Mode Global Configuration Command Usage This command is used in conjunction with the snmp-server host and snmp-server enable server commands to enable SNMP notifications. Example Enterprise AP(config)#no snmp-server trap dot11StationAssociation Enterprise AP(config)# snmp-server engine-id This command is used for SNMP v3. It is used to uniquely identify the access point among all access points in the network.
Using the Command Line Interface snmp-server user This command configures the SNMP v3 users that are allowed to manage the access point. Use the no form to delete an SNMP v3 user. Syntax snmp-server user user-name - A user-defined string for the SNMP user. (32 characters maximum) Default Setting None Command Mode Global Configuration Command Usage • Up to 10 SNMPv3 users can be configured on the access point.
CHAPTER 5: COMMAND LINE INTERFACE - group-name - The name of the SNMP group to which the user is assigned (32 characters maximum). There are three pre-defined groups: RO, RWAuth, or RWPriv. - auth-proto - The authentication type used for user authentication: md5 or none. - auth-passphrase - The user password required when authentication is used (8 – 32 characters). - priv-proto - The encryption type used for SNMP data encryption: des or none.
Using the Command Line Interface • ip-addr - Specifies the IP address of the management station to receive notifications. • sec-name - The defined SNMP v3 user name that is to receive notifications. • version - The SNMP version of notifications. Currently only version 3 is supported in this command. • udp-port - The UDP port that is used on the receiving management station for notifications. • notification-type - The type of notification that is sent. Currently only TRAP is supported.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting None Command Mode Global Configuration Command Usage • The access point allows up to 10 notification filters to be created. Each filter can be defined by up to 20 MIB subtree ID entries. • Use the command more than once with the same filter ID to build a filter that includes or excludes multiple MIB objects. Note that the filter entries are applied in the sequence that they are defined. • The MIB subtree must be defined in the form “.1.3.6.
Using the Command Line Interface Default Setting None Command Mode Global Configuration Example Enterprise AP(config)#snmp-server filter-assignments mytraps trapfilter Enterprise AP(config)#exit Enterprise AP#show snmp target Host ID : mytraps User : chris IP Address : 192.254.2.33 UDP Port : 162 ============================= Enterprise AP#show snmp filter-assignments HostID mytraps FilterID trapfilter Enterprise AP(config)# show snmp groups This command displays the SNMP v3 pre-defined groups.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP#show snmp groups GroupName :RO SecurityModel :USM SecurityLevel :NoAuthNoPriv GroupName :RWAuth SecurityModel :USM SecurityLevel :AuthNoPriv GroupName :RWPriv SecurityModel :USM SecurityLevel :AuthPriv Enterprise AP# show snmp users This command displays the SNMP v3 users and settings.
Using the Command Line Interface Example Enterprise AP#show snmp group-assignments GroupName :RWPriv UserName :chris Enterprise AP# Enterprise AP# show snmp target This command displays the SNMP v3 notification target settings. Syntax show snmp target Command Mode Exec Example Enterprise AP#show snmp target Host ID : mytraps User : chris IP Address : 192.254.2.33 UDP Port : 162 ============================= Enterprise AP# show snmp filter This command displays the SNMP v3 notification filter settings.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP#show snmp filter Filter: trapfilter Type: include Subtree: iso.3.6.1.2.1.2.2.1 Type: exclude Subtree: iso.3.6.1.2.1.2.2.1.1.23 ============================= Enterprise AP# show snmp filter-assignments This command displays the SNMP v3 notification filter assignments.
Using the Command Line Interface show snmp This command displays the SNMP configuration settings. Command Mode Exec Example Enterprise AP#show snmp SNMP Information ============================================== Service State : Enable Community (ro) : ***** Community (rw) : ***** Location : WC-19 Contact : Paul EngineId :80:00:07:e5:80:00:00:2e:62:00:00:00:18 EngineBoots:1 Trap Destinations: 1: 192.254.2.9, 2: 0.0.0.0, 3: 0.0.0.0, 4: 0.0.0.
CHAPTER 5: COMMAND LINE INTERFACE Flash/File Commands These commands are used to manage the system code or configuration files.
Using the Command Line Interface copy This command copies a boot file, code image, or configuration file between the access point’s flash memory and a FTP/TFTP server. When you save the configuration settings to a file on a FTP/TFTP server, that file can later be downloaded to the access point to restore system operation. The success of the file transfer depends on the accessibility of the FTP/TFTP server and the quality of the network connection.
CHAPTER 5: COMMAND LINE INTERFACE Example The following example shows how to upload the configuration settings to a file on the TFTP server: Enterprise AP#copy config tftp TFTP Source file name:syscfg TFTP Server IP:192.254.2.19 Enterprise AP# The following example shows how to download a configuration file: Enterprise AP#copy tftp file 1. Application image 2. Config file 3. Boot block image Select the type of download<1,2,3>: TFTP Source file name:syscfg TFTP Server IP:192.254.2.
Using the Command Line Interface Example This example shows how to delete the test.cfg configuration file from flash memory. Enterprise AP#delete test.cfg Are you sure you wish to delete this file? : Enterprise AP# Related Commands bootfile (5-60) dir (5-63) dir This command displays a list of files in flash memory. Command Mode Exec Command Usage File information is shown below: Column Heading Description File Name The name of the file.
CHAPTER 5: COMMAND LINE INTERFACE show bootfile This command displays the name of the current operation code file that booted the system. Syntax show snmp filter-assignments Command Mode Exec Example Enterprise AP#show bootfile Bootfile Information =================================== Bootfile : ec-img.
Using the Command Line Interface Command Function Mode Page radius-server vlan-format Sets the format for specifying VLAN IDs on the RADIUS server GC 5-69 show radius Shows the current RADIUS settings Exec 5-69 radius-server address This command specifies the primary and secondary RADIUS servers. Syntax radius-server [secondary] address • secondary - Secondary server. • host_ip_address - IP address of server. • host_name - Host name of server.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(config)#radius-server port 181 Enterprise AP(config)# radius-server key This command sets the RADIUS encryption key. Syntax radius-server [secondary] key • secondary - Secondary server. • key_string - Encryption key used to authenticate logon access for client. Do not use blank spaces in the string.
Using the Command Line Interface radius-server timeout This command sets the interval between transmitting authentication requests to the RADIUS server. Syntax radius-server [secondary] timeout number_of_seconds • secondary - Secondary server. • number_of_seconds - Number of seconds the access point waits for a reply before resending a request.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(config)#radius-server port-accounting 1813 Enterprise AP(config)# radius-server timeout-interim This command sets the interval between transmitting accounting updates to the RADIUS server. Syntax radius-server [secondary] timeout-interim • secondary - Secondary server. • number_of_seconds - Number of seconds the access point waits between transmitting accounting updates.
Using the Command Line Interface Default Setting No delimiter Command Mode Global Configuration Example Enterprise AP(config)#radius-server radius-mac-format multi-dash Enterprise AP(config)# radius-server vlan-format This command sets the format for specifying VLAN IDs on the RADIUS server. Syntax radius-server vlan-format • hex - Enter VLAN IDs as a hexadecimal number. • ascii - Enter VLAN IDs as an ASCII string.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP#show radius Radius Server Information ======================================== IP : 0.0.0.0 Port : 1812 Key : ***** Retransmit : 3 Timeout : 5 Radius MAC format : no-delimiter Radius VLAN format : HEX ======================================== Radius Secondary Server Information ======================================== IP : 0.0.0.
Using the Command Line Interface Command Function Mode Page 802.1x-supplicant enable Enables the access point to operate as a 802.1X supplicant GC 5-74 802.1x-supplicant user Sets the supplicant user name and password for the access point GC 5-74 show authentication Shows all 802.1X authentication settings, as well as the Exec address filter table 5-74 802.1x This command configures 802.1X as optionally supported or as required for wireless clients. Use the no form to disable 802.1X support.
CHAPTER 5: COMMAND LINE INTERFACE • When 802.1X is required, the access point enforces 802.1X authentication for all 802.11 associated stations. If 802.1X authentication is not initiated by the station, the access point will initiate authentication. Only those stations successfully authenticated with 802.1X are allowed to access the network. • 802.1X does not apply to the 10/100Base-TX port. Example Enterprise AP(config)#802.1x supported Enterprise AP(config)# 802.
Using the Command Line Interface 802.1x session-key-refresh-rate This command sets the interval at which unicast session keys are refreshed for associated stations using dynamic keying. Syntax 802.1x session-key-refresh-rate rate - The interval at which the access point refreshes a session key.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(config)#802.1x session-timeout 300 Enterprise AP(config)# 802.1x-supplicant enable This command enables the access point to operate as an 802.1X supplicant for authentication. Use the no form to disable 802.1X authentication of the access point. Syntax 802.1x-supplicant enable no 802.1x-supplicant Default Disabled Command Mode Global Configuration Command Usage A user name and password must be configured first before the 802.
Using the Command Line Interface Default None Command Mode Global Configuration Command Usage The access point currently only supports EAP-MD5 CHAP for 802.1X supplicant authentication. Example Enterprise AP(config)#802.1x-supplicant user AP8760 dot1xpass Enterprise AP(config)# show authentication This command shows all 802.1X authentication settings, as well as the address filter table.
CHAPTER 5: COMMAND LINE INTERFACE MAC Address Authentication Use these commands to define MAC authentication on the access point. For local MAC authentication, first define the default filtering policy using the address filter default command. Then enter the MAC addresses to be filtered, indicating if they are allowed or denied. For RADIUS MAC authentication, the MAC addresses and filtering policy must be configured on the RADIUS server.
Using the Command Line Interface Example Enterprise AP(config)#address filter default denied Enterprise AP(config)# Related Commands address filter entry (5-77) 802.1x-supplicant user (5-74) address filter entry This command enters a MAC address in the filter table. Syntax address filter entry • mac-address - Physical address of client. (Enter six pairs of hexadecimal digits separated by hyphens; e.g., 00-90-D1-12-AB-89.) • allowed - Entry is allowed access.
CHAPTER 5: COMMAND LINE INTERFACE address filter delete This command deletes a MAC address from the filter table. Syntax address filter delete mac-address - Physical address of client. (Enter six pairs of hexadecimal digits separated by hyphens.) Default None Command Mode Global Configuration Example Enterprise AP(config)#address filter delete 00-70-50-cc-99-1b Enterprise AP(config)# Related Commands 802.
Using the Command Line Interface Related Commands address filter entry (5-77) radius-server address (5-65) 802.1x-supplicant user (5-74) mac-authentication session-timeout This command sets the interval at which associated clients will be re-authenticated with the RADIUS server authentication database. Use the no form to disable reauthentication. Syntax mac-authentication session-timeout minutes - Re-authentication interval.
CHAPTER 5: COMMAND LINE INTERFACE Command Function Mode Page filter ethernet-type protocol Sets a filter for a specific Ethernet type GC 5-83 show filters Shows the filter configuration Exec 5-83 filter local-bridge This command disables communication between wireless clients. Use the no form to disable this filtering.
Using the Command Line Interface filter ap-manage This command prevents wireless clients from accessing the management interface on the access point. Use the no form to disable this filtering. Syntax [no] filter ap-manage Default Enabled Command Mode Global Configuration Example Enterprise AP(config)#filter AP-manage Enterprise AP(config)# filter uplink enable This command enables filtering of MAC addresses from the Ethernet port.
CHAPTER 5: COMMAND LINE INTERFACE Default Disabled Command Mode Global Configuration Example Enterprise AP(config)#filter uplink add 00-12-34-56-78-9a Enterprise AP(config)# filter ethernet-type enable This command checks the Ethernet type on all incoming and outgoing Ethernet packets against the protocol filtering table. Use the no form to disable this feature.
Using the Command Line Interface filter ethernet-type protocol This command sets a filter for a specific Ethernet type. Use the no form to disable filtering for a specific Ethernet type. Syntax filter ethernet-type protocol no filter ethernet-type protocol protocol - An Ethernet protocol type.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP#show filters Protocol Filter Information ======================================================================= Local Bridge :Traffic among all client STAs blocked AP Management :ENABLED Ethernet Type Filter :DISABLED UPlink Access Table ----------------------------------------------------------------------UPlink access control:Enabled UPlink MAC access control list : 00-12-34-56-78-9a -----------------------------------------------------------------
Using the Command Line Interface bridge role (WDS) This command selects the bridge operation mode for the radio interface. Syntax bridge role • ap - Operates only as an access point for wireless clients. • repeater - Operates as a wireless repeater, extending the range for remote wireless clients and connecting them to the root bridge. The “Parent” link to the root bridge must be configured.
CHAPTER 5: COMMAND LINE INTERFACE bridge-link parent This command configures the MAC address of the parent bridge node. Syntax bridge-link parent mac-address - The wireless MAC address of the parent bridge unit. (12 hexadecimal digits in the form “xx-xx-xx-xx-xx-xx”).
Using the Command Line Interface • In bridge mode, up to five child links can be specified using link index numbers 2 to 6. Index number 1 is reserved for the parent link, which must be set using the bridge parent command.
CHAPTER 5: COMMAND LINE INTERFACE show bridge aging-time This command displays the current WDS forwarding table aging time setting.
Using the Command Line Interface show bridge filter-entry This command displays current entries in the WDS forwarding table.
CHAPTER 5: COMMAND LINE INTERFACE show bridge link This command displays WDS bridge link and spanning tree settings for specified interfaces. Syntax show bridge link [index]> • ethernet - Specifies the Ethernet interface. • wireless - Specifies a wireless interface. - a - The 802.11a radio interface. - g - The 802.11g radio interface. - index - The index number of a bridge link.
Using the Command Line Interface Enterprise AP#show bridge link wireless a 2 Port-No : 11 status : Enabled state : Disabled priority : 0 path cost : 19 message age Timer : Inactive message age : 4469 designated-root : priority = 32768, MAC = 00:30:F1:F0:9A:9C designated-cost : 0 designated-bridge : priority = 32768, MAC = 00:30:F1:F0:9A:9C designated-port : priority = 0, port No = 11 forward-transitions : 0 Enterprise AP# Enterprise AP#show bridge link ethernet status : Enabled state : Forwarding priority
CHAPTER 5: COMMAND LINE INTERFACE Command Function Mode Page show bridge stp Displays the global spanning tree settings Exec 5-96 show bridge link Displays current bridge settings for specified interfaces Exec 5-90 bridge stp enable This command enables the Spanning Tree Protocol. Use the no form to disable the Spanning Tree Protocol. Syntax [no] bridge stp enable Default Setting Enabled Command Mode Global Configuration Example This example globally enables the Spanning Tree Protocol.
Using the Command Line Interface Default Setting 15 seconds Command Mode Global Configuration Command Usage This command sets the maximum time (in seconds) the root device will wait before changing states (i.e., discarding to learning to forwarding). This delay is required because every device must receive information about topology changes before it starts to forward frames.
CHAPTER 5: COMMAND LINE INTERFACE bridge stp max-age Use this command to configure the spanning tree bridge maximum age globally for the wireless bridge. Use the no form to restore the default. Syntax bridge stp max-age no bridge stp max-age seconds - Time in seconds. (Range: 6-40 seconds) The minimum value is the higher of 6 or [2 x (hello-time + 1)]. The maximum value is the lower of 40 or [2 x (forward-time - 1)].
Using the Command Line Interface Default Setting 32768 Command Mode Global Configuration Command Usage Bridge priority is used in selecting the root device, root port, and designated port. The device with the highest priority becomes the STP root device. However, if all devices have the same priority, the device with the lowest MAC address will then become the root device.
CHAPTER 5: COMMAND LINE INTERFACE bridge-link port-priority Use this command to configure the priority for the specified port. Syntax bridge-link port-priority • index - Specifies the bridge link number on the wireless bridge. (Range: 1-6 required on wireless interface only) • priority - The priority for a port. (Range: 1-255) Default Setting 128 Command Mode Interface Configuration Command Usage • This command defines the priority for the use of a port in the Spanning Tree Protocol.
Using the Command Line Interface Example Enterprise AP#show bridge stp Bridge MAC : 00:12:CF:05:B7:84 Status : Disabled priority : 0 designated-root : priority = 0, MAC = 00:00:00:00:00:00 root-path-cost : 0 root-Port-no : 0 Hold Time : 1 Seconds Hello Time : 2 Seconds Maximum Age : 20 Seconds Forward Delay : 15 Seconds bridge Hello Time : 2 Seconds bridge Maximum Age : 20 Seconds bridge Forward Delay : 15 Seconds time-since-top-change: 89185 Seconds topology-change-count: 0 Enterprise AP# Ethernet Interf
CHAPTER 5: COMMAND LINE INTERFACE interface ethernet This command enters Ethernet interface configuration mode. Default Setting None Command Mode Global Configuration Example To specify the 10/100Base-TX network interface, enter the following command: Enterprise AP(config)#interface ethernet Enterprise AP(if-ethernet)# dns server This command specifies the address for the primary or secondary domain name server to be used for name-to-address resolution.
Using the Command Line Interface Related Commands show interface ethernet (5-102) ip address This command sets the IP address for the access point. Use the no form to restore the default IP address. Syntax ip address no ip address • ip-address - IP address • netmask - Network mask for the associated IP subnet. This mask identifies the host address bits used for routing to specific subnets. • gateway - IP address of the default gateway Default Setting IP address: 192.254.2.
CHAPTER 5: COMMAND LINE INTERFACE ip dhcp This command enables the access point to obtain an IP address from a DHCP server. Use the no form to restore the default IP address. Syntax [no] ip dhcp Default Setting Enabled Command Mode Interface Configuration (Ethernet) Command Usage • You must assign an IP address to this device to gain management access over the network or to connect the access point to existing IP subnets.
Using the Command Line Interface speed-duplex This command configures the speed and duplex mode of a given interface when autonegotiation is disabled. Use the no form to restore the default.
CHAPTER 5: COMMAND LINE INTERFACE Command Usage This command allows you to disable the Ethernet port due to abnormal behavior (e.g., excessive collisions), and reenable it after the problem has been resolved. You may also want to disable the Ethernet port for security reasons. Example The following example disables the Ethernet port. Enterprise AP(if-ethernet)#shutdown Enterprise AP(if-ethernet)# show interface ethernet This command displays the status for the Ethernet interface.
Using the Command Line Interface Wireless Interface Commands The commands described in this section configure connection parameters for the wireless interfaces.
CHAPTER 5: COMMAND LINE INTERFACE Command Function Mode Page ssid Configures the service set identifier IC-W-VAP 5-118 closed system Opens access to clients without a pre-configured SSID IC-W-VAP 5-118 max-association Configures the maximum number of clients that can IC-W-VAP be associated with the access point at the same time 5-119 assoc- timeout-interval Configures the idle time interval (when no frames are IC-W-VAP sent) after which a client is disassociated from the VAP interface 5-11
Using the Command Line Interface vap This command provides access to the VAP (Virtual Access Point) interface configuration mode. Syntax vap vap-id - The number that identifies the VAP interface. (Options: 0-3) Default Setting None Command Mode Interface Configuration (Wireless) Example Enterprise AP(if-wireless g)#vap 0 Enterprise AP(if-wireless g: VAP[0])# speed This command configures the maximum data rate at which the access point transmits unicast packets.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(if-wireless g)#speed 6 Enterprise AP(if-wireless g)# turbo This command sets the access point to an enhanced proprietary modulation mode (not regulated in IEEE 802.11a) that provides a higher data rate of up to 108 Mbps. Syntax turbo no turbo static - Always uses turbo mode. dynamic - Will use turbo mode when no other nearby access points are detected or active.
Using the Command Line Interface multicast-data-rate This command configures the maximum data rate at which the access point transmits multicast and management packets (excluding beacon packets) on the wireless interface. Syntax multicast-data-rate speed - Maximum transmit speed allowed for multicast data. (Options for 802.11a: 6, 12, 24 Mbps) (Options for 802.11b/g; 1, 2, 5.5, 11 Mbps) Default Setting 1 Mbps for 802.11b/g 6 Mbps for 802.
CHAPTER 5: COMMAND LINE INTERFACE channel This command configures the radio channel through which the access point communicates with wireless clients. Syntax channel • channel - Manually sets the radio channel used for communications with wireless clients. (Range for 802.11a: 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165 for normal mode, and 42, 50, 58, 152, 160 for turbo mode; Range for 802.11b/g: 1 to 14) • auto - Automatically selects an unoccupied channel (if available).
Using the Command Line Interface transmit-power This command adjusts the power of the radio signals transmitted from the access point. Syntax transmit-power signal-strength - Signal strength transmitted from the access point. (Options: full, half, quarter, eighth, min) Default Setting full Command Mode Interface Configuration (Wireless) Command Usage • The “min” keyword indicates minimum power. • The longer the transmission distance, the higher the transmission power required.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting b+g mode Command Mode Interface Configuration (Wireless - 802.11g) Command Usage • For Japan, only 13 channels are available when set to g or b+g modes. When set to b mode, 14 channels are available. • Both the 802.11g and 802.11b standards operate within the 2.4 GHz band. If you are operating in g mode, any 802.11b devices in the service area will contribute to the radio frequency noise and affect network performance.
Using the Command Line Interface Example Enterprise AP(if-wireless g)#preamble short Enterprise AP(if-wireless g)# antenna control This command selects the use of two diversity antennas or a single antenna for the radio interface. Syntax antenna control • diversity - The radio uses both antennas in a diversity system. Select this method when the Antenna ID is set to “Default Antenna” to use the access point's integrated antennas.
CHAPTER 5: COMMAND LINE INTERFACE antenna id This command specifies the antenna type connected to the access point represented by a four-digit hexadecimal ID number, either the integrated diversity antennas (the “Default Antenna”) or an optional external antenna.
Using the Command Line Interface Default Setting Indoor Command Mode Interface Configuration (Wireless) Command Usage • When an external antenna is selected, the antenna control must be set to “right.” • Selecting the correct location ensures that the access point only uses radio channels that are permitted in the country of operation.
CHAPTER 5: COMMAND LINE INTERFACE dtim-period This command configures the rate at which stations in sleep mode must wake up to receive broadcast/multicast transmissions. Syntax dtim-period interval - Interval between the beacon frames that transmit broadcast or multicast traffic.
Using the Command Line Interface fragmentation-length This command configures the minimum packet size that can be fragmented when passing through the access point. Syntax fragmentation-length length - Minimum packet size for which fragmentation is allowed. (Range: 256-2346 bytes) Default Setting 2346 Command Mode Interface Configuration (Wireless) Command Usage • If the packet size is smaller than the preset Fragment size, the packet will not be segmented.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting 2347 Command Mode Interface Configuration (Wireless) Command Usage • If the threshold is set to 0, the access point always sends RTS signals. If set to 2347, the access point never sends RTS signals. If set to any other value, and the packet size equals or exceeds the RTS threshold, the RTS/CTS (Request to Send / Clear to Send) mechanism will be enabled. • The access point sends RTS frames to a receiving station to negotiate the sending of a data frame.
Using the Command Line Interface Example Enterprise AP(if-wireless a)#super a Enterprise AP(if-wireless a)# super-g This command enables Atheros proprietary Super G performance enhancements. Use the no form to disable this function. Syntax [no] super-g Default Setting Disabled Command Mode Interface Configuration (Wireless - 802.11g) Command Usage These enhancements include bursting, compression, fast frames and dynamic turbo.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(if-wireless g: VAP[0])#description RD-AP#3 Enterprise AP(if-wireless g: VAP[0])# ssid This command configures the service set identifier (SSID). Syntax ssid string - The name of a basic service set supported by the access point. (Range: 1 - 32 characters) Default Setting 802.11a Radio: VAP_TEST_11A (0 to 3) 802.
Using the Command Line Interface Command Mode Interface Configuration (Wireless-VAP) Command Usage When closed system is enabled, the access point will not include its SSID in beacon messages. Nor will it respond to probe requests from clients that do not include a fixed SSID. Example Enterprise AP(if-wireless g: VAP[0])#closed-system Enterprise AP(if-wireless g)# max-association This command configures the maximum number of clients that can be associated with the access point at the same time.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting 30 Command Mode Interface Configuration (Wireless-VAP) Example Enterprise AP(if-wireless g: VAP[0])#association-timeout-interval 20 Enterprise AP(if-wireless g: VAP[0])# auth-timeout-value This command configures the time interval within which clients must complete authentication to the VAP interface. Syntax auth-timeout-value minutes - The number of minutes before re-authentication.
Using the Command Line Interface Command Usage You must first enable VAP interface 0 before you can enable VAP interfaces 1, 2, 3, 4, 5, 6, or 7. Example Enterprise AP(if-wireless g: VAP[0])#shutdown Enterprise AP(if-wireless g)# show interface wireless This command displays the status for the wireless interface. Syntax show interface wireless vap-id • a - 802.11a radio interface. • g - 802.11g radio interface. • vap-id - The number that identifies the VAP interface.
CHAPTER 5: COMMAND LINE INTERFACE Command Mode Exec Example Enterprise AP#show interface wireless g 0 Wireless Interface Information ========================================================================= ----------------Identification------------------------------------------Description : Enterprise 802.11g Access Point SSID : VAP_G 0 Channel : 1 (AUTO) Status : ENABLED MAC Address : 00:03:7f:fe:03:02 ----------------802.
Using the Command Line Interface ----------------Security------------------------------------------------Closed System : Disabled Multicast cipher : WEP Unicast cipher : TKIP and AES WPA clients : DISABLED WPA Key Mgmt Mode : PRE SHARED KEY WPA PSK Key Type : PASSPHRASE WPA PSK Key : EMPTY PMKSA Lifetime : 720 minutes Encryption : ENABLED Default Transmit Key : 1 Common Static Keys : Key 1: EMPTY Key 2: EMPTY Key 3: EMPTY Key 4: EMPTY Pre-Authentication : DISABLED Authentication Type : SHARED -------------
CHAPTER 5: COMMAND LINE INTERFACE WMM AP Parameters AC0(Best Effort) : logCwMin: 4 logCwMax: 6 AIFSN: 3 Admission Control: No TXOP Limit: 0.000 ms AC1(Background) : logCwMin: 4 logCwMax: 10 AIFSN: 7 Admission Control: No TXOP Limit: 0.000 ms AC2(Video) : logCwMin: 3 logCwMax: 4 AIFSN: 1 Admission Control: No TXOP Limit: 3.008 ms AC3(Voice) : logCwMin: 2 logCwMax: 3 AIFSN: 1 Admission Control: No TXOP Limit: 1.
Using the Command Line Interface show station This command shows the wireless clients associated with the access point. Command Mode Exec Example Enterprise AP#show station Station Table Information ======================================================== if-wireless A VAP [0] : 802.11a Channel : 60 No 802.11a Channel Stations. . . . if-wireless G VAP [0] : 802.11g Channel : 1 802.
CHAPTER 5: COMMAND LINE INTERFACE The access point can be configured to periodically scan all radio channels and find other access points within range. A database of nearby access points is maintained where any rogue APs can be identified.
Using the Command Line Interface The rogue AP database can be viewed using the show rogue-ap command. • The access point sends Syslog messages for each detected access point during a rogue AP scan. Example Enterprise AP(if-wireless g)#rogue-ap enable configure either syslog or trap or both to receive the rogue APs detected. Enterprise AP(if-wireless g)# rogue-ap authenticate This command forces the unit to authenticate all access points on the network. Use the no form to disable this function.
CHAPTER 5: COMMAND LINE INTERFACE rogue-ap duration This command sets the scan duration for detecting access points. Syntax rogue-ap duration milliseconds - The duration of the scan. (Range: 100-1000 milliseconds) Default Setting 350 milliseconds Command Mode Interface Configuration (Wireless) Command Usage • During a scan, client access may be disrupted and new clients may not be able to associate to the access point. If clients experience severe disruption, reduce the scan duration time.
Using the Command Line Interface Default Setting 720 minutes Command Mode Interface Configuration (Wireless) Command Usage This command sets the interval at which scans occur. Frequent scanning will more readily detect other access points, but will cause more disruption to client access.
CHAPTER 5: COMMAND LINE INTERFACE show rogue-ap This command displays the current rogue AP database. Command Mode Exec Example Enterprise AP#show rogue-ap 802.11a Channel : Rogue AP Status AP Address(BSSID) SSID Channel(MHz) RSSI Type Privacy RSN ====================================================================== 802.
Using the Command Line Interface Command Function Mode Page pmksa-lifetime Sets the lifetime PMK security associations IC-W-VAP 5-139 pre-authentication Enables WPA2 pre-authentication for fast roaming IC-W-VAP 5-139 auth This command configures authentication for the VAP interface.
CHAPTER 5: COMMAND LINE INTERFACE • To use WEP shared-key authentication, set the authentication type to “shared-key” and define at least one static WEP key with the key command. Encryption is automatically enabled by the command. • To use WEP encryption only (no authentication), set the authentication type to “open-system.” Then enable WEP with the encryption command, and define at least one static WEP key with the key command.
Using the Command Line Interface WEP). To place the VAP into AES only mode, use “required” and then select the “cipher-ccmp” option for the cipher-suite command. Example Enterprise AP(if-wireless g: VAP[0])#auth shared-key Enterprise AP(if-wireless g)# Related Commands encryption (5-133) key (5-134) encryption This command enables data encryption for wireless communications. Use the no form to disable data encryption.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(if-wireless g: VAP[0])#encryption Enterprise AP(if-wireless g)# Related Commands key (5-134) key This command sets the keys used for WEP encryption. Use the no form to delete a configured key. Syntax key no key index • • • • index - Key index. (Range: 1-4) size - Key size. (Options: 64, 128, or 152 bits) type - Input format. (Options: ASCII, HEX) value - The key string.
Using the Command Line Interface Example Enterprise Enterprise Enterprise Enterprise AP(if-wireless AP(if-wireless AP(if-wireless AP(if-wireless g)#key 1 64 hex 1234512345 g)#key 2 128 ascii asdeipadjsipd g)#key 3 64 hex 12345123451234512345123456 g)# Related Commands key (5-134) encryption (5-133) transmit-key (5-135) transmit-key This command sets the index of the key to be used for encrypting data frames for broadcast or multicast traffic transmitted from the VAP to wireless clients.
CHAPTER 5: COMMAND LINE INTERFACE cipher-suite This command defines the cipher algorithm used to encrypt the global key for broadcast and multicast traffic when using Wi-Fi Protected Access (WPA) security. Syntax cipher-suite • aes-ccmp - Use AES-CCMP encryption for the unicast and multicast cipher. • tkip - Use TKIP encryption for the multicast cipher. TKIP or AES-CCMP can be used for the unicast cipher depending on the capability of the client.
Using the Command Line Interface • AES-CCMP (Advanced Encryption Standard Counter-Mode/CBCMAC Protocol): WPA2 is backward compatible with WPA, including the same 802.1X and PSK modes of operation and support for TKIP encryption. The main enhancement is its use of AES Counter-Mode encryption with Cipher Block Chaining Message Authentication Code (CBC-MAC) for message integrity. The AES Counter-Mode/CBCMAC Protocol (AES-CCMP) provides extremely robust data confidentiality using a 128-bit key.
CHAPTER 5: COMMAND LINE INTERFACE • Using the “software” option provides the best performance for a large number of clients on one radio interface. Throughput may be reduced when both 802.11a and 802.11g interfaces are supporting a high number of clients simultaneously. Example Enterprise AP(if-wireless a)#mic_mode hardware Enterprise AP(if-wireless g)# wpa-pre-shared-key This command defines a Wi-Fi Protected Access (WPA/WPA2) Pre-shared-key.
Using the Command Line Interface pmksa-lifetime This command sets the time for aging out cached WPA2 Pairwise Master Key Security Association (PMKSA) information for fast roaming. Syntax pmksa-lifetime minutes - The time for aging out PMKSA information.
CHAPTER 5: COMMAND LINE INTERFACE Default Setting Disabled Command Mode Interface Configuration (Wireless-VAP) Command Usage • Each time a client roams to another access point it has to be fully re-authenticated. This authentication process is time consuming and can disrupt applications running over the network. WPA2 includes a mechanism, known as pre-authentication, that allows clients to roam to a new access point and be quickly associated.
Using the Command Line Interface Link Integrity Commands The access point provides a link integrity feature that can be used to ensure that wireless clients are connected to resources on the wired network. The access point does this by periodically sending Ping messages to a host device in the wired Ethernet network. If the access point detects that the connection to the host has failed, it disables the radio interfaces, forcing clients to find and associate with another access point.
CHAPTER 5: COMMAND LINE INTERFACE host does not respond or is unreachable) exceeds the limit set by the link-integrity ping-fail-retry command, the link is determined as lost. Example Enterprise AP(config)#link-integrity ping-detect Enterprise AP(config)# link-integrity ping-host This command configures the link host name or IP address. Use the no form to remove the host setting. Syntax link-integrity ping-host no link-integrity ping-host • host_name - Alias of the host.
Using the Command Line Interface Example Enterprise AP(config)#link-integrity ping-interval 20 Enterprise AP(config)# link-integrity ping-fail-retry This command configures the number of consecutive failed Ping counts before the link is determined as lost. Syntax link-integrity ping-fail-retry counts - The number of failed Ping counts before the link is determined as lost.
CHAPTER 5: COMMAND LINE INTERFACE show link-integrity This command displays the current link integrity configuration. Command Mode Exec Example Enterprise AP#show link-integrity Link Integrity Information =========================================================== Ethernet Detect : Enabled Ping Detect : Enabled Target IP/Name : 192.254.0.
Using the Command Line Interface between access points from different vendors. This command is used to enable or disable 802.11f handover signaling between different access points, especially in a multi-vendor environment. Example Enterprise AP(config)#iapp Enterprise AP(config)# VLAN Commands The access point can enable the support of VLAN-tagged traffic passing between wireless clients and the wired network.
CHAPTER 5: COMMAND LINE INTERFACE vlan This command enables VLANs for all traffic. Use the no form to disable VLANs. Syntax [no] vlan enable Default Disabled Command Mode Global Configuration Command Description • When VLANs are enabled, the access point tags frames received from wireless clients with the VLAN ID configured for each client on the RADIUS server. If the VLAN ID has not been configured for a client on the RADIUS server, then the frames are tagged with the access point’s native VLAN ID.
Using the Command Line Interface Default Setting 1 Command Mode Global Configuration Command Usage The management VLAN is for managing the access point. For example, the access point allows traffic that is tagged with the specified VLAN to manage the access point via remote management, SSH, SNMP, Telnet, etc. Example Enterprise AP(config)#management-vlanid 3 Enterprise AP(config)# Related Commands vlan (5-146) vlan-id This command configures the default VLAN ID for the VAP interface.
CHAPTER 5: COMMAND LINE INTERFACE • If the VLAN ID has not been configured for a client on the RADIUS server, then the frames are tagged with the default VLAN ID of the VAP interface. Example Enterprise AP(if-wireless g: VAP[0])#vlan-id 3 Enterprise AP(if-wireless g: VAP[0])# WMM Commands The access point implements QoS using the Wi-Fi Multimedia (WMM) standard.
Using the Command Line Interface Default supported Command Mode Interface Configuration (Wireless) Example Enterprise AP(if-wireless a)#wmm required Enterprise AP(if-wireless a)# wmm-acknowledge-policy This command allows the acknowledgement wait time to be enabled or disabled for each Access Category (AC). Syntax wmm-acknowledge-policy • ac_number - Access categories. (Range: 0-3) • ack - Require the sender to wait for an acknowledgement from the receiver.
CHAPTER 5: COMMAND LINE INTERFACE Example Enterprise AP(if-wireless a)#wmm-acknowledge-policy 0 noack Enterprise AP(if-wireless a)# wmmparam This command configures detailed WMM parameters that apply to the access point (AP) or the wireless clients (BSS). Syntax wmmparam • AP - Access Point • BSS - Wireless client • ac_number - Access categories (ACs) – voice, video, best effort, and background.
Using the Command Line Interface Default AP Parameters WMM Parameters AC0 (Best Effort) AC1 (Background) AC2 (Video) AC3 (Voice) LogCwMin 4 4 3 2 LogCwMax 10 10 4 3 AIFS 3 7 2 2 TXOP Limit 0 0 94 47 Admission Control Disabled Disabled Disabled Disabled WMM Parameters AC0 (Best Effort) AC1 (Background) AC2 (Video) AC3 (Voice) LogCwMin 4 4 3 2 LogCwMax 6 10 4 3 AIFS 3 7 1 1 TXOP Limit 0 0 94 47 Admission Control Disabled Disabled Disabled Disabled B
CHAPTER 5: COMMAND LINE INTERFACE 5-152
6 TROUBLESHOOTING If you have difficulty with the 3Com Wireless LAN access point, first check the following items in the configuration: Radio Settings page: Ensure that the SSID is the same on clients and the access point. Security page: Ensure that Encryption is the same on clients and the access point. Authentication page: Ensure that the Local MAC Authentication System Default is set to Allow. Ensure that 802.1x Authentication Settings are correct.
CHAPTER 6: TROUBLESHOOTING Symptom Solutions Verify the access point configuration. Review access point firmware revisions and update firmware if necessary. No operation. Make sure that there are no duplicate IP addresses on the network. Unplug the access point and ping the assigned address to make sure that no other device responds to that address. Confirm that the service area on the access point matches that on the clients. Verify that the clients are operating correctly.
Symptom Solutions To maintain wireless association, the service area and the security settings on the client and the access point must match exactly. Therefore, if you are associated with the access point that you are configuring and you change the access point service area or security, make sure to change the client service area to match. While you are configuring the access point, the Configuration Management System stops responding.
CHAPTER 6: TROUBLESHOOTING 6-4
INDEX configuration settings, saving or restoring 5-61 configuration, initial setup 3-1 connecting power 2-2, 2-6 country code configuring 5-14 CTS 4-41, 5-116 Numbers 3Com 3CDaemon Server Tool 2-14 3Com Wireless Infrastructure Device Manager 2-14 802.
gateway address 4-6, 5-2, 5-99 web 3-5 logon authentication RADIUS client 4-13, 5-64 H M hardware version, displaying 5-27 HTTP, secure server 5-21 HTTPS 5-21 MAC address recording 2-4 MAC address, authentication 4-11, 5-76, 5-77 maximum associated clients 4-40 maximum data rate 5-107 802.11a interface 5-107 802.11g interface 5-107 G I IAPP 5-144 IEEE 802.11a 4-35, 5-104 configuring interface 4-36, 5-104 maximum data rate 5-107 radio channel 5-108 IEEE 802.11b 4-35 IEEE 802.11f 5-144 IEEE 802.
troubleshooting 6-1 RTS threshold 4-41, 5-115 U S upgrading software 4-24, 5-61 user name, manager 4-23, 5-16 user password 4-23, 5-16, 5-17 safety information 2-2 Secure Socket Layer See SSL security, options 4-49 session key 4-10, 4-13, 5-73 shared key 3-10, 4-56, 5-134 Simple Network Time Protocol See SNTP SNMP 4-18, 5-44 community name 5-45 community string 5-45 enabling traps 4-19, 5-47 trap destination 4-19, 5-47 trap manager 4-19, 5-47 SNTP 4-34, 5-38 enabling client 4-34, 5-38 server 4-34, 5-38
