0/100Mbps Ethernet/Fast Ethernet Switch Model DES-2212 User’s Guide Rev. 02 (October, 1997) 6DES2212..
Wichtige Sicherheitshinweise 1. Bitte lesen Sie sich diese Hinweise sorgfältig durch. 2. Heben Sie diese Anleitung für den spätern Gebrauch auf. 3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine Flüssig- oder Aerosolreiniger. Am besten dient ein angefeuchtetes Tuch zur Reinigung. 4. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile verwenden, die vom Hersteller zugelassen sind. 5. Das Gerät is vor Feuchtigkeit zu schützen. 6.
WARRANTIES EXCLUSIVE IF THE D-LINK PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, THE CUSTOMER'S SOLE REMEDY SHALL BE, AT D-LINK'S OPTION, REPAIR OR REPLACEMENT. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, EITHER IN FACT OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
Limited Warranty Hardware: D-Link warrants its hardware products to be free from defects in workmanship and materials, under normal use and service, for the following lengths of time from the date of purchase from D-Link or its Authorized Reseller: Product Type Network adapters Unmanaged and managed hubs (10Mbps) Unmanaged and managed hubs (100Mbps) Managed Switches Unmanaged switches Repeaters, MAUs , transceivers, media converters Concentrators Internetworking products * Power supply and fans in these dev
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Trademarks Copyright 1997 D-Link Corporation. Contents subject to change without prior notice. D-Link is a registered trademark of D-Link Corporation/D-Link Systems, Inc. All other trademarks belong to their respective proprietors. Copyright Statement No part of this publication may be reproduced in any form or by any means or used to make any derivative such as translation, transformation, or adaptation without permission from D-Link Corporation/D-Link Systems Inc.
T ABLE OF C ONTENTS 0 ABOUT THIS GUIDE.......................................................... XI 1 INTRODUCTION ................................................................. 1 DES-2212 Ethernet/Fast Ethernet Switch ................................................. 1 Ports .................................................................................................................... 1 Switching .......................................................................................................
Rack Mounting.................................................................................................. 14 Connecting Power ................................................................................... 15 Replacing the Fuse ............................................................................................ 16 4 MAKING NETWORK CONNECTIONS ................................... 17 10BASE-T Connection.............................................................................
Displaying Port Statistics .................................................................................. 49 Resetting the Switch................................................................................. 51 System Reset ..................................................................................................... 51 Factory Reset..................................................................................................... 52 6 PRODUCT SPECIFICATIONS ...............................
0 A BOUT T HIS G UIDE This manual explains how to set up and use the D-Link DES-2212 12-port Ethernet/Fast Ethernet switch. The contents include: ♦ Chapter 1 Introduction Introduces the features of the DES-2212. ♦ Chapter 2 External Features Introduces the external features (including the front panel, LED indicators, and rear panel) of the DES2212 switching hub. ♦ Chapter 3 Installation Tells how to unpack and install the switch.
4 1 I NTRODUCTION This chapter introduces the D-Link DES-2212 switch, and the technologies that it uses to give you improved network performance and reliability. DES-2212 Ethernet/Fast Ethernet Switch The DES-2212 is an Ethernet/Fast Ethernet switch for networks needing improved performance, the ability to interconnect between 10Mbps and 100Mbps Ethernet networks, and SNMP network management capability.
All of the ports can operate in either half-duplex or full-duplex mode. Fullduplex operation, allowing the port to transmit and receive at the same time, can double overall network bandwidth in many applications. Switching The DES-2212 uses store-and-forward technology to bridge packets between ports. Forwarding and filtering occurs at full “wire speed,” 148,800 packets per second (pps) for Fast Ethernet, and 14,880 pps for Ethernet.
100Mbps Fast Ethernet Introduction Computers today have become increasingly powerful, with the capability to accommodate very sophisticated uses such as multimedia applications, videoconferencing, and CAD/CAM. To utilize these technologically advanced applications more efficiently, there is also a growing demand for faster networks that can handle heavy network traffic.
closet must be Category 5 certified. Where these blocks do not meet the standard, an upgrade is necessary. Topology A Fast Ethernet workgroup is configured in a star topology and is built around a maximum of two repeaters. Each workgroup forms a separate LAN (also known as a segment or collision domain), and these workgroups can be easily interconnected through switches, bridges, or routers to form one LAN large enough to encompass a high-rise building or campus environment.
Hubs Unlike 10BASE-T hubs, which are all functionally identical, Fast Ethernet repeater hubs are divided into two distinct types: Class I and Class II. A Class I hub repeats all incoming signals on one port to the other ports by first translating them to digital signals and then retranslating them back to line signals.
Ethernet Switching Introduction Another approach to pushing beyond the limits of Ethernet technology is the development of switching technology. A switch bridges Ethernet packets at the lowest (MAC address) level between connected Ethernet or Fast Ethernet LAN segments. Switching is a cost-effective way of increasing the total network capacity available to users on a local area network.
5 2 E XTERNAL F EATURES This chapter explains the features visible on the front and rear panels of the DES-2212 Ethernet switch. Front Panel A front view of the DES-2212 Ethernet switch is shown below.
♦ LED Indicator Panel Gives status information about the switch itself, as well as each of the switch ports. The LED indicator panel is described in detail in the next section. ♦ Console Port The diagnostic console port is a standard RS-232 DB-9 connector, which can be used to connect a terminal or terminal emulator to the switch, in order to configure or manage the hub. The port can also be used for out-of-band network management.
LED Indicators ♦ Power Lights when the DES-2212 Ethernet switch is powered on. ♦ Console Lights when the DES-2212 console interface is in use. ♦ MII Lights when the switch’s MII port is being used to connect to a transceiver. If there is an active connection on the MII port, then the Link/Act LED for port 2x will also light. ♦ 100M (Ports 1 through 4 ) Lights when the port is operating at 100Mbps.
Rear Panel ♦ Cooling Fans Used to control the temperature within the switch’s enclosure. When installing the switch, be sure not to block the fan openings or otherwise restrict airflow. ♦ MII Port Used for connecting Fast Ethernet transceivers, which can be used for attaching other Fast Ethernet media such as 100BASE-FX (fiber optic) or 100BASE-T4 (4-wire twisted pair). The MII port is shared with Port 2. If you are using the MII port, then the 10BASE-T/100BASE-TX port labeled 2x cannot be used.
♦ Power Switch Used to turn the switch on (1 position) or off (0 position).
6 3 I NSTALLATION This chapter explains how to unpack and install your DES-2212 Ethernet switch. Unpacking the Switch Open the shipping carton of your hub and carefully unpack the contents. The carton should contain the following items: ♦ One DES-2212 Ethernet/Fast Ethernet switch ♦ One AC power cord ♦ Four rubber feet to be used for shock cushioning ♦ Eight screws and two mounting brackets ♦ This User's Guide Inspect the switch and all accompanying items.
Installing the Switch Location The site where you install the switch may greatly affect its performance. When installing, consider the following factors: ♦ Install the switch in a cool and dry place. See Appendix A, Specifications, for the acceptable temperature and humidity operating ranges. ♦ Install the switch in a site free from strong electromagnetic field generators (such as motors), vibration, dust, and direct exposure to sunlight.
Connecting Power The switch features a power supply unit that automatically adjusts to the level of the input voltage. Supported voltage levels range from 100V to 240V at 50 or 60 Hz. Your local voltage level should fall within this range. To turn on the DES-2212, plug in the provided AC power cord into the power connector at the rear of the system, then flip the rocker power switch to the “1” position. After turning on the power, the Power indicator on the front panel should light.
Replacing the Fuse A 2.0A fuse protects the switch’s power supply unit from power surges. In case of a power surge, the fuse will burn out, thus cutting off the connection and preventing high voltages from reaching the power supply or the other sensitive parts of the device. The fuse, and a spare one, are contained in a fuse case located just beneath the AC power connector. When replacement becomes necessary, pry open this case with a small screwdriver and replace the damaged fuse.
7 4 MAKING N ETWORK C ONNECTIONS This chapter explains how to connect your switch to network stations, to other switches or to Ethernet hubs in your network. 10BASE-T Connection Ports 5 through 12 are 10BASE-T 10Mbps Ethernet ports that you can use to connect the switch to network devices using 10BASE-T shielded or unshielded twisted-pair cable (STP or UTP).
One wire pair should be connected to pins 1 and 2 of the connector, and another wire pair should be connected to pins 3 and 6. Detailed pinout information for 10BASE-T/100BASE-TX connectors can be found in Appendix B. Plug the RJ-45 connector at one end into the network station, and at the other end into a free 10BASE-T port (ports 5 through 12) at the front of the switch.
User’s Guide Ports 1 through 4 are NWay 10/100Mbps ports. When you connect a station to one of these ports, the corresponding port Link/Act LED should light. For 100Mbps connections, the corresponding 100M LED indicator should also light. When connecting to a hub or an Ethernet switch with an MDI-X port, you can use a crossover cable, or you can directly use the Uplink port. You can connect the uplink port directly to a 100BASE-TX Ethernet hub or switch using straight-through cable.
NOTE: 20 Port 2 and the MII port form one logical port. Only one of these ports can be used at any given time.
8 5 U SING THE C ONSOLE I NTERFACE Your DES-2212 Ethernet switch supports a console management interface that allows you to set up and control your switch, either with an ordinary terminal (or terminal emulator), or over the network using the TCP/IP Telnet protocol. You can use this facility to perform many basic network management functions. In addition, the console program will allow you to set up the switch for management using D-View or another SNMP-based network management system.
♦ 8 data bits ♦ No parity ♦ One stop bit You can also access the same functions over the Telnet interface. Once you have set an IP address for your switch, you can use a Telnet program (in a VT-100 compatible terminal mode) to access and control the switch. All of the screens are for the most part identical, whether accessed from the console port or from the Telnet interface. Console Usage Conventions The console interface makes use of the following conventions: 1.
User’s Guide First Time Connecting To The Switch The Switch supports user-based security that can allow you to prevent unauthorized users from accessing the Switch or changing its settings. This section tells how to log onto the Switch. Note: The passwords used to access the Switch are case sensitive; therefore, “S” is not the same as “s.” When you first connect to the Switch, you will be presented with the first login screen (shown below). Figure 6-1.
Figure 6-2. Main Menu for Super User The first user automatically gets super user privileges (See Table 6-1) and is recommended to create at least one Super User for the Switch. Steps to create a Super User or General User: From the screen above, move the cursor to the User Account Change and press Enter, then the User Account Change Menu appears. 1. Choose Create New User from the User Account Change Menu and the Create New User Menu appears. 2. Enter the new user name, and assign an initial password.
User’s Guide available to General Users. The main menus shown are the menus for users with Super User and General User privileges: Figure 6-3. Main Menu for Super User Figure 6-4.
Menu Super User General User Privilege System Config. Yes Yes, view only. TCP/IP Parameter Configuration Yes Yes, view only. Statistic Counters Yes Yes . Port Configuration Yes Yes, view only. Forwarding Table Yes Yes, view only. Custom Filtering Table Yes Yes, view only. Protocol Parameters Yes Yes, view only. STAP Port Parameters Yes Yes, view only. Out-of-Band/ Console Configuration Yes Yes, view only.
User’s Guide establishing a Super User, you are now ready to operate the Switch. Now issue a LOGOFF command from the main menu, the login screen1 appears as follows. Login On The Switch Console By Registered Users Figure 6-5. Login Screen To log in, 1. Type in your user name and press Enter. 2. Type in your password and press Enter. 4 If the Switch is not used within five (5) minutes, the following message appears at the bottom of the console’s main menu: “Console time out press ENTER to continue...
3. With the cursor on the OK selection, press Enter. The main menu screen will be displayed based on your Super User or General User access level or privilege. The following describes the differences between the user privileges. Changing your Password To change your user password: 1. Choose User Account Change from the main menu. 2. Choose Change Password. Figure 6-6. Change Password 3. Type in your user name and press Enter. 4. Type in your old password and press Enter. 5.
User’s Guide 7. Choose EXIT to exit this screen. This method can also be used by a Super User to change another user’s password. Adding and Deleting Users Access to the console, whether using the console port or via TELNET, is controlled using a user name and password. Up to three of these user names can be defined. The console interface will not let you delete the current logged-in user, however, in order to prevent accidentally deleting all of the users with Super User privilege.
3. Enter the new user name, and assign an initial password. Determine whether the new user should have Super User or General User privileges. Figure 6-8. Adding a New User 4. Choose SAVE and press Enter to let the user addition take effect. 5. Choose EXIT to leave the Create New User menu. Deleting a User To delete a user, 1. Choose User Account Change from the main menu. 2. Choose Delete Users from the User Account Change menu. 3. Toggle the Delete field of the user you wish to remove to Yes.
User’s Guide Figure 6-9. Deleting a User 4. Choose SAVE and press Enter to let the user addition take effect. 5. Choose EXIT to leave the Delete Users menu. Setting up the Switch This section describes the settings you will need to change to allow you to be able to manage the switch from an SNMP-based Network Management System such as D-Link’s D-View, or to be able to access the switch using the Telnet protocol.
in-band communication, and the SLIP interface used over the console port for out-of-band communication. Each of the fields on this menu takes effect the next time the system is restarted. Fields that can be set include: ♦ IP Address: determines the IP address used by the switch for receiving SNMP and Telnet communications. Should be of the form xxx.xxx.xxx.xxx, where each xxx is a number (represented in decimal) between 0 and 255.
User’s Guide Figure 6-10. TCP/IP Parameters Configuration Menu Out-of-band management and console settings You can use the Out-of-Band/Console Setting menu to choose whether to use the switch’s RS-232C serial port for console management or for out-of-band TCP/IP communication using SLIP, and to set the bit rate used for SLIP communications. The following fields can be set: ♦ System Restart Out-of-Band Baud Rate: determines the serial port bit rate that will be used the next time the switch is restarted.
♦ System Restart Serial Port Setting: determines whether the serial port should be used for out-of-band (SLIP) management or for console management, starting from the next time the switch is restarted. Figure 6-11. Out-of-Band/Console Setting Menu Software Updates The switch is capable of obtaining its boot-time configuration information, as well as updated versions of its internal firmware, using TFTP (the Trivial File Transfer Protocol) and BOOTP (the BOOTstrap Protocol).
User’s Guide ♦ Boot Server IP Address The IP address of the TFTP server where the configuration file is located. This entry is used only if the S/W Update Control is enabled and your boot protocol is tftp only; if you are using bootp-tftp mode, or if Send BOOTP Request on Power Up is enabled, the address will be obtained from the BOOTP server. ♦ Boot File Name The pathname of the configuration file on your TFTP server. If you are using D-View as your TFTP server, this is the pathname of the .
SNMP requests, allowing these settings to be used for network management purposes. Each of these fields can contain up to 64 characters: ♦ System Name: corresponds to the SNMP MIB II variable system.sysName, and is used to give a name to the switch for administrative purposes. The switch’s fully qualified domain name is often used, provided a name has been assigned. ♦ System Location: corresponds to the SNMP MIB II variable system.
User’s Guide SNMP Traps The switch sends out SNMP traps to network management stations whenever certain exceptional events occur, such as when the switch is powered on or when an SNMP request is made using an unknown community name. The switch allows traps to be routed to up to four different network management hosts. Figure 6-14.
SNMP Security (Community Names) SNMP (version 1) implements a rudimentary form of security by requiring that each request include a community name. A community name is an arbitrary string of characters used as a “password” to control access to the switch. If the switch receives a request with a community name it doesn’t recognize, it will trigger an authentication trap.
User’s Guide Controlling Individual Ports The Port Configuration Menu, accessible from the Network Monitoring menu, allows you to view the status of individual ports and to control their settings. The available settings are: ♦ Port Determines which port is displayed. ♦ Port State This toggle determines whether the port should be enabled or disabled (manually partitioned). Setting the Port State to Disabled will isolate the port from the rest of the network.
You can use the PREPORT and NEXPORT commands to switch to another port. You can also enter the port’s Port ID number. Forwarding Configuration The switch monitors all of the Ethernet segments to which it is connected. Since Ethernet frames include the MAC (Ethernet) address of the originating station, the switch can automatically learn what segment the frame’s destination is connected to, and forward the frame to only that segment.
User’s Guide segment to another. You can control the aging time, the amount of time an entry can be idle before the hub removes it from the forwarding table, by 1. Choose Spanning Tree Algorithm Parameters from the main menu. 2. Choose Custom Filtering Table. 3. Enter the desired age time, in seconds. Occasionally you may want to manually add entries to the switch’s forwarding table. To add an entry for a station, 1. Choose Spanning Tree Algorithm Parameters from the main menu. 2.
5. Set the Status of the entry to Permanent in order to enter and save the settings in the memory of the switch. 6. Choose SAVE to add the entry to the forwarding table. Spanning Tree Protocol and Configuration The DES-2212 implements the IEEE 803.1d Spanning Tree Protocol (STP) to provide the following functions: ♦ Network loop detection and prevention. There should only be one path between any two stations on the network. If there is more than one path, packets will be forwarded in loops forever.
User’s Guide Introduction to Spanning Tree Protocol Parameters The Spanning Tree Protocol works on two levels: the bridge (i.e., switch) and port levels. At the bridge level, the STP algorithm calculates a bridge identifier for each bridge and then determines the root bridge and the designated bridges. On the port level, the spanning tree protocol determines the root port and designated ports. On the bridge level, these terms are used: ♦ Root Bridge The bridge with the lowest-numbered bridge identifier.
A bridge priority ranges from 0 to 65535, with 0 being the highest bridge priority. On the port level, these terms are used: ♦ Root Port. Each bridge has a root port except for the root bridge. This is the port that has the lowest path cost to the root bridge. In case there are several such ports, then the one with the lowest port identifier becomes the root port.
User’s Guide The Spanning Tree Protocol puts all root ports and designated ports in the forwarding state, while placing the others in the blocking state. LAN 1 Switch 1 1 2 LAN 2 Bridge ID = 21 Switch 3 1 2 Bridge ID = 15 Switch 2 1 2 Bridge ID = 30 LAN 3 Setting Spanning Tree Protocol Parameters To set the STP bridge parameters for the switch, 1. Choose Spanning Tree Algorithm Parameters from the main menu. 2. Choose Protocol Parameters from the Spanning Tree Algorithm Parameters menu. 3.
Figure 6-19. Protocol Parameters Menu 4. Choose SAVE and press Enter to let any changes take effect. The status variables shown are: ♦ Time Since Topology Change The last time that changes were made to the network topology, such as might occur when a backup path is activated due to a primary path failure. ♦ Topology Change Count How many times the network bridge topology has changed since the DES-2212 was turned on.
User’s Guide ♦ Forward Delay (sec) Indicates how fast any port on the DES-2212 can change its spanning state when moving towards the forwarding state. This value determines how long the port stays in each of the listening and learning states, which precede the forwarding state.
2. Choose Port Parameters from the Spanning Tree Algorithm Parameters menu. 3. Select the port number that you wish to set parameters for. 4. The Protocol Parameters menu displays the current status of the port concerning the Spanning Tree Algorithm’s operation, and allows you to modify some of the parameters. Figure 6-20. STAP Port Parameters ♦ State Indicates the current state of the port. A port can have the following states: Disabled, Blocking, Listening, Learning, Forwarding, and Broken.
User’s Guide ♦ Designated Bridge Displays the MAC address of the switch/bridge that is the designated bridge for the segment to which the port is attached. ♦ Designated Port This is the port on each designated bridge that is attached to the LAN segment for which the bridge is the designated bridge ♦ Port Path Cost (1–65535) Allows you to specify a path cost for the port. By convention, 10Mbps ports are given a path cost of 100, and 100Mbps ports are given a path cost of 10.
♦ Fragments Counts packets less than 64 bytes with either bad framing or an invalid CRC. These are normally the result of collisions. ♦ Jabber Frames Counts frames with length more than 1518 bytes and with CRC error or misaligned (bad framing). ♦ Collision Counts collisions on the Ethernet segment. ♦ Late Collisions The number of collisions that occurred at or after the 64th byte (octet) in the frame. ♦ Bytes Tx Counts the number of bytes successfully sent from the port.
User’s Guide Figure 6-21. Statistics Counters You can use the PREPORT, and NEXTPORT commands to switch ports. The CLEAR COUNTER command will start all of the counters over at 0. Resetting the Switch You can use the console interface to reset the switch, either doing a System Reset (which restarts the switch and is identical to powering the hub off and back on again) or a Factory Reset (which sets all of the switch’s parameters to what they were when the switch was delivered from the factory).
Figure 6-22. System Reset 2. Move the cursor to Yes to confirm the reset and press Enter. The switch should restart. Factory Reset Before performing a factory reset, be absolutely certain that this is what you want to do. Once the reset is done, all of the switch’s settings stored in NVRAM (including TCP/IP parameters, SNMP parameters, the enabled/disabled settings of ports, security settings, etc.) will be erased and restored to their factory default settings. 1.
User’s Guide Figure 6-23. Factory Reset 2. Move the cursor to Yes to confirm the reset and press Enter. The switch should restart, and all of its parameters will be reset to their default values.
$ 6 P RODUCT S PECIFICATIONS General Standards: IEEE 802.3 10BASE-T Ethernet, IEEE 802.3u 100BASE-TX Fast Ethernet Class II repeater; ANSI X3T9.5 Twisted-Pair Transceiver Topology: Star Protocol: CSMA/CD Network Data Transfer Rate: 10Mbps/100Mbps Number of Ports: 8 10BASE-T ports, 4 10BASE-T/100BASE-TX NWay ports Network Media: 10BASE-T: UTP Cat 3/4/5, 100-ohm unshielded twisted pair (100m max.); 100BASE-TX: UTP Cat 5, 100-ohm unshielded twistedpair (100m max.).
LED Indicators Switch Status LEDs: Power, System Load bar graph Port Status LEDs: 100M, Link/Activity, Full Duplex/Collision Environmental and Physical Power Supply: 100 to 240 VAC, 50 or 60 Hz internal universal power supply Power Consumption: 40 watts max. Dimensions: mountable 441mm × 207mm × 43mm (1U height), 19-inch rack- Weight: approx.
% 7 C ABLES AND C ONNECTORS This appendix describes the pinouts of the switch’s cables and connectors. 10BASE-T/100BASE-TX Connectors Ports 1 through 4 are MDI-X 10BASE-T/100BASE-TX Ethernet ports with NWay capability, allowing them to automatically detect port speed. The Uplink port is identical to Port 1x, except that it has an MDI pinout instead. (You cannot use Port 1x and the Uplink port at the same time.) Ports 5 through 12 are MDI-X 10BASE-T Ethernet ports.
RJ-45 Connectors Contact 1 2 3 4 5 6 7 8 RJ-45 Connector MDI-X Signal MDI Signal RD+ (receive) TD+ (transmit) RD- (receive) TD- (transmit) TD+ (transmit) RD+ (receive) Not used Not used TD- (transmit) RD- (receive) Not used Not used Workstation (MDI) Switch (MDI-X) 1 TD+ RD+ 1 2 TD- RD- 3 6 RD+ RD- TD+ 3 TD- 2 6 Straight-through Cable 58 Cables and Connectors
Crossover Cable When cascading or connecting the hub to another switch, bridge, or hub through the UTP port, a modified crossover cable is necessary. With a crossover cable, two pairs of wires are switched at one connector end. Carry out the following steps to create a customized, crossover twisted-pair cable: 1. Leave one end of the cable as is, with the RJ-45 connector intact. The wiring at just one end of the cable needs to be modified. 2.
Contact 1 2 MII Signal +5 V MDIO 3 MDC 4 RXD<3> 5 RXD<2> 6 RXD<1> 7 RXD<0> 8 RX_DV 9 RX_CLK 10 11 12 RX_ER NOT USED TX_CLK 13 TX_EN 14 TXD<0> 15 TXD<1> 16 TXD<2> 17 TXD<3> 18 19 COL CRS 60 MII Connector Pin Assignment Signal Name Contact MII Signal Voltage 21 +5 V MAC Data 22 --Input Output MAC Data 23 --Clock Receive Data 24 --3 bit Receive Data 25 --2 bit Receive Data 26 --1 bit Receive Data 27 --0 bit Receive Data 28 --Valid Receive 29 --Clock Receive Error 30 --Not Used 31
Contact 20 MII Connector Pin Assignment Signal Name Contact MII Signal Voltage 40 +5 V MII Signal +5 V Signal Name Voltage RS-232 (DB9) Pin Specification The RS-232 serial port of the hub uses a 9-pin female connector. The port can be connected to a VT-100 type terminal, a PC, or a workstation emulating a VT-100 terminal. The connection can be either local, or remote through a modem. For a remote connection, a modem cable with a 9-pin male connector on the hub side is needed.
C on s ole P ort (D C E , D B -9 ) DCD RXD T xD DTR SG DSR RTS CTS - Te rm in a l/P C S e ria l P ort (D T E , D B -2 5) (1 ) (2 ) (3 ) (4 ) (5 ) (6 ) (7 ) (8 ) (9 ) D C D (8 ) R X D (3 ) T xD (2 ) D T R (20 ) S G (7 ) D S R (6 ) R T S (4 ) C T S (5) Local Connection to 25-Pin Serial Port C on s ole P ort C on n e cto r (D C E , D B -9 ) DCD RXD T xD DTR SG DSR RTS CTS - (1) (2) (3) (4) (5) (6) (7) (8) (9) M odem (D C E , D B -9 ) D C D (1 ) R X D (2 ) T xD (3) D T R (4 ) S G (5) D S R (6 ) R T S
C on s ole P ort (D C E , D B -9 ) DCD RXD T xD DTR SG DSR RTS CTS - (1 ) (2 ) (3 ) (4 ) (5 ) (6 ) (7 ) (8 ) (9 ) M odem (D C E , D B -2 5 ) D C D (8 ) R X D (3 ) T xD (2) D T R (2 0 ) S G (7) D S R (6 ) R T S (4) C T S (5 ) Remote (Modem) Connection to 25-Pin Serial Port Cables and Connectors 63
& 8 B OOT C ONFIGURATION F ILE The switch supports a powerful configuration file which allows many of the switch’s configuration parameters to be stored on a centralized server. When the switch starts up, it can be configured to read its configuration file from the server using the TFTP protocol. This can make it easier to manage a large number of switches, since all of the configuration parameters for all of the switches can be managed in a single place.
Takes string as the System Contact, corresponding to the SNMP MIB II variable sysContact. This field is used to give the name and contact information for the person responsible for administering the switch. The string can be up to 64 characters long. ♦ syslocation string Takes string as the System Location, corresponding to the SNMP MIB II variable sysLocation. This field is used to indicate the physical location of the switch for administrative purposes. The string can be up to 64 characters long.
Enables or disables authentication failure traps for invalid SNMP community names. The argument may be enable or disable. ♦ clear-SNMP-comm-table Clears the hub’s SNMP community name table. ♦ SNMP-community community permissions Adds community to the switch’s list of SNMP communities, with access permissions. The community name can be up to 32 characters long. Permissions can be read, for read-only community access, or write, for read-write community access.
9 I NDEX 100BASE-FX, 21, 63 factory reset, 56 100BASE-T4, 21, 63 FDX/Col LEDs, 11 100M LED, 21 feet, rubber, 15, 16 100M LEDs, 11 fiber optic cable, 1 19-inch rack, 16 forwarding table, 2, 43, 44 Adding a New User, 31 Fragments statistic counter, 53 Adding and Deleting Users, 31 front panel, 9 address, Ethernet, 2 full-duplex mode, 2, 11 age time, 44 fuse, 18 brackets, 15 General User, 27 bridge identifier, 46 half-duplex mode, 2 bridge priority, 47 inter-repeater link, 5 broadcast R
port identifier, 47 segments, 6 port path cost, 53 SNMP, 2 port priority, 47, 53 Spanning Tree Protocol, 2, 45 Port State, 52 static filtering, 2 ports, 100Mbps, 10 statistic counters, 53 ports, 10Mbps, 10 store-and-forward, 2 ports, MII, 12 STP.
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