DFE-2600 Series Ethernet/Fast Ethernet Dual-Speed Managed/Unmanaged Stackable Hubs User Guide Rev. 03 (December, 1998) 6DFE2600M.
Trademarks Copyright 1998 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.
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T ABLE OF C ONTENTS 0 ABOUT THIS GUIDE ......................................................... XI Models Covered........................................................................................ xi Conventions .............................................................................................. xi Overview of the User Guide ................................................................ xii 1 INTRODUCTION .................................................................
Dual-Speed Stackable Hubs User’s Guide Module Indicators ...................................................................................17 Port State Indicators ...............................................................................18 SNMP Indicator.......................................................................................19 Port Speed Indicators..............................................................................19 Console Port Indicator (CON) .............................
Out-of-Band Management and Console Settings ..............................................47 Software Update on Boot ..................................................................................48 SNMP Information............................................................................................49 SNMP Traps .....................................................................................................51 SNMP Security (Community Names) ....................................................
Dual-Speed Stackable Hubs User’s Guide 8 SPECIFICATIONS ...........................................................119 General..................................................................................................119 Hub-to-Hub Cascading .........................................................................120 LED Indicators ......................................................................................120 Environmental and Physical......................................................
0 A BOUT T HIS G UIDE This guide discusses how to install and use the DFE-2600 series dual-speed, managed/unmanaged, stackable Ethernet/Fast Ethernet Hubs. Models Covered Unmanaged Models: DFE-2616, DFE-2616x, DFE-2624, DFE-2624x. Managed Models: DFE-2616i, DFE-2616ix, DFE-2624i, DFE-2624ix. All ” models include a switch module in Slot 1 of the rear panel. All ” models are intelligent (that is, anaged”) hubs capable of managing an entire hub stack. All x” models have both features.
Dual-Speed Stackable Hubs User’s Guide Unless differentiated by model number or other specific reference, all information applies to all models. Overview of the User Guide ♦ Chapter 1, Introduction. Provides information on Fast Ethernet networks, and introduces the features of the DFE-2600 series hubs. ♦ Chapter 2, Unpacking and Setup. Helps you get started in setting up the hub. ♦ Chapter 3, Understanding Indicators. Describes all LED indicators on the hub front panel.
1 1 I NTRODUCTION This chapter introduces the DFE-2600 series dual-speed stackable hubs, as well as giving some background information about the technology the hubs use. Product Description The D-Link DFE-2600 series dual-speed stackable Ethernet/Fast Ethernet hubs are designed to allow easy migration and integration between 10Mbps Ethernet and 100Mbps Fast Ethernet, while providing manageability and flexibility in cable connections. The DFE-2600 hubs can operate with either IEEE 802.
Dual-Speed Stackable Hubs User’s Guide In the basic configuration, the 10Mbps and 100Mbps segments are separate and do not intercommunicate. An optional DFE-260S switch module (included with the DFE-2616x, DFE-2624x, DFE-2616ix, and DFE-2624ix) can be installed in any hub in the stack, making it possible to transparently bridge between the 10Mbps and 100Mbps segments.
♦ Full hub stack and network management provided via an SNMP management agent (DFE-2616i, DFE-2616ix, DFE-2624i, DFE-2624ix). ♦ An optional slide-in switch module allows bridging between 10Mbps and 100Mbps segments. Only one switch module is needed per stack, but managed hub stacks can make use of additional switch modules for redundancy. ♦ LED indicators for power, collisions, link, network activity, partitioning status, disable, operating speed (10 or 100Mbps) and network utilization.
Dual-Speed Stackable Hubs User’s Guide Dual-Speed Ethernet Hub Technology Overview Dual-speed Ethernet hubs have been developed to make it simpler to plan networks containing both 10-Mbps Ethernet and 100-Mbps Fast Ethernet technologies, especially when network hosts are being gradually migrated to new Fast Ethernet connections. Ethernet and Fast Ethernet workgroups, also called collision domains, are configured in a star topology where all end-nodes (computers, servers, bridges, etc.
If there is a switching circuit in the hub (or in any hub in a stack), it will serve as a bridge between the two repeaters. 10Mbps Repeater 100Mbps Repeater NWay Detection Switching Circuit RJ-45 Ports 100Mbps Ethernet Station 100Mbps Ethernet Station 10Mbps Ethernet Station 10Mbps Ethernet Station 100Mbps Ethernet Station The switching circuit does not, however join the 10Mbps Ethernet collision domain with the 100Mbps Fast Ethernet collision domain; it only allows them to communicate.
Dual-Speed Stackable Hubs User’s Guide 2 2 U NPACKING AND S ETUP This chapter provides information on the unpacking and initial installation of your hub stack. Unpacking Open the shipping carton of your hub and carefully unpack the contents.
Inspect the hub and all accompanying items. If any item is damaged or missing, report the problem to your D-Link dealer. Identifying External Components This section identifies all the major external components of the hub. Both the front and rear panels are shown, followed by a description of each panel feature. The indicator panel is described in detail in the next chapter.
Dual-Speed Stackable Hubs User’s Guide ♦ LED Indicator Panel Refer to the next chapter, Understanding Indicators, for detailed information about each of the hub LED indicators. ♦ Twisted-Pair Ports Use any of these ports to connect stations to the hub. The ports are MDIX Nway ports, which means you can use ordinary straight-through twisted-pair cable to connect the hub to PCs, workstations, or servers through these ports, and the speed of the connection will be detected automatically.
Rear Panel (Note that the figure shows the rear panel for master models.) ♦ Module Slots Used to install module options for various kinds of additional connections, as well as the DFE-260S 10Mbps/100Mbps bridge module. (In the DFE-2616x, DFE-2616ix, DFE-2624x and DFE-2624ix, module slot 1 is already occupied by the switch module which is standard on these models.
Dual-Speed Stackable Hubs User’s Guide This 9-pin serial connector is used for connecting a console to the DFE2600 series master hubs for out-of-band management of this particular hub or the entire stack. ♦ Fan Provides air circulation and heat dissipation. Be sure to leave adequate space at the rear of the unit for proper ventilation. ♦ AC Power Connector For the power cord. Installing the Hub Installation The site where you install the hub stack may greatly affect its performance.
When installing the hub stack on a level surface, attach the rubber feet to the bottom of each device. The rubber feet cushion the hub and protect the hub case from scratching. Rack Mounting The hub can be mounted in an EIA standard-size, 19-inch rack, which can be placed in a wiring closet with other equipment. Attach the mounting brackets at the hub front panel (one on each side), and secure them with the provided screws. Then, use screws provided with the equipment rack to mount each hub in the rack.
Dual-Speed Stackable Hubs User’s Guide Replacing the Power Supply The hub comes with a removable power supply for easy replacement. In the unlikely event that the power supply fails or is damaged, follow the steps below to replace it: 1. Disconnect the power cord from the AC outlet. 2. Disconnect the power cord from its connector on the rear of the hub. 3. Using a Phillips screwdriver, remove the screws securing the power supply to release the unit. 4.
5. Slide the replacement power supply into the chassis, engaging the connector carefully. 6. Attach the power cord to the connector of the power supply and connect the other end of the power cord to the AC supply source.
3 3 U NDERSTANDING I NDICATORS Before connecting network devices to the hub, take a few minutes to look over this section and familiarize yourself with the front panel LED indicators of your dual-speed hub, depicted below.
Dual-Speed Stackable Hubs User’s Guide DFE-2624 / DFE-2624x Indicator Panel DFE-2616 / DFE-2616x Indicator Panel Hub State Indicators ♦ Power Indicator This indicator lights green when the hub is receiving power; otherwise, it is off. ♦ Collision Indicators (COL10 and COL100) These indicators indicate data collisions on the respective 10Mbps Ethernet or 100Mbps Fast Ethernet segments of the hub.
♦ Segment Utilization % (10Mbps and 100Mbps) The utilization bar graphs provide a quick reference on the current traffic load relative to the total available 10Mbps or 100Mbps network bandwidth. The graphs display a measure of the percentage of bandwidth in use on the respective network segment. All data packets are counted, whether valid or not. ♦ Hub ID Indicator The Hub ID readout shows the ID (group) number of the hub within the hub stack.
Dual-Speed Stackable Hubs User’s Guide Port State Indicators There is one port state indicator for each of the twisted-pair ports on the hub. Each port LED status indicator reports the port link and activity status, and shows whether or not the port has been partitioned. The following describes each indicator and the meaning of each condition: ♦ Link (green) The indicator of a port lights green when the port is connected to a powered Ethernet or Fast Ethernet station.
If there is a DFE-2616i, DFE-2616ix, DFE-2624i, or DFE-2624ix master hub in the stack, then ports can be manually disabled and enabled via the on-board console interface or via an SNMP-based network management program such as D-Link D-View Network Management Program. You can choose to partition a port even when there is nothing wrong with it, for example, to prevent a certain device from accessing the network.
Dual-Speed Stackable Hubs User’s Guide 1. A good connection has been established with a console (for example, a PC or other computer). The diagnostic port of a DFE-2600 series master hub must be connected to the console's RS-232 serial port using a normal serial cable. OR 2. The console computer is on-line and connected to the on-board console program either through terminal emulation or a TELNET session.
4 4 MAKING C ONNECTIONS This chapter discusses how to cascade hubs to create a stack, make connections to the hub twisted-pair and console ports, and link this hub with other hubs (or hub stacks). Hub Cascading/Building a Stack You can stack up to five hubs using the daisy-chain ports located on the rear of the hub to form one logical hub. In this configuration, the interconnected hubs constitute a single repeater, providing a maximum of 120 twisted-pair ports.
Dual-Speed Stackable Hubs User’s Guide Hubs should not be added to the stack or removed from the stack while the power is on to any hub in the stack. Note: 22 Always turn off power to the entire stack before adding or removing hubs.
Connectivity Rules Ethernet (10Mbps) networks have the following connectivity rules: ♦ The maximum length of a twisted-pair cable segment is 100 meters. Cabling should be Category 3 or better. ♦ Between any two end-stations in a collision domain, there may be up to five cable segments and four intermediate repeaters (hubs, hub stacks, or other repeaters).
Dual-Speed Stackable Hubs User’s Guide The Diagnostic Port The diagnostic port on the rear panel of the master hub is used to establish a connection with a device to allow in-band or out-of-band management of the DFE-2600 series hubs stacked with it. The console device connected to the diagnostic port can be a terminal (or a computer running terminal-emulating software) or a PC running TCP/IP TELNET. Diagnostic Port Connection The diagnostic port is an RS-232 DCE interface.
you can use a TELNET program (in a VT-100 compatible terminal mode) to access and control the hub. All of the screens are for the most part identical, whether accessed from the diagnostic port or from TELNET. A console device can manage a DFE-2600 series master hub operating in a stack master or stand-alone master role. Use the on-board console program for out-of-band management or D-View (included with DFE-2600 series master hubs) for in-band or out-of-band management.
Dual-Speed Stackable Hubs User’s Guide connections require either a Category 5 UTP cable or an STP cable. These cables can be up to 100 meters long. Each Ethernet connection requires a Category 3 or better UTP cable and can also be up to 100 meters long. It is recommended that you use Category 5 cabling for all connections, in order to make it easier to transition all stations to 100Mbps.
Hub-to-Hub Uplink You can link two hubs or hub stacks to each other using any of the normal twisted-pair (1x - 24x) ports or the Uplink port. Linking hubs using normal twisted-pair ports requires crossover twisted-pair cables; linking using one normal twisted-pair port and the Uplink port requires an ordinary straightthrough twisted-pair cable. The Uplink port is shared with Port 1 and they cannot be used at the same time.
Dual-Speed Stackable Hubs User’s Guide DEVICE PORT USED DEVICE BEING CONNECTED PORT TYPE Normal Crossover (X) Normal Hub or Switch Uplink Straight-Through (||) Hub Server (or PC) Uplink Hub or Switch CABL E TO USE Straight-Through (||) Normal Straight-Through (||) Uplink Crossover (X) Server (or PC) Crossover (X) A crossover cable is a twisted-pair cable in which the wires have been crossed.
tion on each hub is 100 meters, then the hub-to-hub connection is limited to 5 meters. However, if the longest hub-to-end-station connection is less than 100 meters, then the hub-to-hub connection can be up to 100 meters long. Almost any variation of cable lengths are possible as long as each segment is shorter than 100 meters and the total network diameter does not exceed 205 meters. The DFE-2600 are dual-speed hubs capable of operating at both 10Mbps (Ethernet) and 100Mbps (Fast-Ethernet).
Dual-Speed Stackable Hubs User’s Guide Module Installation The installation procedure for each module is the same. Additional information about each module is provided below. To install any of the modules: 1. Locate one of the module slots in the hub rear panel. (Note that the DFE-260S module can only be installed in Slot 1 - the center slot.) 2. Using a screwdriver, undo the two screws and remove the dust cover on the module slot. 3.
Switch Module (DFE-260S) The DFE-260S switch module is used to allow interconnection between the 10Mbps and 100Mbps segments in the hub or hub stack. Each hub stack should have one DFE-260S module (such as the one included in the DFE2616x, DFE-2616ix, DFE-2624x or DFE-2624ix) to allow 10Mbps and 100Mbps stations to intercommunicate. Note that the DFE-260S module can only be installed in Slot 1 – the center slot.
Dual-Speed Stackable Hubs User’s Guide • Power/Tx his LED is lit when the hub is on and blinks when packets are being transmitted by the module. • Link/Rx his LED is lit when the fiber optic ports are properly connected to a powered-on device and blinks when packets are being received by the module. • Collision his LED blinks when there are packet collisions on the fiber optic link. • FDX his LED is lit when the fiber optic port is set for Full Duplex transmit and receive.
The Fast Ethernet module uses a MDI-X connector (not a straight MDI) and, therefore, a crossover cable must be used when connecting the module to another module (and under most other circumstances). See Appendix A for pinout information. The Fast Ethernet module includes the following LED indicators: • Power/Tx his LED is lit when the hub is on and blinks when packets are being transmitted by the module.
Dual-Speed Stackable Hubs User’s Guide erate at 100Mbps in the duplex mode selected. The duplex mode DIP switch allows you to set the port to Full Duplex mode operation. Only the right-hand switch (number 2) is active. Use the DIP switch to set the duplex mode.
5 5 MASTER H UB S ETUP AND M ANAGEMENT The DFE-2616i, DFE-2616ix, DFE-2624i, and DFE-2624ix master hubs (hereafter and elsewhere referred to as, FE-2600 series master hubs”) provide an on-board console program that allows you to set up and control all DFE-2600 hubs stacked with it. This program can be accessed either with an ordinary terminal (or terminal emulator) or over the network using the TCP/IP TELNET protocol. You can use this program to perform many basic network management functions.
Dual-Speed Stackable Hubs User’s Guide Navigation and Conventions This section describes how to navigate the master hub management software and the conventions used in that software. Navigation The Tab keys move the cursor from field to field. Note that they are unidirectional (i.e., Shift-Tab is not a functional combination). Up and Down arrow keys allow cursor movement between some fields. The Spacebar is a toggle switch for all variables that can be changed but wherein possible values are preset.
In-Band Setup Instructions This section describes how to setup the hub for in-band management. Getting Started Physically install and cascade the hubs and power on the hub stack according to the directions in other parts of this manual. At this point, the hub stack is ready for use as an ordinary unmanaged repeater. The master hubs in the series come without IP addresses assigned (IP = 0.0.0.0).
Dual-Speed Stackable Hubs User’s Guide 1. Connect a VT-100 compatible terminal or a personal computer running a VT-100 compatible terminal emulation program to the DB-9 console port at the rear of the master hub. The cable should be an ordinary RS-232C cable. The terminal communications parameters should be set to 9600bps, 8 bits, no parity, and 1 stop bit. 2. Turn on hub. 3. As the hub begins its boot process, hit Control-C to enter the PROM System Menu. 4.
installed. If a hub stack has two master units, the master unit powered-on first or the unit which is higher in the stack will manage the stack and be designated the rimary Master.” Master hubs in the series include a built-in contention algorithm which determines which hub will manage the stack and which will operate in standby mode.
Dual-Speed Stackable Hubs User’s Guide The figure above shows an unsegmented hub stack. All hubs in the stack are in the same collision domain because they are connected together through the daisy-chain ports. The figure below shows a stack divided into three separate collision domains. Hubs three and four are isolated from the main segment (collision domain one) using the hub's segmentation capability, putting them into their own isolated collision domains two and three respectively.
For information about segmenting hubs using the network management module for the hub, see the ub Stack Management: Controlling Hubs in the Hub Stack” section later in this chapter. NOTE: Hub segmentation is controlled by the master hub. When the master hub completes its initialization, it will restore any prior segmentation of the hubs. Therefore, if you are using a switch or bridge to join different segments, be sure to enable the IEEE 803.
Dual-Speed Stackable Hubs User’s Guide DFE-2600 Dual speed Stackable Hub Telnet Remote Management Ver0 Copyright(C) 1995-96 D-Link Corp. User Name Password [ [ ] ] OK CLOSE CONNECTION To log in, complete these steps: 1. Type in your user name and press . 2. Type in your password and press . 3. With the cursor on the OK selection, press . NOTE: When the hub is shipped, the default user name is D-Link, and the default password is also D-Link.
DFE-2600 Stackable Hub - Main Menu System Configuration TCP/IP Parameters Configuration Network Monitoring Out-of-Band/Console Configuration User Account Change SNMP Trap Manager Configuration SNMP Manager Configuration System Reset Software Update Factory Reset NV-RAM to Default Value LOGOFF Changing Your Password To change your user password, follow these steps: 1. Choose User Account Change from the main menu. 2. Select Change Password.
Dual-Speed Stackable Hubs User’s Guide DFE-2600 Stackable Hub - User Account Change : Change Password User Name Old Password [ [ ] ] New password [ Confirm Password [ ] ] HELP SAVE EXIT 3. Type in your user name and press . 4. Type in your old password and press . 5. Type in the new password you have chosen, and press . Type in the same new password again in the next blank space to verify what you typed. 6. Choose SAVE to put the new password into effect. 7.
Setting Up the Master Hub This section describes how to set the hub console parameters for the various management options it supports. Note that the hub can be managed inband or out-of-band, and either through the built-in console program, or using an SNMP-management program such as D-View. TCP/IP Settings The hub needs to have an IP address assigned to it so that the network management system or TELNET client can communicate with it over the network.
Dual-Speed Stackable Hubs User’s Guide be 255.0.0.0 for a Class A network, 255.255.0.0 for a Class B network, and 255.255.255.0 for a Class C network. ♦ Default Gateway. This parameter specifies the IP address for a gateway or a router where frames with destinations outside the current subnet should be sent. If your network is not part of an internetwork, or you do not want the hub to be accessible outside your local network, you can leave this field blank. ♦ Send BOOTP Request Upon Power Up.
Out-of-Band Management and Console Settings You can use the Out-of-Band/Console Setting menu to choose whether to use the hub RS-232 serial port for console management or for out-of-band TCP/IP communication using SLIP, and to set the baud rate used for SLIP communications. The following fields can be set: ♦ System Restart Out-of-Band Baud Rate. This parameter determines the serial port baud rate that will be used the next time the hub is restarted.
Dual-Speed Stackable Hubs User’s Guide DFE-2600 Stackable Hub - Out-of-Band/Console Setting Menu Out-of-Band Setting Protocol: Baud Rate: Character Size: Stop Bit: Console Setting: SLIP 9600 8 1 Baud Rate: Character Size: Stop Bit: 9600 8 1 System Restart Out-of-Band Baud Rate <9600 > Out-of-Band Dial Up Phone Number [ ] Current Serial Port Setting: Console System Restart Serial Port Setting EXIT Software Update on Boot The hub is capable of obtaining its boot-time configuratio
♦ Boot Server IP Address. This variable is 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 .
Dual-Speed Stackable Hubs User’s Guide requests, allowing them to be used for network management purposes. Each of these fields is restricted to 64 characters: ♦ System Name. This parameter corresponds to the MIB-II object sysName, and is used to assign a name to the hub for administrative purposes. The hub domain name is often used, provided a name has been assigned. ♦ System Location.
SNMP Traps The hub sends out SNMP traps to network management stations whenever certain exceptional events occur, such as when the hub is powered on or when an SNMP request is made using an unknown community name. An SNMP trap sent to another network management site provides a warning about, for example, an attempted unauthorized access to the network or hub, or changes to a network hub configuration that may effect other parts of the network. Traps are sent only to selected network management hosts.
Dual-Speed Stackable Hubs User’s Guide ♦ Status. This determines whether this trap entry is valid or invalid. You can delete an entry by changing its status to Invalid. 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 assword” to control access to the hub.
Adding and Deleting Users Access to the console program, whether using the diagnostic port or TELNET, is controlled by user names and passwords. Up to three user names can be defined. One user, named D-Link, is defined by default; this user name can be removed if desired. However, the console program will not let you delete the currently logged-in user to prevent you from accidentally deleting all users with Super User privileges – making it impossible to change important hub settings.
Dual-Speed Stackable Hubs User’s Guide 3. Enter the new user name, and assign an initial password. Determine whether the new user should have Super User or General User privileges. DFE-2600 Stackable Hub - User Account Change : Create New User User Name Password Confirm Password [ [ [ ] ] ] Access Level SAVE EXIT 4. Choose SAVE and press to let the user addition take effect. 5. Choose EXIT to leave the Create New User menu.
3. Toggle the Status field of the user you wish to remove to N/A. (To temporarily restrict a user access to the hub console, you can toggle that user Status to Inactive.) DFE-2600 Stackable Hub - User Account Change : Delete Users User Name admin D-Link Access Level Status > > SAVE Delete EXIT 4. Choose SAVE and press to let the user deletion take effect. 5. Choose EXIT to leave the Delete Users menu.
Dual-Speed Stackable Hubs User’s Guide DFE-2600 Stackable Hub - Network Monitoring : Primary/Backup Master Menu Group ID 1 Status Primary Master IP Address 210.68.85.51 MAC Address 0080C8112202 EXIT Hub Stack Management Several important hub parameters useful in the day-to-day management of the hub can be viewed and controlled using the Group Configuration and Port State menus.
♦ Group ID. This field indicates which hub is being displayed. ♦ Group Serial Number. Displays the hub number. factory assigned serial ♦ Group Position Number. Displays the hub stack position relative to the other hubs (1 is the highest in the stack, 5 the lowest). ♦ Group Description. This field gives a description of the given hub, showing its model number. ♦ Group Role. Shows what role the hub is currently playing in the hub stack (primary master, standby master, or slave). ♦ Group Port Capacity.
Dual-Speed Stackable Hubs User’s Guide hh:mm:ss.xx, with hh representing hours since the master hub was turned on, mm the minutes, ss the seconds, and xx representing 100ths of a second. ♦ Group Slot (1). Shows the status of module slot 1. If there is a module installed in slot 1, this field will display: MII, TP, FX, or Switch as determined by the type of module installed. If there is no module installed, the field will display one.” ♦ Group Slot (2). Shows the status of module slot 2.
You can use PREV GROUP and NEXT GROUP to display information about another hub, or you can enter the hub Group ID number directly in the Group ID field. Controlling Individual Ports The Port State Menu, accessible from the Network Monitoring menu, allows you to view the status of individual ports and control their settings. The information displayed includes: ♦ Group ID. This field determines which hub ports are displayed. ♦ Port ID. This field determines which port is displayed. ♦ Connector Type.
Dual-Speed Stackable Hubs User’s Guide ♦ Port Speed. This field displays the port current operating speed (100M or 10M) relative to the speed of the device connected to it. ♦ Speed Capability. This field displays the port current speed setting, Auto for auto-detect/correct, 100M for 100Mbps connections only, or 10M for 10Mbps connections only. This variable is user configurable.
Displaying Port and Group Statistics The hub stack collects network transmission statistics for each port, and each hub (group) in the stack. Statistics collected for segments are tabulated differently and are explained in the next section. You can choose which to view from the Statistics menu, accessible under the Network Monitoring menu.
Dual-Speed Stackable Hubs User’s Guide frame delimiter is valid but less than 2 bytes are received. This type of error may indicate noise on the line. ♦ Late Events. This statistic counts collisions that occur at or after the 64th byte (octet) in the frame. A high count here may indicate that delays on your Ethernet are too long, and you have either exceeded the repeater count or cable length specified in the Fast Ethernet standard. ♦ Runt Frames.
♦ SA Changes. This statistic counts the number of times the source address has changed. ♦ Isolates (only for 100Mbps connections). Counts the number of times a port auto isolates. ♦ SymbolError (only for 100Mbps connections). Counts the number of times a received packet contained symbol errors. Only one symbol error is counted per packet regardless of the number of symbol errors within the packet. ♦ Total Errors.
Dual-Speed Stackable Hubs User’s Guide NOTE: The CLEAR COUNTER action only resets the counters for the statistics display; the underlying counters (i.e., MIB variables) are not cleared. Displaying Segment Statistics The hub stack collects network transmission statistics for each segment in the stack. You can choose to view them from the Statistics menu, accessible under the Network Monitoring menu. ♦ StatsPkts.
DFE-2600 Stackable Hub - Network Monitoring : Segment Statistics Current Segment ID: 1 Pkts StatsPkts: 474996 BroadcastPkts: 284057 MulticastPkts: 6884 CRCAlignErrors: 47 UndersizePkts: 0 OversizePkts: 0 Fragments: 677 Jabbers: 1 Collisions: 673 Pkts/Sec 0 0 0 0 0 0 0 0 0 64 Octs: 65-127 Octs: 128-255 Octs: 256-511 Octs: 512-1023 Octs: 1024-1518 Octs: Pkts 51790 114508 215763 12529 4197 75747 Pkts/Sec 0 0 0 0 0 0 StatsOctets: Total Octs: Octs 187814091 191996500 Octs/Sec 0 0 Next Monitoring Segment
Dual-Speed Stackable Hubs User’s Guide ♦ 1024-1518 Octs. This statistic displays the number of packets (both good and bad) that were 1024 - 1518 octets long. ♦ StatsOctets. This statistic displays the number of data octets including those in bad packets and octets in FCS fields but does not include preamble or other framing bits. ♦ Total Octs. This statistic displays the total number of octets contained in valid frames received on this segment.
Per-Port Intrusion Security Each port on this hub can have intrusion security enabled. Intrusion security prevents unauthorized individuals from accessing the network. Through the network management software, Ethernet addresses that represent authorized users can be assigned to each hub port. If a packet using a source address other than those used by authorized users is received by a port, the port is disabled and the network manager is notified.
Dual-Speed Stackable Hubs User’s Guide DFE-2600 Stackable Hub - Network Monitoring : Bridge Information Hub ID Bridge Present Bridge Status 1 2 3 5 Bridge N/A N/A N/A Enable Disable Disable Disable EXIT Resetting the Hub You can use the console program to reset the hub stack, either doing a system reset (which restarts the hubs and is identical to powering them off and back on again) or a factory reset (which resets the master hub, reverts all of its parameters back to their factory default values,
If the hub stack has a backup master, the time required to complete the reset process will be longer than without one. Generally, a stack reset should be complete within about two minutes. System Reset To perform a system reset, follow these steps: 1. Choose System Reset from the main menu. The following confirmation message will appear: DFE-2600 Stackable Hub - System Reset Are you sure you want to reset? No Yes 2. Move the cursor to Yes to confirm the reset and press .
Dual-Speed Stackable Hubs User’s Guide (including TCP/IP parameters, SNMP parameters, the enabled/disabled settings of ports, etc.) will be erased and restored to their factory default settings. 1. Choose Factory Reset NVRAM to Default Value from the main menu. A confirmation message similar to that for the System Reset will appear. 2. Move the cursor to Yes to confirm the reset and press .
6 6 W EB -B ASED N ETWORK MANAGEMENT Introduction The content of this chapter pertains to intelligent (master) hub models only. These hubs have the ’ designation in their model numbers and include the DFE-2616i, DFE-2616ix, DFE-2624i and the DFE-2624ix. An embedded web-based (hypertext) interface allows users to manage the hub from anywhere on the network through a standard browser such as Netscape Navigator/Communicator or Microsoft Internet Explorer.
Dual-Speed Stackable Hub Web-based Management User’s Guide Getting Started The first step in getting started in using web-based management for your Hub is to secure a web-browser. A web-browser is a program which allows a person to read hypertext, for example, Netscape Navigator or Microsoft Internet Explorer. Follow the installation instructions for the browser. The second and last step is to configure the IP interface of the Hub.
• • Clicking on the Hub ID indicator shows information about the hub and allows you to take it offline. Slots 1 & 2 Clicking on one of the Slot indicators, if it is occupied by a fiber optic or Fast Ethernet expansion module or console, shows a status and configuration window for that device. Port Clicking on one of the Ports opens a configuration window for that particular port. Individual items in the above mentioned configuration windows are discussed in the Fault - Group/Port Control section below.
Dual-Speed Stackable Hub Web-based Management User’s Guide Items in the Hub Information window are described as follows: ♦ System Description ♦ System OID ♦ System Uptime ered on. ♦ System Contact Name of the person to contact should there be any problems / questions with the system. ♦ System Name ♦ System Location of the hub. ♦ Runtime Software Version downloadable software. ♦ PROM Firmware Version Version number for the firmware chip.
♦ Hardware Revision Revision number for the hub hardware. IP Interface The IP Interface screen displays information about each interface to the device. The information is described as follows: ♦ IP Address ♦ Subnet Mask the hub is on. ♦ Default Gateway ♦ MAC Address The ethernet address for the device. ♦ Interface Type The media protocol. The Internet address for the device. The subnet mask determines the level of the subnet that The default router for the device.
Dual-Speed Stackable Hub Web-based Management User’s Guide Trap Receivers Defining Trap Receivers allows network management stations to be notified when exceptional events happen. ♦ IP Address This is the address of the network station that should receive traps from the hub stack. ♦ Community This is the SNMP community name to authenticate the receiving of traps. ♦ Delete This will remove a trap receiver from the trap receiving table.
♦ Community String ♦ Access Right ♦ Delete A user-defined SNMP community name. The permitted access using the SNMP community name. Click this to delete the community name. Software Download The Software Download screen allows you to cause an immediate update of the hub parameters and/ or firmware.
Dual-Speed Stackable Hub Web-based Management User’s Guide The fields are described as follows: ♦ Software Update Mode Set to either network or out-of-band. Determines whether the configuration file should be obtained through the Ethernet network or through the console port. ♦ Software Update Control Determines whether or not the Hub should download its configuration file the next time the Hub is booted. ♦ Boot File The path and configuration file name on the TFTP server.
Performance Hub performance is measured with packet statistics and it utilization in the network. Clicking on the Performance button and then choosing either the Statistics or Utilization options on the left causes a representation of your hub to be shown (see example below). Click on any feature of the representation to see Statistics or Utilization figures about it. Statistics The Hub allows you to collect network statistics on individual ports, 10Mbps segments (Seg. 1), 100Mbps segments (Seg.
Dual-Speed Stackable Hub Web-based Management User’s Guide Statistics collected by the Hub are described as follows: ♦ StatsPkts (Pkts) ♦ BroadcastPkts (Pkts) stations on the network. ♦ MulticastPkts (Pkts) Ethernet addresses. ♦ CRC AlignErrors (Pkts) Counts otherwise valid frames that did not end on a byte (octet) boundary. ♦ UndersizePkts (Pkts) Counts packets received that were less than 64 octets long (excluding framing bits, but including FCS octets) and were otherwise well formed.
♦ OversizePkts (Pkts) Counts packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets) and were otherwise well formed. ♦ Fragments (Pkts) Counts packets received that were less than 64 octets in length (excluding framing bits but including FCS octets) and had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Errors).
Dual-Speed Stackable Hub Web-based Management User’s Guide Utilization A network segment can be monitored using the Utilization display. Each hub is divided into two segments; 100Mbps (segment 1) and the 10Mbps (segment 2). When you choose a segment to observe, a graph appears showing the usage of that segment as a percentage of the total bandwidth (see example below). Utilization is calculated and plotted every 10 seconds. A one hour utilization history can be shown by the graph.
Group/ Port Control Click on the Group/Port Control button on the left side of the screen to show your hub or stack on the screen. On the stack, simply click on any item you wish to configure, including an individual port, a hub (by clicking on the Hub ID number), the console and the switch (see the example below). Port Configuration Clicking on any twisted-pair port will show the current configuration information of the port.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Port Type cabling. ♦ Link Status Indicates whether the port is online and working (link up) or not (link down). ♦ Auto Partition Status Indicates whether the port has been auto-partitioned and taken offline or not. ♦ Speed ♦ Polarity Status ♦ Link Test Function State Indicates whether the port link-test is enabled or disabled.
♦ Generate Trap When Link State Change Indicates whether or not the port will send a trap if it link status changes. ♦ Generate Trap When Speed State Change the port will send a trap if it speed changes. Indicates whether or not Group (Hub) Configuration Clicking on a Hub ID number will show the current configuration information for that Hub.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Group Role The role of the Hub within the stack, either primary-master, backup-master, or slave. ♦ Hardware Revision in this Hub. ♦ Status ♦ Last Operation Status Change Time of the last status change for the Hub. A status change occurs when the Hub goes online or offline. ♦ Isolated/ Reconnected Group the Hub to the hub stack. The version of the repeater hardware board used Tells whether the Hub is up (online and working) or down.
The information is described as follows: ♦ Current Serial Port Setting sole or Out-of-band. ♦ System Restart Serial Port Setting You can choose to select Console or Out-of-band management upon reboot. ♦ Baud Rate Defined in cps (characters per second), it shows the connection speed between the Hub and the console. ♦ Character Size This is the number of bits in the byte unit of the information exchange between Hub and console manager.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Protocol This is the protocol used by the Hub for out-of-band (dial-up) management. ♦ System Restart Out-of-Band Baud Rate on the Hub. ♦ Out-of-Band Dial Up Phone Number ber here for reference.
♦ Administration State abled or disabled. Indicates the port partition status, either en- Reset Doing a remote reset is equivalent to turning the hub off and on again. All parameters are returned to the values stored in EEPROM. Click RESET to reset the Hub. User The User menu allows you to monitor and configure a number of settings for individual ports. User List Clicking on the User List option on the left side of the screen displays a representation of your hub stack.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Source Address Shows the source Ethernet address of the frame as received by the hub. ♦ Time Shows the amount of time since the last packet was transmitted on the port in terms of System Uptime (SysUpTime). Intrusion To display this screen, click User, then Intrusion. The Hub intrusion security feature can be used to dedicate a port to a given piece of hardware.
Variables in the above window include: ♦ Hub ID ♦ Port ♦ Authorized MAC Address This is the Ethernet (MAC) address of the station allowed to use this port. ♦ Detected MAC Address This is the Ethernet (MAC) address of the last frame received by the port. ♦ Attribute ♦ Action The action to be taken in event of intrusion on the port: send trap, partition, send trap & partition, or no action. ♦ Auto Learn ♦ Delete Select a Hub from the hub stack. Port ID for which Intrusion is enabled.
Dual-Speed Stackable Hub Web-based Management User’s Guide Back-Up Port A Back-Up Port is a linked-pair consisting of a master port and a back-up port. The back-up port is immediately enabled should the master port fail. If the master port returns (from failure), the back-up link traffic is switched back to the master link. A maximum limit of 3 back-up are allowed per Hub. ♦ Hub ID ♦ Master/ Back-Up Port pair.
RMON utility viewer provides you with functionality through an easy-to-use interface especially designed for management of RMON compliant devices. Network management works by placing a small degree of intelligence into network devices (routers, bridges, hubs, NIC , etc.) to be managed. This intelligence takes the form of an agent that is capable of collecting statistics and status information, as well as performing control operations that affect the operation of the network.
Dual-Speed Stackable Hub Web-based Management User’s Guide Event previously configured thresholds. If the monitored variable crosses a threshold, an event is generated. A hysteresis mechanism is implemented to limit the generation of alarms. Controls the generation and notification of events from this device. RMON is an industry accepted standard for performance monitoring of remote LANs.
The above Statistics table must contain at least one entry to begin keeping statistics. To add a new entry into the Statistics group, simply fill in the 3 fields - Index, Data Source and Owner, and then click on the Add button (see explanations below). • Index (1..65535) This value uniquely identifies an entry. Other than numerical position in the Statistics Table, there is no benefit or disadvantage in choosing a specific index value. • Data Source ifIndex.
Dual-Speed Stackable Hub Web-based Management User’s Guide Statistics Group Index Table The Statistics Group Index Table is a collection of statistics kept for a particular Ethernet interface. It consists of 17 statistic counters and shows the absolute value of the count. The absolute value represents the current count since the initiation of the data source or last reset, at which the counter begins at zero. Clicking on the Refresh button resets the counter.
♦ Broadcast Packets The total number of good packets received that were directed to the broadcast address. Note that this does not include multicast packets. ♦ Multicast Packets The total number of good packets received that were directed to a multicast address. Note that this number does not include packets directed to the broadcast address.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ 64 Octets The total number of packets (including bad packets) received that were 64 octets in length (excluding framing bits but including FCS octets). ♦ 65-127 Octets The total number of packets (including bad packets) received that were between 65 and 127 octets in length inclusive (excluding framing bits but including FCS octets).
To begin keeping device history Add a new data source entry by filling in the 5 boxes at the bottom of the window and clicking Add. It is sufficient to click OK/ Cancel (as appropriate) or edit any of the five fields displayed: • Index (1..65535) The value uniquely identifies this entry. Other than numerical position in the Control Table, there is no benefit or disadvantage in choosing a specific index value. • Data Source ifIndex.
Dual-Speed Stackable Hub Web-based Management User’s Guide • Interval (1..3600) The interval in seconds over which the data is sampled for each bucket. This interval can be set to any number of seconds between 1 and 3600 (1 hour). Other functions in the History Control Table are: ◊ Delete ◊ View To view statistics on an entry, click the View button. Statistics are organized in a table (shown below). Click the Delete button to remove an entry.
val. Note that this number is not necessarily the number of packets dropped, it is just the number of times this condition has been detected. ♦ Octets The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets). ♦ Packets The number of packets (including bad packets) received during this sampling interval.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Jabber The number of packets received during this sampling interval that were longer than 1518 octets (excluding framing bits but including FCS octets), and had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error). Note that this definition of jabber is different than the definition in IEEE-802.3 section 8.2.1.5 (10BASE5) and section 10.3.1.
◊ Delete Click the Delete button to remove an entry. Following are descriptions for the categories shown in the Alarm Table: ♦ Owner The entity that configured the entry and is therefore using the resources assigned to it. ♦ Index An index uniquely identifying an entry in the alarm table. Each such entry defines a diagnostic sample at a particular interval. ♦ Interval The interval in seconds over which the data is sampled and compared with the rising and falling thresholds.
Dual-Speed Stackable Hub Web-based Management User’s Guide ♦ Rising Threshold A threshold for the sampled statistic. When the current sampled value is greater than or equal to this threshold, and the value at the last sampling interval was less than this threshold, a single event will be generated. After a rising event is generated, another such event will not be generated until the sampled value falls below this threshold and reaches the Alarm Falling Threshold.
• Index: This value uniquely identifies the Alarm entry. Other than numerical position in the Alarm Table, there is no benefit or disadvantage in choosing a specific index value. • Owner The entity that configured the entry and is therefore using the resources assigned to it. • Segment ID The segment of the network to sample data from. Segment 1 is the 100Mbps segment and Segment 2 is the 10Mbps segment. • Variable The object identifier of the particular variable to be sampled.
Dual-Speed Stackable Hub Web-based Management User’s Guide • Sample Type The method of sampling the selected variable and calculating the value to be compared against the thresholds. If the value of this object is Absolute, the value of the selected variable will be compared directly with the thresholds at the end of the sampling interval.
same as an Event index number identified in the Event group. If there is no corresponding entry in the Event Table, then no association exists and no event will be generated. In particular, if this value is zero, no associated event will be generated, as zero is not a valid event index number. Event The Event Group controls the generation and notification of events. Each entry in the Event Table describes the parameters of the event that can be triggered.
Dual-Speed Stackable Hub Web-based Management User’s Guide The event variables are described below: ♦ Index An index number that uniquely identifies an entry in the event table. Each such entry defines one event that is to be generated when the appropriate conditions occur. ♦ Owner The entity that configured this entry and is therefore using the resources assigned to it. ♦ Description ♦ Type The type of notification that the probe will make about the event.
◊ View To view the event log, click the View button. Log entries are organized in a table (shown below). Log Table for Event Index The Event Log Table is generated and maintained by an Event entry in the Event Table and can not be manipulated by any other entity. Log entries are described by the following: ♦ Index ♦ Description log entry. ♦ Log Time An index number that uniquely identifies an event.
A 7 C ABLES AND C ONNECTORS 100BASE-TX Ethernet Cable and Connectors ♦ Cable characteristics: 0.4 to 0.
Dual-Speed Stackable Hub Web-based Management User’s Guide Straight Twisted-Pair Cable Pinouts Contact MDI-X Signal MDI Signal 1 RD+ (receive) TD+ (transmit) 2 RD- (receive) TD- (transmit) 3 TD+ (transmit) RD+ (receive) 4 Not used Not used 5 Not used Not used 6 TD- (transmit) RD- (receive) 7 Not used Not used 8 Not used Not used Crossover Cables When cascading or connecting the hub to another switch, bridge, or hub through the UTP port, a modified crossover cable is necessary.
Diagnostic Port Specifications This section provides supplemental information that concerns diagnostic port connections. Information on RS-232 DB-25 connectors is provided for connections with 25-pin console devices. 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 terminal, a PC, or a workstation emulating a VT-100 terminal.
Dual-Speed Stackable Hub Web-based Management User’s Guide C o n so le P o rt (D C E , D B -9 ) DCD RXD T xD DTR SG DSR RTS C TS - (1 ) (2 ) (3 ) (4 ) (5 ) (6 ) (7 ) (8 ) (9 ) C onsole P o rt (D C E , D B -9 ) DCD RXD T xD D TR SG DSR R TS C TS - 114 (1 ) (2 ) (3 ) (4 ) (5 ) (6 ) (7 ) (8 ) (9 ) Te rm in a l/P C S e ria l P o rt (D T 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 (7 ) C T S (8 ) - (9) Term inal/P C S eria l P ort (D TE , D B -25) D C D (8 ) R X D (3
B A B OOT C ONFIGURATION F ILE DFE-2600 series master hubs support a powerful configuration file which allows many of the hub stack configuration parameters to be stored on a centralized server. When the master hub 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 hub stacks, since all of the configuration parameters for all of the hubs can be managed in a single place.
Dual-Speed Stackable Hub Web-based Management User’s Guide Takes string as the System Contact, corresponding to the SNMP MIBII object sysContact. This field is used to give the name and contact information of the person responsible for the hub. The string can be up to 64 characters long. ♦ syslocation string Takes string as the System Location, corresponding to the SNMP MIB-II object sysLocation. This field is used to indicate the physical location of the hub for administrative purposes.
♦ auth-trap enable/disable Enables or disables authentication failure traps for invalid SNMP community names. The argument for this field is either enable or disable. ♦ clear-SNMP-comm-table Clears the hub SNMP community name table. ♦ SNMP-community community permissions Adds a community to the hub list of SNMP communities, with access permissions. Four entries is the maximum allowed. The community name can be up to 32 characters long.
Dual-Speed Stackable Hub Web-based Management User’s Guide Sets the hub node age timer to n seconds. Node aging is used with the hub security option to determine how long to keep entries in the node tracking table.
C 8 S PECIFICATIONS General Standards: IEEE 802.3 10BASE-T Ethernet repeater, IEEE 802.3u 100BASE-TX Fast Ethernet repeater (Class II); ANSI X3T9.
Dual-Speed Stackable Hub Web-based Management User’s Guide Hub-to-Hub Cascading Number of Daisy-Chained Hubs: Maximum of 5 hubs per stack Daisy-Chain Port: MiniSCSI-type connector × 2 Daisy-Chain Cable: SCSI-type cable (supplied) LED Indicators Hub Status: Power, 10Mbps collision, 100Mbps collision, 10Mbps utilization, 100Mbps utilization, module link Port Status (per port): Link/Activity, Auto Partition/Manual Partition, Speed (10/100Mbps) Environmental and Physical Power Supply: 100 to 240 VAC, 50 or 6
DFE-2624i = 39 watts maximum DFE-2624ix = 40 watts maximum Dimensions: 441mm × 237mm × 55mm (1.25 U height), 19-inch rack-mountable Weight: 3.87kg (8.53 lbs.
D 9 G LOSSARY Please note that the terms in this glossary are defined according to their usage in this document and as part of the field of computer networking. Any meaning or usage outside of these specific areas may not be included and is not necessarily implied. # 100BASE-TX 100Mbps Ethernet LAN communications standard set by the IEEE (in standard 802.3u); also called ast Ethernet.” 100Mbps 100 million bits per second; an expression of transmission speed in a network.
Dual-Speed Stackable Hub Web-based Management User’s Guide B Bandwidth The range of frequencies available across a communications channel; in one sense, the ize” of the communications channel. BOOTP The BOOTstrap Protocol, a method network devices can use to obtain TCP/IP configuration information from a central location on startup. Bridge A LAN device used to connect two different LANs so that packets can be transmitted from one to the other.
Crossover Cable A type of twisted-pair cable in which the wires at one end have been reversed in order to match pinouts on a hub or switch. CSMA/CD Carrier Sense Multiple Access with Collision Detection; a network communications protocol in which each transmission source (i.e., station, server, switch, etc.) monitors the main data channel for traffic before and during transmission, postponing transmission when the data channel is in use.
Dual-Speed Stackable Hub Web-based Management User’s Guide I IEEE Institute of Electrical and Electronics Engineers, an accredited professional group of scientists and engineers who help set standards for LAN communications technology. In-band Communications with a network device using the network medium itself. Contrast with ut-ofband.” J Jabber Malfunction of a network device wherein it continuously transmits random data.
Out-of-band Communications with a network device using some medium other than the network itself. P Packet An addressed segment of data transmitted on a network. Preamble Data bits at the beginning of each block of data, used for synchronization. R Repeater LAN signal regenerator. An Ethernet hub is a type of repeater. S Segment Part of an Ethernet or other network on which all traffic is common to all nodes. See ollision Domain.
Dual-Speed Stackable Hub Web-based Management User’s Guide Telnet Terminal emulation for the TCP/IP protocol suite, used for interacting with remote computers and devices. TFTP Trivial File Transfer Protocol; a low-overhead protocol for file transmission over TCP/IP networks. Often used for obtaining device configuration files or bootstrap image files. Trap An SNMP request that managed network devices send to network management stations, to inform them that some problem has been detected.
C cascade ....................................................................................................10, 37 Category 5 ...................................................................................2, 23, 26, 113 CE ..........................................................................................................vi, 123 Class II ..............................................................................................2, 23, 121 collisions ............................................
M MAC address.................................................................................................56 master .................................. xii, 2, 3, 7, 10, 11, 17, 19, 20, 24, 25, 31, 35, 36, 37, 38, 39, 41, 49, 53, 56, 58, 59, 70, 71, 117 MII ..................................................................................................................4 module.......................................................2, 3, 10, 17, 30, 31, 32, 33, 34, 122 N Navigation........................
TFTP ...................................................................37, 38, 48, 49, 117, 118, 130 Topology .....................................................................................................121 U Uplink .............................................................................................4, 9, 27, 28 utilization ..........................................................................................3, 17, 122 UTP.................................................................
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