3Com 5000 ATM - Manuals

F IGURES 1-1 ATM Backbone SwitchModule Hardware Components 1-4 1-2 ATM Backbone SwitchModule Base Configuration 1-6 1-3 ATM Backbone SwitchModule with Redundant ATM OC-3 Card 1-7 1-4 Example Base Configuration 1-10 1-5 Example Dual-Homing Configuration 1-11 1-6 Example Dual-Homing/Module Redundancy ...

T ABLES 1 Notice Icons 2 2 Text Conventions 2 1-1 Supported Standards and MIBs 1-4 1-2 SwitchModule Installation Per Backplane 1-8 4-1 Other Vbridge IGMP Snooping Options 4-4 6-1 Base Module LED Status 6-2 6-2 Base Module LED Corrective Actions 6-3 6-3 ATM OC-3 Card LED Corrective Actions 6-4 A-1 En...

A BOUT T HIS G UIDE Introduction This guide describes how to install, configure, and manage the 3Com CoreBuilder ® 5000 ATM Backbone SwitchModule. If the information in the release notes shipped with your product differs from the information in this guide, follow the release note instructions. Audie...

2 A BOUT T HIS G UIDE Conventions The following tables list conventions used throughout this guide: Table 1 Notice Icons Icon Type Description Information Note Information notes call attention to important features or instructions. Caution Cautions alert you to personal safety risk, system damage, o...

Related Documents 3 Related Documents This section provides information on supporting documentation, including: ■ 3Com Documents ■ Reference Documents 3Com Documents The following documents provide additional information on 3Com products: ■ CoreBuilder 5000 SwitchModule User Guide — Provides informa...

4 A BOUT T HIS G UIDE ■ Co reBuild er 5000 Integrated System Hub Installation and Operatio n Guide — Provides information on the installation, operation, and configuration of the CoreBuilder 5000 Integrated System Hub. This guide also describes the principal features of the CoreBuilder 5000 Fault-To...

Related Documents 5 ■ Kastenholz, F. and McCloghrie, K., Evolution of the Interfaces Group of MIB-II, RFC 1573, FTP Software and Hughes LAN Systems, January 1994. ■ Brown, T. and Tesink, K., Definitions of Managed Objects for the SONET/SDH Interface Type, RFC 1595, Bell Communications Research, Marc...

1 I NTRODUCTION This chapter describes the features and components of the 3Com CoreBuilder ® 5000 ATM Backbone SwitchModules and how ATM Backbone SwitchModules operate. This chapter contains the following sections: ■ ATM Backbone SwitchModule Overview ■ ATM Backbone SwitchModule Architecture ■ ATM B...

1-2 C HAPTER 1: I NTRODUCTION Multiple Redundancy Levels You can configure the ATM Backbone SwitchModule for two levels of redundancy: ■ PHY Redundancy — A secondary ATM OC-3 card provides PHY redundancy. If the primary ATM OC-3 card or attached cable fails or performance fails or is no longer recei...

ATM Backbone SwitchModule Overview 1-3 Hot Swap Feature You can insert or remove ATM Backbone SwitchModules without powering off the CoreBuilder 5000 chassis. Supported CoreBuilder 5000 SwitchModules CoreBuilder 5000 ATM Backbone SwitchModules provide ATM connectivity for the following CoreBuilder 5...

1-4 C HAPTER 1: I NTRODUCTION Supported Management Standards CoreBuilder 5000 ATM Backbone SwitchModules support the standards and MIBs shown in Table 1-1. ATM Backbone SwitchModule Architecture This section describes the hardware components of the CoreBuilder 5000 ATM Backbone SwitchModule. Figure ...

1-6 C HAPTER 1: I NTRODUCTION ATM Backbone SwitchModule Descriptions This section describes the base and redundant hardware configurations of the ATM Backbone SwitchModule. Base Hardware Configuration Figure 1-2 shows the ATM Backbone SwitchModule with only the primary ATM OC-3 card installed. Figur...

ATM Backbone SwitchModule Descriptions 1-7 Redundant Hardware Configuration Figure 1-3 shows the ATM Backbone SwitchModule with an optional redundant ATM OC-3 card installed. Figure 1-3 ATM Backbone SwitchModule with Redundant ATM OC-3 Card See the CoreBuilder ® 5000 ATM Backbone SwitchModule Quick ...

1-8 C HAPTER 1: I NTRODUCTION PacketChannel Backplane Description An ATM Backbone SwitchModule installed in the CoreBuilder 5000 hub connects to the CoreBuilder 5000 PacketChannel backplane. There are two kinds of PacketChannel backplanes: ■ Standard PacketChannel — Supports packet-switching. When y...

PacketChannel Backplane Description 1-9 Refer to the CoreBuilder 5000 Integrated System Hub Installation and Operation Guide for more information about CoreBuilder 5000 hub backplanes. 10-Slot PacketChannel (Part Number 30-0432) 3C96010C-AP3C96010C-BP3C96010CH-AP Install ATM Backbone SwitchModule in...

1-10 C HAPTER 1: I NTRODUCTION Sample ATM Backbone SwitchModule Configurations This section illustrates three basic configurations of the ATM Backbone SwitchModule: ■ Basic Configuration ■ Dual-Homing Configuration ■ Dual-Homing/Module Redundancy Configuration Basic Configuration Figure 1-4 illustra...

Sample ATM Backbone SwitchModule Configurations 1-11 Dual-Homing Configuration Figure 1-5 illustrates the dual-homing configuration of an ATM Backbone SwitchModule with a redundant ATM OC-3 card. Figure 1-5 Example Dual-Homing Configuration If the loss of light, frame, or cell delineation is detecte...

1-12 C HAPTER 1: I NTRODUCTION Dual-Homing/Module Redundancy Configuration Figure 1-6 illustrates the dual-homing/module redundancy configuration of two ATM Backbone SwitchModules with redundant ATM OC-3 cards. Figure 1-6 Example Dual-Homing/Module Redundancy Configuration The LECs in the example co...

Sample ATM Backbone SwitchModule Configurations 1-13 The features of the dual-homing/module redundancy configuration include: ■ Load balancing LEC support is distributed manually across two ATM Backbone SwitchModules ■ ATM PHY redundancy On either ATM Backbone SwitchModule, if the loss of any critic...

2-2 C HAPTER 2: LAN E MULATION O VERVIEW Figure 2-1 LAN Emulation Function The ATM Backbone SwitchModule provides a LAN emulation bridge between an ATM network and a standard Ethernet-based SwitchModule (Figure 2-2). Figure 2-2 ATM Backbone SwitchModule Function The ATM Backbone SwitchModule accepts...

LAN Emulation Components 2-3 LAN Emulation Components This section identifies: ■ General LANE Components ■ ATM Backbone SwitchModule LANE Components General LANE Components The major components of ATM LAN emulation are identified in Figure 2-3. Figure 2-3 General LAN Emulation Components Each of the...

2-4 C HAPTER 2: LAN E MULATION O VERVIEW Broadcast and Unknown Server (BUS) The Broadcast and Unknown Server is a multicast server that forwards multicast and broadcast traffic to LECs within a specific ELAN. The BUS also floods unknown unicast traffic to all LECs in the ELAN. ATM Backbone SwitchMod...

LAN Emulation Data Exchange 2-5 Virtual Bridge (vbridge) You create virtual bridges on CoreBuilder 5000 SwitchModules. You assign each bridgeport-LEC to a vbridge on a SwitchModule in the CoreBuilder 5000 hub. Emulated LAN (ELAN) You assign each bridgeport-LEC to an ELAN in the ATM network. An ELAN ...

2-6 C HAPTER 2: LAN E MULATION O VERVIEW Packets Versus Cells The ATM Backbone SwitchModule converts Ethernet- and FDDI-originated packets to and from ATM cells. Figure 2-6 illustrates the conversion of SwitchModule packets to and from ATM cells. Figure 2-6 Converting SwitchModule Packets to and fro...

LAN Emulation Connections 2-7 LAN Emulation Connections LAN emulation uses VCCs (virtual channel connections) to provide communications between a LEC and the LANE service. There are two types of VCCs: ■ Control VCCs ■ Data VCCs Control VCCs Control VCCs consist of the following three types: ■ Config...

2-8 C HAPTER 2: LAN E MULATION O VERVIEW Data VCCs Data VCCs consist of the following three types: ■ Data Direct VCC — A bidirectional point-to-point VCC set up between two LECs that want to exchange data ■ Multicast Send VCC — A bidirectional point-to-point VCC between the LEC and the BUS ■ Multica...

LAN Emulation Operation 2-9 LAN Emulation Operation This section describes the simplified operation of a LEC in a LAN emulation configuration. LEC operation is defined by the protocols of the LAN Emulation User-Network Interface (LUNI). LUNI protocol defines each stage of operation for a LEC. The ma...

2-10 C HAPTER 2: LAN E MULATION O VERVIEW LECS Connection The LEC must determine the ATM address of its LECS and establish a connection to the LECS. The LEC attempts each of the following methods, in the order provided, to connect to its LECS: 1 Uses a locally configured LECS ATM address. 2 Queries ...

LAN Emulation Operation 2-11 BUS Connection During the BUS Connection stage, the LEC: 1 Sends an LE-ARP (LAN Emulation-Address Resolution Protocol) request to the LES containing the target MAC address FF-FF-FF-FF-FF-FF (broadcast MAC address). The LES returns an LE-ARP response containing the ATM ad...

3 C ONFIGURING THE ATM B ACKBONE S WITCH M ODULE This chapter provides procedures for configuring the CoreBuilder ® 5000 ATM Backbone SwitchModule. This chapter contains the following sections: ■ Configuration Tools ■ Setting Up DMM Access ■ Configuration Process Overview ■ Configuring LAN Emulation...

3-2 C HAPTER 3: C ONFIGURING THE ATM B ACKBONE S WITCH M ODULE Distributed Management Module The CoreBuilder 5000 Distributed Management Module (DMM) and Advanced DMM (ADMM) provide commands that allow you to configure and monitor the ATM Backbone SwitchModule. The ATM Backbone SwitchModule requires...

Configuration Tools 3-3 Figure 3-1 UNIX Tools for Configuring ATM Backbone SwitchModules Transcend Network Control Services for UNIX applications are accessed by: ■ Selecting the application directly from the Tools menu of the network platform (for example, HP OpenView) ■ Selecting a launch point fr...

3-4 C HAPTER 3: C ONFIGURING THE ATM B ACKBONE S WITCH M ODULE Figure 3-2 Windows Tools for Configuring ATM Backbone SwitchModules Transcend Network Management Software for Windows applications are accessed by: ■ Selecting the application directly from the Tools menu of the Network Platform (for exa...

Setting Up DMM Access 3-5 Setting Up DMM Access This section provides procedures you must follow to set up access to DMM management tools. You can access the DMM by: ■ Direct terminal access ■ TELNET access Setting Up Direct Terminal Access to the DMM Refer to the CoreBuilder 5000 Distributed Manage...

3-6 C HAPTER 3: C ONFIGURING THE ATM B ACKBONE S WITCH M ODULE Configuration Process Overview This section provides an overview of the following configuration information: ■ Configuration Components ■ Configuration Defaults Configuration Components ATM Backbone SwitchModule configuration consists of...

Configuration Process Overview 3-7 ATM Configuration CAUTION: Changes to the ATM parameters can cause problems with system operation. Only qualified ATM service personnel should attempt to modify these parameters. We recommend that you do not attempt to change these parameters. Various ATM parameter...

3-8 C HAPTER 3: C ONFIGURING THE ATM B ACKBONE S WITCH M ODULE ■ LECs 2 through 8 are set to the following parameter values: ■ Configuration mode is Manual. ■ Interface mode is Disabled. ■ ELAN Name is None. ■ Vbridge assignment is Unassigned. Configuring LAN Emulation Parameters The procedure you u...

Configuring ATM OC-3 Card Redundancy 3-9 2 Save the settings as follows: CB5000> save all 3 Repeat steps 1 and 2 for each LEC you require. 4 Assign a unique LES address for each bridgeport LEC on the same module. If a bridgeport LEC has an address configured that is a duplicate of another bridgep...

If you disable automatic failover and a primary ATM OC-3 card failure occurs, you must use the command in step 1 to make the redundant ATM OC-3 card active. There is a configurable feature called the loss of signalling delay. The default is 0 seconds, and the maximum is 60 seconds. PHY failover can ...

Configuring IGMP Snooping Parameters 3-11 3 View the status of IGMP snooping on a vbridge configured on the ATM backbone SwitchModule. For example, the following command displays the status of IGMP snooping on vbridge 1 on the ATM Backbone SwitchModule in slot 9: CB5000> show vbridge 1 igmp_snoop...

4-2 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS SHOW VBRIDGE Use the SHOW VBRIDGE command to display the following vbridge configuration information about the ATM Backbone SwitchModule: ■ General vbridge configuration information ■ Detailed vbridge configuration information ■ IGMP snooping infor...

Using DMM/ADMM Commands 4-3 Displaying Detailed Vbridge Configuration Information The following command shows detailed vbridge configuration information about an ATM Backbone SwitchModule in a CoreBuilder 5000 hub: CB5000> show vbridge all configuration verbose Interface Number: 4 Interface Mode:...

4-4 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS Displaying IGMP Snooping Vbridge Information The following command shows IGMP snooping status information for vbridge 11 configured on an ATM Backbone SwitchModule installed in the hub: CB5000> show vbridge 11 igmp_snooping status IGMP Snooping ...

Using DMM/ADMM Commands 4-5 SHOW MODULE Use the SHOW MODULE command to display module-level information about the ATM Backbone SwitchModule. The following command shows detailed module information about an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000> show module 4.1 verb...

4-6 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS SHOW BRIDGE_PORT Use the SHOW BRIDGE_PORT command to display: ■ General status information for all bridge ports on the module ■ Detailed information about one bridge port on the module Displaying General Status Information The following command dis...

Using DMM/ADMM Commands 4-7 Displaying Detailed Information The following command displays information about bridge port 2 on an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000> show bridge_port 4.2 verbose Bridge Port Display for Module 6602M-MOD: BPort I/F Status Stp State...

4-8 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS SHOW COUNTER BRIDGE_PORT Use the SHOW COUNTER BRIDGE_PORT command to display statistics for a bridge port on the module. The following command displays statistics about bridge port 2 on an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 h...

Using DMM/ADMM Commands 4-9 SHOW ATM Use the SHOW ATM command to display the following ATM information: ■ ATM Interface Parameters ■ ATM ILMI Configuration ■ ATM Q93b Parameters ■ ATM QSAAL Parameters ■ ATM Signal Configuration ■ ATM Statistics ■ ATM Traffic Description ■ ATM VCCs ATM Interface Para...

4-10 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS ATM ILMI Configuration The following command displays information about the ATM ILMI configuration for an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000> show atm 4 ilmi_configuration Slot Module Version Network General I...

Using DMM/ADMM Commands 4-11 ATM QSAAL Parameters The following command displays information about ATM QSAAL parameters for an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000> show atm 4 qsaal Slot Module Version Network General Information ------ ------------ ------- ------...

4-12 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS ATM Statistics The following command displays ATM statistics for an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000> show atm 4 statistics Slot Module Version Network General Information ------ ------------ ------- -------...

Using DMM/ADMM Commands 4-13 ATM VCCs The following command displays information about ATM VCCs for an ATM Backbone SwitchModule in slot 4 of a CoreBuilder 5000 hub: CB5000 > show atm 4 vcc all Slot Module Version Network General Information ------ ---------- ------- --------- -------------------...

4-16 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS BPORT_LEC Server Circuits The following command displays the server circuits for bridgeport-LEC 2 on an ATM Backbone SwitchModule in slot 4: CB5000> show bport_lec 4.2 server_circuits Bridge Port LEC Display for Module 6602M-MOD: BP LEC Mode I/...

Using DMM/ADMM Commands 4-17 SHOW SONET Use the SHOW SONET command to display the following ATM SONET information: ■ SHOW SONET Status ■ SHOW SONET Statistics SHOW SONET Status The following displays SONET status information for an ATM Backbone SwitchModule in slot 13: CB5000> show sonet 13.1 sta...

Using DMM/ADMM Commands 4-19 SHOW IGMP SNOOPING Use the SHOW IGMP SNOOPING command to display the IGMP snooping information on a module. You can view the IGMP snooping information on all of the modules installed in a CoreBuilder 5000 hub using the SHOW IGMP_SNOOPING MODULE ALL command or IGMP snoopi...

4-20 C HAPTER 4: S TATUS M ONITORING AND S TATISTICS Using Graphical Interface Tools Transcend ® Network Control Services provides advanced graphical management capabilities that enable you to monitor ATM Backbone SwitchModule operation and collect and display statistics. Transcend Network Control S...

Using Graphical Interface Tools 4-21 Device Management for Hubs Device Management for Hubs allows you to display the operating status of a selected device, configure the device, or display statistics. When you launch Device Management for Hubs, an image of the selected device, known as Device View ,...

5 I NTERNET G ROUP M ANAGEMENT P ROTOCOL (IGMP) S NOOPING This chapter provides the following information about IGMP snooping: ■ Overview ■ CoreBuilder 5000 Support ■ Locating Multicast Routers in the Network ■ No Multicast Routers on the Network ■ Enabling IGMP Snooping on CoreBuilder 5000 SwitchMo...

5-2 C HAPTER 5: I NTERNET G ROUP M ANAGEMENT P ROTOCOL (IGMP) S NOOPING Disabling IGMP snooping The default setting for IGMP snooping is enabled. To disable it, enter the SET VBRIDGE <X> IGMP_SNOOPING DISABLE command. Before implementing IGMP snooping Before you implement IGMP snooping within ...

Overview 5-3 Figure 5-1 shows a typical packet path before snooping occurs. Figure 5-1 Multicast Packet Path before Snooping Eliminating unwanted IP multicast protocols IGMP snooping switch and multicast MAC address filters work together to eliminate unwanted IP multicast routing protocols as follow...

5-4 C HAPTER 5: I NTERNET G ROUP M ANAGEMENT P ROTOCOL (IGMP) S NOOPING Figure 5-2 shows the format of a typical IGMP snooping version 1 message that is received after an IGMP snooping query in a multicast group has been completed. Figure 5-2 Format of an IGMP Version 1 Message When IGMP snooping is...

Overview 5-5 The result is that multicast traffic is flooded through a multicast group-specific subset of the switched fabric, namely that subset that contains either end stations that have joined the given multicast group, or multicast routers. The location of multicast group members is determined ...

Enabling IGMP Snooping on CoreBuilder 5000 SwitchModules 5-7 Enabling IGMP Snooping on CoreBuilder 5000 SwitchModules IGMP snooping can be enabled on the following CoreBuilder 5000 SwitchModules: ■ FTE SwitchModule v1.2 ■ GigaFTE SwitchModules IGMP snooping on a CoreBuilder 5000 SwitchModule When yo...

5-8 C HAPTER 5: I NTERNET G ROUP M ANAGEMENT P ROTOCOL (IGMP) S NOOPING Figure 5-4 shows a typical FTE DRAM address forwarding entry. Figure 5-4 FTE DRAM Address Forwarding Entry Frame Tagging can be set on a CoreBuilder 5000 SwitchModule after it is enabled for IGMP snooping. FTE Address Forwarding...

6 T ROUBLESHOOTING This chapter describes: ■ Troubleshooting Using LEDs ■ Recovering from Problems ■ Resetting the ATM Backbone SwitchModule ■ Obtaining Technical Assistance Troubleshooting Using LEDs This section identifies possible causes and solutions for ATM Backbone SwitchModule LED indications...

6-2 C HAPTER 6: T ROUBLESHOOTING When you press the LED test button: 1 The Controller Module initiates a test to all modules in the hub. All LEDs should respond by lighting continuously for approximately 5 seconds. 2 During this time, the bi-color LEDs should alternate between green and yellow appro...

Troubleshooting Using LEDs 6-3 Determining Corrective Action Table 6-2 identifies appropriate corrective actions for each base module LED indication. Table 6-2 Base Module LED Corrective Actions LED LED State Possible Cause Corrective Action MOD STAT Green Normal operating indication. None required....

6-4 C HAPTER 6: T ROUBLESHOOTING Troubleshooting ATM OC-3 Card LEDs This section explains how to read the ATM OC-3 card LEDs and determine appropriate corrective action The LEDs on the base module and ATM OC-3 cards function independent of each other. Table 6-3 identifies possible causes and correct...

Recovering from Problems 6-5 Recovering from Problems Use the following procedure to recover from operating problems or module failure. Each of these steps is explained in more detail in the sections that follow. 1 Verify that the DMM can communicate with the ATM Backbone SwitchModule 2 Verify that ...

6-6 C HAPTER 6: T ROUBLESHOOTING If the ATM Backbone SwitchModule model number is not listed, try each of the following corrective actions: If the DMM can communicate with the ATM Backbone SwitchModule, proceed to Verifying Software Versions. 1 Reset the ATM Backbone SwitchModule by pressing the Res...

Recovering from Problems 6-7 Verifying Critical Parameters Verify that the settings of the following critical parameters match those of the ATM switch to which the ATM Backbone SwitchModule is connected: ■ UNI version (default is 3.0) ■ LEARP Quiet Time (default is 5 seconds) ■ Configuration mode (L...

6-8 C HAPTER 6: T ROUBLESHOOTING 3 Use the following command to check the following SONET status indicators: CB5000> show sonet <slot.phy_num> status Verify that the display lists status is OK for the following indicators: ■ Line Current Status ■ Section Current Status ■ Path Current Status...

Recovering from Problems 6-9 4 Use the following command to display vcc parameters: CB5000> show atm <slot> vcc all Verify the following parameters settings: ■ SIG is 0/5 ■ ILMI is 0/16 5 If necessary, use the following command to reset the ILMI parameter: CB5000> set atm <slot> il...

6-10 C HAPTER 6: T ROUBLESHOOTING 3 Use the following command to display the LAN/E status of the LEC: CB5000> show bport_lec <slot.lec> status Check the indication of the Interface State parameter. The possible status indications are: ■ Initial ■ Configure ■ Join ■ Bus connect ■ Operational...

Recovering from Problems 6-11 Verifying Bridging Configuration Use the following procedure to verify the bridging configuration of the ATM Backbone SwitchModule: 1 Use the following command to display information about the LEC bridging configuration. CB5000> show bridge_port <slot.lec> verb...

6-12 C HAPTER 6: T ROUBLESHOOTING Verifying ATM OC-3 Switchover If the Redundant ATM OC-3 card does not become active upon failure of the primary ATM OC-3, use the following command to verify that the PHY Automatic Failover parameter is Enabled: CB5000> show module <slot.phy> verbose If the...

Obtaining Technical Assistance 6-13 Obtaining Technical Assistance You can receive assistance for installing and troubleshooting an ATM Backbone SwitchModule by calling either your 3Com reseller or 3Com network supplier. Be prepared to supply a representative with the following information: ■ Descri...

A S PECIFICATIONS This appendix lists the following specifications for the CoreBuilder 5000 ATM Backbone SwitchModules: ■ Environmental Specifications ■ Mechanical Specifications ■ Power Specifications ■ ATM OC-3 Card Fiber Optic Specifications Environmental Specifications Table A-1 lists the ATM Ba...

A-2 C HAPTER A: S PECIFICATIONS Power Specifications Table A-3 lists the ATM Backbone SwitchModule power specifications. ATM OC-3 Card Fiber Optic Specifications Table A-4 lists the ATM Backbone SwitchModule OC-3 fiber optic specifications. Table A-4 ATM Backbone SwitchModule Fiber Optic Specificati...

B T ECHNICAL S UPPORT 3Com provides easy access to technical support information through a variety of services. This appendix describes these services. Information contained in this appendix is correct at time of publication. For the most recent information, 3Com recommends that you access the 3Com ...

B-2 A PPENDIX B: T ECHNICAL S UPPORT 3Com FTP Site Download drivers, patches, software, and MIBs across the Internet from the 3Com public FTP site. This service is available 24 hours a day, 7 days a week. To connect to the 3Com FTP site, enter the following information into your FTP client: ■ Hostna...

Support from Your Network Supplier B-3 Access by Digital Modem ISDN users can dial in to the 3Com BBS using a digital modem for fast access up to 64 Kbps. To access the 3Com BBS using ISDN, call the following number: 1 847 262 6000 3Com Facts Automated Fax Service The 3Com Facts automated fax servic...

B-4 A PPENDIX B: T ECHNICAL S UPPORT When you contact 3Com for assistance, have the following information ready: ■ Product model name, part number, and serial number ■ A list of system hardware and software, including revision levels ■ Diagnostic error messages ■ Details about recent configuration c...

Returning Products for Repair B-5 Returning Products for Repair Before you send a product directly to 3Com for repair, you must first obtain an authorization number. Products sent to 3Com without authorization numbers will be returned to the sender unopened, at the sender’s expense. To obtain an aut...

I NDEX 1 I NDEX Numbers 3Com bulletin board service (3Com BBS) B-23Com Facts B-33Com Knowledgebase Web Services B-13Com URL B-1 A ADMM version required 3-2 Architecture 1-4ATM cell construction 2-6Configuring 3-7Forum LANE 1.0 1-4Forum LEC MIB 1-4Forum specification compliance 1-2Forum UNI 3.0/3.1 1...

3Com Corporation L IMITED W ARRANTY CoreBuilder ® 5000 ATM Backbone SwitchModule H ARDWARE 3Com warrants to the end user (“Customer”) that this hardware product will be free from defects in workmanship and materials, under normal use and service, for one (1) year from the date of purchase from 3Com ...