3Com 7600 specification

11-12CHAPTER 11: ETHERNET LANS AND BRIDGES IN THE 7600 CARD

Local Bridged-LANFor the purpose of forming bridged-LAN environments, the 7600 Card Environment provides up to 16 internal bridges that can be configured by

management. On setup, one bridge is allocated to each bridged-LAN environment that is to operate in the 7600 Card. Each local LAN segment is then attached to a port of the bridge corresponding to the bridged-LAN environment in which it is to operate. bridges are configured by management in the Fast Setup (see Chapter 3) or in the Virtual LAN Configuration menu see (Chapter 5). For management purposes the bridges are numbered from 0 to 3 in each one of the four contexts. Figure 11-5 shows two local bridged-LAN environments, Engineering and Finance, connected to bridges on a 7600 Card.

Figure 11-5Bridged-LAN environments connected to a 7600 Card

Connection to the In Chapter 12, the possibility of connecting bridges in the 7600 to the ATM Network ATM network is discussed. For each bridge, an ATM connection can be

configured through which the bridge is attached to an Emulated LAN (see “Bridges in the 7600 Card” on page 12-10).

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3Com manual 11-12CHAPTER 11 Ethernet Lans and Bridges in the 7600 Card

Contents

User Guide United States Government Legends Contents Parameter Entry Quick Key Functions Menu Index Power-UpNormal operation Fast Ethernet Status Indicators Rapid Configuration Display Bridge STP Attributes Remove a Static Address from FDB Display STP Enable StatusFast Ethernet Port Attributes and Statistics Display Broadcast Throttling Attributes Managing ATM Resources Display Current LEC Configuration Display Software Version 10-2 Display Snmp ConfigurationUpdate NMS IP Address Enable/Disable Event Messages 10-14 12-7 12 ATM, LAN EMULATION, and Virtual Lans 13-5 12-14Bridge Frame Forwarding Logic 12-15 Fast Ethernet Card Specifications Physical C-1 Glossary About this Guide GuideIf you are looking for information about Turn to 7600 Card Documentation and Related Manuals ConventionsTables 1 and 2 list conventions used throughout this guide Conventions If you want to Read 7600 Card Documentation Road Map Card Overview of the 7600 CardAbout Card Front Panel of the 7600 Card with full configuration Capabilities 3Physical module with SC connector for fiber ports 4CHAPTER 1 Overview of the 7600 Card Typical Applications of the 7600 Card 5Fast Ethernet backbone Server farm Starting UP Safety Precautions Installation and POWER-UP Mesures de sécurité Vorsichtsmaßnahm en Installing RemovingCard Modules Connecting to Connection to a workstation or other DTE, using a normalNetwork Devices Connecting to a Local ManagementTerminal How they are indicated on the LED display System Power green Fail red Active orangeCard System States Mode Meaning and User Action Power-UpPower-up phase and initiates the Power-On Self-Test When the 7600 Card is powered-up, it automatically begins LED Color Meaning 4Fast Ethernet Port LEDs Fast Setup ConfigurationRapid CELLplex SetupSetup Modes Full Setup Mode Switch Setup Mode Setup Mode SelectionSetting Special Parameters Sections 1Integrated Fast Setup Procedure Sections2Setup Procedure Navigation Aids Setup Section Description CELLplex 7000. The CELLplex Main Menu appears as follows Integrated Fast Setup is initiated from the LMA Main MenuSelect the menu item 9 FST Fast Setup Operation Network Prefix Section Example Dialog The following dialog appears on the screen LE Parameters Section Lecs Address SectionUNI/NNI Parameters Section Virtual Network Configuration Section LE Client Configuration Section Confirmation Dialog Section Admin VN Management Configuration Section Contex Setup to perform a rapid configuration of the 7600 CardMulti-context Fast Port Context Type To go to 4Setup Procedure Navigation Aids Admin Main Menu appears as in the following example Management Configuration Section Elan Configuration Section New configuration is displayed for this context System Mode Configuration Section Card Management Tasks Local Management Basics ManagementMenu Hierarchy Main menu Keying in this submenu’s 4 option gives you the prompt Example Finally, entering 1 finalizes the prompt as Entry of the stp submenu’s 3 option produces the prompt 3Editing Aids 2Menu Navigation Functions Menu Index Menu hierarchySystem Management Menu ATM Menu Bridge Menu LAN Emulation Menu Network Management Menu Virtual LAN Menu Bridge Configuring Virtual LansConfiguring Bridges Display Current Enter 6 Following is displayed 2Bridge Configuration ParametersAttach Fast Ethernet Port to Internal ATM port is attached to bridge #0 Attach InternalATM Port to Bridge Fast Ethernet port #3 is attached to bridge #1 Managing the Bridge Forwarding Database Management TasksManaging Fast Ethernet Ports Managing Ethernet Bridges Managing the Spanning Tree Protocol Bridge-wide Fast Ethernet PortAttributes Statistics Name Description 3Fast Ethernet Port Characteristics2Ethernet Port Attributes 4Ethernet Port Statistics 1Fast Ethernet Port Attributes and Statistics Display Following information for Port #1 is displayed Throttling Disable a FastEthernet Port Display Broadcast Enable/Disable ThresholdBroadcast Throttling 10Task Actions for Fx Port Type 9Task Actions 11Task Actions for Tx Port Type Example 1 for Tx port typeFast Ethernet Tx port #1 is set to half duplex Example 2 for Fx port type 3Bridge Attributes and Statistics Display 13Bridge Attributes and Statistics Bridge-port UpdateBridge-aging Time 4Bridge Attributes and Statistics Display 16Bridge-port Attributes and Statistics 17 Task Actions Display All EntriesForwarding Database 5Forwarding Database Display 19 Task Actions Display LearnedEntries Learning Station Addresses on Display Static Forwarding Database see Static Addresses on21Task Actions 22Static Table Fields Static Addresses Allowed-to Binary Table 23Hexadecimal Codes for Displaying Multiple Bridge PortsBridge Ports Hex Value Bridge Ports Hex Value 7Static Table Display Block a Static AddressStatic Forwarding Database of bridge #0, the MAC address Database see Static Addresses on Remove a StaticAddress from FDB Ports #4 Status Display STP EnableDisable STP on About the STP enable status see Disabling the STP on 30Bridge STP Attributes 9Bridge STP Attributes Display STP attributes for bridge #0 is displayed as follows Parameters Bridge-wide STP Update Bridge-forward Delay Bridge-forward-delay for bridge #0 is set to 1500 secsExample Enter 36Bridge-port STP Attributes STP Attributes 10Bridge-port STP Attributes Display Attributes of port #1 of bridge #0 are displayed as follows Bridge-path-cost for port #1 of bridge #0 is set to Bridge-path-cost Manage Bridge ATM addresses Update ATM parametersManaging ATM Resources Manage ATM port Display ATM Port Attributes Statistics Enter 42ATM Port Attributes and Statistics Following sample ATM statistics report is displayed 4ATM Address FieldsField Description 2ATM Address Display Following is a sample ATM address display Display TM More information about Traffic Management in the 7600 Card5Task Actions Toggles TM operation on and off Enable TM Characteristic Range Default Meaning TM remote Client Database is displayed as follows9Task Actions Information see Display TM Clients on Add TM Client Selected version is saved in flash Enable/Disable ATMPort Admin Status Up to enable the ATM port or down to disable the ATM port Context #0 Event ATM port Link Up Manage operational parameters Manage configuration parametersManaging LAN Emulation Clients Display statistics Transmission over an Elan on Update Unknown Unicast-flood- ModeDisplay LEC Manage data-frame parameters Enter 5 1 4LEC Configuration and Status Information Lecs Information DescriptionLES Information Description BUS Information Description 2LEC Configuration and Status Display Elan name for the LEC of bridge #0 is entered Update LecsEnter the bridge number and ATM address or ! to invalidate See LAN Emulation Overview on LAN Emulation Overview on Enable LecsAddress via Ilmi LES address for the LEC of bridge #0 is entered LEC Parameter Description Operational10. For more information see LEC Parameters on 10LEC Operational Parameters Control-timeout parameter in seconds Update LECUpdate the LEC operational parameters control-timeout VCC-timeout-period, aging-time, forward-delay-time Enter 533 0 Enter 535 0 18Task Actions 19Task Actions 20Task Actions Control-frameRefer to -21. For more information see Emulated LAN Connections on Enter 54 16CHAPTER 8 Managing LAN Emulation Clients Unknown Unicast Frames on Update UnknownUnicast-flood Mode LE flood mode for Bridge #0 is now NotFlood Display Snmp Configuration Update NMS IP Address Setting Network Parameters Display Current IP 2IP Configuration Information Default Gateway for bridge #0 is updated to Update DefaultIP Address for bridge #0 is updated to Default Gateway for the specified bridge Update Subnet MaskDisplay Snmp Traps Update NMS IP Managing System Functions Manage event messages Resetting systemDisplay Software Version Download Status DownloadSoftware from Network Local Erase SoftwareFrom Flash Software from Display Hardware Configuration Set System Current system configuration mode Forward Mode After the next resetSet Store-and Display Timeout For descriptions of the timeout parameters9Timeout Parameters Following is a sample timeout parameters report CPI Delays Update HardwareTimeout Delay Software timeout mechanism Update Software Password UpdatedWrite-access Event Messages Admin-access Enter 1 System hardware is reset and device is rebooted III 7600 Card Capabilities Ethernet Overview Fast Ethernet Full or Half Duplex Mode 10/100 Mbps transmission speedAuto-negotiation 10 or 100 Mbps Speed 2Cable Support by Transceiver TypeTransceiver type Cable type Number Pairs fibers Fast Ethernet Ports 11-6CHAPTER 11 Ethernet Lans and Bridges in the 7600 Card Transparent Bridges Can be defined as follows Spanning TreeProtocol Address of a bridge port, called Self Spanning Tree Protocol Designated Bridge on a LAN Spanning Tree port selection Parameters in -4 are set for individual bridge ports 3Port-independent Bridge Parameters4Port-dependent bridge parameters 11-12CHAPTER 11 Ethernet Lans and Bridges in the 7600 Card ATM Overview Virtual Lans ATM Basics Virtual Channels Interface Ilmi Interim Local LAN Emulation BUS Control VCCs Emulated LANConnections LAN Emulation Illustrates the VCCs active among LAN Emulation Components Elan Name 3LEC Configuration and Status Information Bridges Both local and remote destination LANs in the ATM networkBridge acts like a standard transparent bridge 2Bridges in the 7600 Card 12-12CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Bridges in the 7600 Card Entry obtained by Topology flag Aged by Data Transmission over an Elan Unknown unicast flooding mode5Unknown Unicast Flooding Mode Mode Bridge action Be set by management Parameter Description Minimum Default MaximumLEC Parameters Flush protocol Virtual LANs 12-18CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Virtual LANs in the 7600 Card 12-20CHAPTER 12 ATM, LAN EMULATION, and Virtual Lans Each vLAN communicates with its server Workgroups 6Logical and Physical View of a Network With vLANs ATM Network Topics are discussedHow Traffic Management is implemented within the 7600 Card 1Example of a source to destination ABR control loop Generate backward RM-cells TrafficManagement Concepts This congestion information Functions Traffic Found in the connected device ConfigurationATM technology without having cell loss due to congestion 7600 Card checks connected devices for Traffic Management 13-6CHAPTER 13 Traffic Management in the ATM Network 2Traffic Management control steps As shown. The traffic management is performed as follows Protocols Device Management Out-of-Band In-Band Local Management 27600 Card Administration Console Snmp Agents Management Information Bases MIBs Bridge MIB AToM MIB LE Client MIBInterface Evolution MIB Ncdchass MIB private Security 5Local Management Protocol Access Store-and-Forward Mode Tuning Terminating them as erred frames Timeout TuningCut-Through Mode Card for extended periods of time. This usually occurs when Console Passwords 3Com Bulletin Board ServicesService On-Line Technical Table A-2Automated Fax Service Press Enter to see the Ask3Com main menuCountry Fax Number Country Telephone Number Table A-3Telephone Support Country Telephone Number Fax Number Table A-6Local Access NumbersTable A-4Network Supplier Support Table A-5Obtaining an RMA Number Troubleshooting Cleaning Dirty Fiber Optic Cables Related Diagnostic Procedures Interfaces Fast Ethernet Card C SpecificationsFast Ethernet Switching Physical Environmental Indicators Standards Compliance Glossary Equipment DCE Interface NNI Protocol Out-of-bandPoint-to-point call Call Interface UNI Numbers Index BUS Elan LEC ID NNI STP VCC Index