10/100 Mbps transmission speed, Auto-negotiation | 3Com 7600

Fast Ethernet 11-3

Q10/100 Mbps transmission speed

These capabilities differ between the Tx and Fx port types. They are presented in the following table and discussed in the paragraphs below.

Table 11-1Fast Ethernet Port Capabilities

	Port type
Capability		Tx Port	Fx Port

Auto-negotiation		yes	no

Full/half duplex		yes	yes

10/100 Mbps		yes	no (100 Mbps
10/100 Mbps			only)

Auto-negotiation

The 7600 Card has the capability of negotiating with the device with which it is to communicate prior to data transfer in order to determine its mode and speed capabilities (auto-negotiation). The 7600 Card then automatically adjusts its data transmission mode and speed to match that of the communicating device as detailed in the next two sections. Auto-negotiation is set for each port separately and may be set individually for either transmission mode or speed. If auto-negotiation is not specified, the parameter must be set manually. The auto-negotiation capability is available for Tx ports (copper) only.

Full or Half Duplex Mode

Fast Ethernet as implemented in the 7600 Card can communicate in either full or half duplex mode, for both Tx and Fx port types. The duplex auto-negotiation capability is available for Tx ports only. The Fx ports must be set manually to either full or half duplex. When duplex auto-negotiation is selected, the mode in which the 7600 Card chooses to operate is determined by the communication modes available in the device with which it is communicating. If the device with which it is communicating also has a full-duplex mode (such as another 7600 Card), then it communicates in full-duplex, otherwise it communicates in half-duplex.

Image 138

3Com 7600 manual 10/100 Mbps transmission speed, Auto-negotiation, Full or Half Duplex Mode

Contents

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