Cabletron Systems 9E312, 9E423 manual Duplex Modes Window

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9E312/9E423 Module Bridging

Duplex Modes

WARNING

The Ethernet switch interfaces on a 9E312/9E423 Module will support Full Duplex Switched Ethernet (FDSE) mode. Enabling Full Duplex mode on an interface allows the interface to receive and transmit packets at the same time. On an Ethernet connection that is not using full duplex mode, the interface can transmit or receive packets. The interface has to wait for one activity to be completed before switching to the next activity (receive or transmit). Using the full duplex mode allows for faster transmission for Ethernet connections.

Full Duplex should only be enabled on an interface that has a connection to a single destination address at the other end of the connection (i.e., it is not a segment with an attached repeater cascading the connection to multiple destination addresses).

Full Duplex mode disables the collision detection circuitry at the interface, so that both Transmit and Receive wires can be used simultaneously. With a single destination address at the other end of the connection (for example, if the connection was to a full duplex interface on another switching module, or if a single ﬁle server was connected to the full duplex switch port), this essentially doubles the available bandwidth from 10 Mbit/sec to 20 Mbit/sec. Note that the interface at the other end of the connection must also have Full Duplex enabled at the attached interface.

Full Duplex mode must be disabled if the interface is communicating with multiple destinations simultaneously (i.e., if a repeater is cascaded from the interface), since Ethernet relies on Collision Sense for proper operation.

The Duplex Modes Window

The Duplex Modes window allows you to enable/disable (turn on/off) Full Duplex mode capability for each bridging interface on your device. The window lists each interface on the device and whether Full Duplex is “ON” or “OFF.”

To access the Duplex Modes Window from the Bridge Status window:

1.Click on . A pull-down menu will appear.

2.Click on Duplex Mode.... The 9E312/9E423 Module Duplex Modes window, Figure 3-9, will appear.

3-28	Duplex Modes

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Contents Page Virus Disclaimer Page Restricted Rights Notice Page Contents 9E312/9E423 Module Bridging IndexIntroduction Introduction Using the 9E312 and 9E423 User’s GuideRelated Manuals Common 9E312 and 9E423 Window Fields Software ConventionsUsing Buttons and Menus Using On-line Help Getting HelpGetting Help from Cabletron Systems Technical Support FTP 9E312 and 9E423 FirmwareIntroduction 9E312 and 9E423 Firmware 9E312/9E423 Module View 9E312/9E423 Module View Viewing Module InformationConnection Status Front Panel InformationMenu Structure Device Menu E312/9E423 Module View Menu StructureUtilities Menu Help MenuBridge Menu Bridge Port Menu 9E312/9E423 Module Port Status DisplayChassis Manager Window Setting the Device Date and Time Managing the ModuleViewing the Device Type Edit Time Window Enabling and Disabling Bridge Ports Using the Find Source Address FeatureFind Source Address Window Summary InformationDescription Interface Description FieldsIndex TypeRaw Counts Interface Performance Statistics/Bar GraphsInterface Detail Window LoadRate Unicast Interface Detail Window StatisticsUnknown Protocol ErrorMulticast DiscardedMaking Sense of Interface Statistics Testing and Disabling the Current InterfacePackets Received Packets TransmittedUsing the Applications Pull-down menu 9E312/9E423 Module View Summary Information Bridging Basics 9E312/9E423 Module BridgingMore on Transparent Bridging An Overview of Remote Bridge ManagementBridge Status Window Bridge State on Interface Bridge Status Window Information FieldsInterface Type Interface AddressInterface Speed Bridge Statistics Enabling and Disabling BridgingPerformance Graphs Filtered Magenta Errors RedBridge Performance Graph Window Fields Frames Forwarded GreenConﬁguring the Bridge Performance Graphs Interface Statistics WindowAddress Interface Statistics Window FieldsNon-Unicast Bridge Spanning Tree9E312/9E423 Module Bridging Conﬁguring the Bridge Spanning Tree Window Bridge Level FieldsBridge Priority Protocol Root BridgeRoot Cost Root PortBridge Port Level Fields Designated Bridge Path CostDesignated Cost Designated RootChanging Bridge Spanning Tree Parameters Changing Bridge PriorityChanging the Spanning Tree Algorithm Protocol Type Changing Forwarding Delay Time Changing Hello TimeChanging Max Age Time Filtering Database Changing Port PriorityChanging Path Cost 9E312/9E423 Module Bridging Filtering Database Window Capacity Filtering Database Window FieldsList NumberPort Filtering Conﬁguring the Filtering DatabaseSource Port Receive PortAltering the Ageing Time Changing the Type of EntryChanging the Receive Port Adding or Deleting Individual Entries Changing the Port Filtering ActionClearing All Permanent, Static, or Dynamic Entries Using Port Source AddressingDevice Ageing Time Window Setting the Ageing TimeDuplex Modes Window Duplex ModesDuplex Modes Window Fields InterfaceFull Duplex Setting the Duplex Mode Index Index-2