Cabletron Systems 9A128-01 manual Changing Bridge Spanning Tree Parameters

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Bridging

Path Cost

Displays the cost that this port will contribute to the calculation of the overall Root path cost in a Configuration BPDU transmitted by this bridge port. You can lower a port’s Path Cost to make the port more competitive in the selection of the Designated Port – for example, you may want to assign a lower path cost to a port on a higher performance bridge. The allowable range is 1 to 65535.

Designated Cost

Displays the cost of the path to the Root Bridge of the Designated Port on the LAN to which this port is attached. This cost is added to the Path Cost to test the value of the Root Path Cost parameter received in Configuration BPDUs.

Designated Root

Displays the unique bridge identifier of the bridge that is assumed to be the Root Bridge.

Designated Bridge

Displays the network address portion of the Bridge ID (MAC address/priority component) for the bridge that is believed to be the Designated Bridge for the LAN associated with this port.

The Designated Bridge ID, along with the Designated Port and Port Identifier parameters for the port, is used to determine whether this port should be the Designated Port for the LAN to which it is attached. The Designated Bridge ID is also used to test the value of the Bridge Identifier parameter in received BPDUs.

Designated Port

Displays the network address portion of the Port ID (which includes a manageable Priority component) of the port believed to be the Designated Port for the LAN associated with this port.

The Designated Port ID, along with the Designated Bridge and Port Identifier parameters for the port, is used to determine whether this port should be the Designated Port for the LAN to which it is attached. Management also uses it to determine the Bridged LAN topology.

Topology

This indicates how many times the bridge’s Topology Change flag has been changed since the selected module was last powered up or initialized. The Topology Change flag increments each time a bridge enters or leaves the network, or when the Root Bridge ID changes.

Changing Bridge Spanning Tree Parameters

The Bridge Spanning Tree window allows you to update the following parameters for your bridge. When you have finished making changes to the

following individual parameters, you must click on at the bottom of the Spanning Tree window to write the changes to the selected module.

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Bridge Spanning Tree

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Contents Cabletron Systems Virus Disclaimer Page Restricted Rights Notice Page Contents Index Chapter Fddi ManagementChapter Bridging Introduction Using This GuideRelated Reading IP Address Software ConventionsCommon Window Fields Device NameLocation Using ButtonsUsing On-line Help Getting HelpFTP Getting Help from the Cabletron Systems Global Call CenterFirmware Versions Supported 9A128-01 Module View Front Panel Information Viewing Module InformationPort Status Boot PromConnection Status UpTimeDate Menu StructureTime Device Menu A128-01 Module View Menu StructurePort Status Menu Board Menus Fddi MenuUtilities Menu Help MenuPort Menus Port Status DisplaysBridge Port Status Displays Selecting a Port Status ViewFddi Port Status Displays Bridge Port StateBridge Mapping Bridge Port Status Color CodesLER Estimate Connection StateFddi Port Status Color Codes Chassis Manager WindowModule Type Viewing Hardware TypesDevice Type Module Type Window Viewing I/F Summary InformationInterface Performance Statistics/Bar Graphs IndexDescription StaLoad Raw CountsInterface Statistics Window RateNon-Unicast ErrorAddress UnicastPackets Transmitted Transmit only Using the Find Source Address FeaturePackets Received Received only Transmit Queue Size Transmit onlyManaging the Hub Setting the Device Date and TimeBridge Ports Enabling and Disabling PortsModule Ports ATM Configuration Accessing the ATM Connections WindowConnection Data ATM ConfigurationVPI SettingsAdding a New Connection Configuring ConnectionsDeleting a Connection ATM Configuration Configuring Connections Fddi Management Fddi Management ConfigurationMAC State Neg. Negotiated SMT VersionReq. Requested Target Token Rotation Time MAC Path Concentrator M PortsConcentrator Non-M Ports Number of MACsConnection Policy 15 32,768 a permanently set value for this bit Number of Nodes Address ModeStation List Upstream Neighbor Stations PanelNode Class TopologyPerformance Lost Frames Frame ErrorsTransmit Frames Receive FramesFddi Management Performance Bridging Bridging Bridge Status WindowBridge Address Up TimeBridge State on Interface Interface TypeConfiguring Duplex Modes Enabling and Disabling Bridging Performance Graphs Bridge StatisticsForwarded Green Configuring the Bridge Performance Graphs Total Errors RedFiltered Magenta Xmitted BlueXmitted ErrorsForwarded FilteredForwarded from Interface Statistics WindowForwarded to Description Using Source Addressing Port Source Addresses Window Setting the Ageing TimeBridge Spanning Tree Bridge Priority Configuring the Bridge Spanning Tree WindowProtocol Root BridgeRoot Cost Root PortHold Time Forwarding DelayHello Time Max AgeChanging Bridge Spanning Tree Parameters Changing Hello Time Changing Bridge PriorityChanging the Spanning Tree Algorithm Protocol Type Changing Port Priority Changing Forwarding Delay TimeChanging Max Age Time Changing Path Cost Filtering DatabaseBridging Bridging Ageing Time ListNumber CapacityPort Filtering Configuring the Filtering DatabaseReceive Port Changing the Port Filtering Action Altering the Ageing TimeChanging the Type of Entry Changing the Receive PortClearing All Permanent, Static, or Dynamic Entries Bridging Filtering Database Index Index-2 Index-3 Index Index-4
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