Cisco Systems BC-109 manual Configure Fast-Switching SRB over Fddi, Configure SRB over Frame Relay

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Configure Source-Route Bridging

Configure Fast-Switching SRB over FDDI

Fast-Switching SRB over FDDI enhances performance. For example, if you want to use access-lists, fast-switching SRB over FDDI provides fast performance and access-list filters capability.

To configure fast-switching SRB over FDDI, use the following commands, beginning in global configuration mode:

Step

Command

Purpose

1

interface fddi slot/port

Configure an FDDI interface.

 

 

 

2

source-bridgelocal-ring bridge-number

Enable source-route bridging.

 

target-ring

 

 

 

 

3

source-bridge spanning

Enable source-bridge spanning.

 

 

 

4

source-bridge route-cache

Enable fast-switching.

 

 

 

5

multiring protocol-keyword

Enable the collection and use of RIF

 

 

information.

 

 

 

Configure SRB over Frame Relay

Cisco IOS software offers the ability to encapsulate source-route bridging traffic using RFC 1490 Bridged 802.5 encapsulation. This provides SRB over Frame Relay functionality that is interoperable with other vendors’ implementations of SRB over Frame Relay and with some vendors’ implementations of FRAS BAN.

Note In the initial release, SRB over Frame Relay does not support the Cisco IOS software proxy explorer, automatic spanning-tree, or LAN Network Manager functions.

To configure SRB over Frame Relay, use the following commands in interface configuration mode:

Step

Command

Purpose

1

interface serial number

Specify the serial port.

 

 

 

2

encapsulation frame-relay

Enable Frame Relay encapsulation.

 

 

 

3

interface serial slot/port.subinterface-number

Configure a Frame Relay

 

point-to-point

point-to-point subinterface.

 

 

 

4

frame-relay interface-dlci dlci ietf

Configure a DLCI number for the

 

 

point-to-point subinterface.

 

 

 

5

source-bridgesource-ring-number bridge-number

Assign a ring number to the Frame

 

target-ring-number conserve-ring

Relay permanent virtual circuit.

 

 

 

Enable the Forwarding and Blocking of Spanning-Tree Explorers

When trying to determine the location of remote destinations on a source-route bridge, the source device will need to send explorer packets. Explorer packets are used to collect routing information field (RIF) information. The source device can send spanning-tree explorers or all-routes explorers. Note that some older IBM devices generate only all-routes explorer packets, but many newer IBM devices are capable of generating spanning-tree explorer packets.

A spanning-tree explorer packet is an explorer packet that is sent to a defined group of nodes that comprise a statically configured spanning tree in the network. In contrast, an all-routes explorer packet is an explorer packet that is sent to every node in the network on every path.

BC-114Bridging and IBM Networking Configuration Guide

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Contents Configuring Source-Route Bridging SRB Configuration Task ListConfigure Source-Route Bridging Configure a Dual-Port BridgeConfigure a Multiport Bridge Using a Virtual Ring Multiple Dual-Port BridgesDefine a Ring Group in SRB Context Source-bridge ring-group ring-groupNo source-bridge ring-group ring-group Interface fddi slot/port Configure SRB over FddiEnable SRB and Assign a Ring Group to an Interface Source-bridge route-cache cbusConfigure Fast-Switching SRB over Fddi Configure SRB over Frame RelayEnable the Automatic Spanning-Tree Function Limit the Maximum SRB Hops Configure Bridging of Routed Protocols Enable Use of the RIFConfigure a Static RIF Entry Configure the RIF Timeout IntervalOverview of SR/TLB Following notes and caveats apply to all uses of SR/TLB Enable Translation Compatibility with IBM 8209 Bridges Enable Bridging between Transparent Bridging and SRBDisable Fast-Switched SR/TLB No source-bridge transparent ring-group fastswitchEnable Standard Token Ring LLC2-to-Ethernet LLC2 Conversion Enable Token Ring LLC2-to-Ethernet ConversionEnable 0x80d5 Processing Source-bridge sap-80d5 dsapConfigure NetBIOS Support Specify Timeout and Enable NetBIOS Name Caching Source-bridge proxy-netbios-onlyCreate Static Entries in the NetBIOS Name Cache Configure the NetBIOS Cache Name LengthEnable NetBIOS Proxying Specify Dead-Time Intervals for NetBIOS PacketsConfigure LNM Support Netbios name-cache query-timeout secondsNetbios name-cache recognized-timeout seconds LNM Linking to a Source-Route Bridge on Each Local Ring How a Router Works with LNM LAN Network Manager Monitoring and TranslatingDisable LNM Functionality Disable Automatic Report Path Trace Function Enable Other LRMs to Change Router ParametersApply a Password to an LNM Reporting Link Enable LNM ServersChange Reporting Thresholds Change an LNM Reporting Interval Monitor LNM OperationLnm softerr milliseconds Configure NetBIOS Access Filters Configure NetBIOS Access Filters Using Station NamesSecure the SRB Network Netbios access-list bytes name permit deny offset Configure NetBIOS Access Filters Using a Byte OffsetNetbios access-list host name permit deny pattern Netbios input-access-filter bytes nameConfigure Administrative Filters for Token Ring Traffic Netbios output-access-filter bytes nameFilter Frames by Protocol Type Filter Frames by Vendor Code Filter Source AddressesFilter Destination Addresses Access Expression Example Configure Access Expressions Optimize Access ExpressionsAlter Access Lists Used in Access Expressions Tune the SRB NetworkEnable or Disable the Source-Route Fast-Switching Cache Enable or Disable the SSE Establish the Connection Timeout IntervalOptimize Explorer Processing Controlling Explorer Storms in Redundant Network Topologies Configure Proxy Explorers Establish SRB Interoperability with TI MAC FirmwareMac-address ieee-address Report Spurious Frame-Copied Errors Monitor and Maintain the SRB NetworkSRB Configuration Examples Source-bridge tcp-queue-max numberDual-Port Source-Route Bridge Configuration Basic SRB with Spanning-Tree Explorers ExampleOptimized Explorer Processing Configuration Example SRB-Only ExampleSRB and Routing Certain Protocols Example Multiport SRB ExampleConfiguration for Router a SRB with Multiple Virtual Ring Groups ExampleConfiguration for Router B SRB over Fddi Configuration ExamplesSRB over Fddi Fast-Switching Example Router aSRB over Frame Relay Configuration Example Frad Using SRB over Frame Relay to Connect to a Cisco RouterConfiguration on Router C Configuration of Router aConfiguration on Router B Adding a Static RIF Cache Entry ExampleAdding a Static RIF Cache Entry for a Two-Hop Path Example SR/TLB for a Simple Network ExampleBC-154Bridging and IBM Networking Configuration Guide SR/TLB with Access Filtering Example Example of a Bit-Swapped AddressNetBIOS Support with a Static NetBIOS Cache Entry Example Specifying a Static EntryWayfarer# show lnm config LNM for a Simple Network ExampleLNM for a More Complex Network Example NetBIOS Access Filters Example Filtering Bridged Token Ring Packets to IBM Machines Example Shows a router connecting four Token Rings Creating Access Filters Example Following access expression would resultAccess Filters Example Fast-Switching ExampleAutonomous Switching Example
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