Cisco Systems BC-109 manual Shows a router connecting four Token Rings

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Administrative Access Filters—Filtering SNAP Frames on Output Example

Administrative Access Filters—Filtering SNAP Frames on Output Example

Figure 68 shows a router connecting four Token Rings.

Figure 68 Router Filtering SNAP Frames on Output

Token

Ring 3

T2

Router A

Token T1

Ring 2

T0

Token

Ring 1

Ring group 5

Token

T3 Ring 4

S1277a

The following example allows only AppleTalk Phase 2 packets to be source-route bridged between Token Rings 0 and 1, and allows Novell packets only to be source-route bridged between Token Rings 2 and 3.

source-bridge ring-group 5

!

interface tokenring 0

ip address 131.108.1.1 255.255.255.0 source-bridge 1000 1 5 source-bridge spanning source-bridge input-type-list 202

!

interface tokenring 1

ip address 131.108.11.1 255.255.255.0 source-bridge 1001 1 5 source-bridge spanning source-bridge input-type-list 202

!

interface tokenring 2

ip address 131.108.101.1 255.255.255.0 source-bridge 1002 1 5 source-bridge spanning source-bridge input-lsap-list 203

!

interface tokenring 3

ip address 131.108.111.1 255.255.255.0 source-bridge 1003 1 5 source-bridge spanning source-bridge input-lsap-list 203

!

!SNAP type code filtering

!permit ATp2 data (0x809B)

!permit ATp2 AARP (0x80F3)

access-list 202 permit 0x809B 0x0000 access-list 202 permit 0x80F3 0x0000 access-list 202 deny 0x0000 0xFFFF

!

!LSAP filtering

!permit IPX (0xE0E0)

Configuring Source-Route Bridging BC-161

Image 53

Contents SRB Configuration Task List Configuring Source-Route BridgingConfigure a Dual-Port Bridge Configure Source-Route BridgingMultiple Dual-Port Bridges Configure a Multiport Bridge Using a Virtual RingNo source-bridge ring-group ring-group Define a Ring Group in SRB ContextSource-bridge ring-group ring-group Enable SRB and Assign a Ring Group to an Interface Configure SRB over FddiInterface fddi slot/port Source-bridge route-cache cbusConfigure SRB over Frame Relay Configure Fast-Switching SRB over FddiEnable the Automatic Spanning-Tree Function Limit the Maximum SRB Hops Enable Use of the RIF Configure Bridging of Routed ProtocolsConfigure the RIF Timeout Interval Configure a Static RIF EntryOverview of SR/TLB Following notes and caveats apply to all uses of SR/TLB Disable Fast-Switched SR/TLB Enable Bridging between Transparent Bridging and SRBEnable Translation Compatibility with IBM 8209 Bridges No source-bridge transparent ring-group fastswitchEnable 0x80d5 Processing Enable Token Ring LLC2-to-Ethernet ConversionEnable Standard Token Ring LLC2-to-Ethernet LLC2 Conversion Source-bridge sap-80d5 dsapConfigure NetBIOS Support Source-bridge proxy-netbios-only Specify Timeout and Enable NetBIOS Name CachingEnable NetBIOS Proxying Configure the NetBIOS Cache Name LengthCreate Static Entries in the NetBIOS Name Cache Specify Dead-Time Intervals for NetBIOS PacketsNetbios name-cache recognized-timeout seconds Configure LNM SupportNetbios name-cache query-timeout seconds LNM Linking to a Source-Route Bridge on Each Local Ring LAN Network Manager Monitoring and Translating How a Router Works with LNMDisable LNM Functionality Enable Other LRMs to Change Router Parameters Disable Automatic Report Path Trace FunctionChange Reporting Thresholds Apply a Password to an LNM Reporting LinkEnable LNM Servers Lnm softerr milliseconds Change an LNM Reporting IntervalMonitor LNM Operation Secure the SRB Network Configure NetBIOS Access FiltersConfigure NetBIOS Access Filters Using Station Names Netbios access-list host name permit deny pattern Configure NetBIOS Access Filters Using a Byte OffsetNetbios access-list bytes name permit deny offset Netbios input-access-filter bytes nameFilter Frames by Protocol Type Configure Administrative Filters for Token Ring TrafficNetbios output-access-filter bytes name Filter Destination Addresses Filter Frames by Vendor CodeFilter Source Addresses Access Expression Example Optimize Access Expressions Configure Access ExpressionsTune the SRB Network Alter Access Lists Used in Access ExpressionsEnable or Disable the Source-Route Fast-Switching Cache Optimize Explorer Processing Enable or Disable the SSEEstablish the Connection Timeout Interval Controlling Explorer Storms in Redundant Network Topologies Mac-address ieee-address Configure Proxy ExplorersEstablish SRB Interoperability with TI MAC Firmware Monitor and Maintain the SRB Network Report Spurious Frame-Copied ErrorsSource-bridge tcp-queue-max number SRB Configuration ExamplesBasic SRB with Spanning-Tree Explorers Example Dual-Port Source-Route Bridge ConfigurationSRB-Only Example Optimized Explorer Processing Configuration ExampleMultiport SRB Example SRB and Routing Certain Protocols ExampleSRB with Multiple Virtual Ring Groups Example Configuration for Router aSRB over Fddi Fast-Switching Example SRB over Fddi Configuration ExamplesConfiguration for Router B Router aFrad Using SRB over Frame Relay to Connect to a Cisco Router SRB over Frame Relay Configuration ExampleConfiguration on Router B Configuration of Router aConfiguration on Router C Adding a Static RIF Cache Entry ExampleSR/TLB for a Simple Network Example Adding a Static RIF Cache Entry for a Two-Hop Path ExampleBC-154Bridging and IBM Networking Configuration Guide Example of a Bit-Swapped Address SR/TLB with Access Filtering ExampleSpecifying a Static Entry NetBIOS Support with a Static NetBIOS Cache Entry ExampleLNM for a Simple Network Example Wayfarer# show lnm configLNM 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 Following access expression would result Creating Access Filters ExampleFast-Switching Example Access Filters ExampleAutonomous Switching Example