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Cisco Systems BC-109 manual Apply a Password to an LNM Reporting Link, Enable LNM Servers

Models: BC-109

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lnm alternate number

Apply a Password to an LNM Reporting Link

To enable other LRMs to change router parameters, use the following command in interface configuration mode:

Command	Purpose
lnm alternate number	Enable a LRM other than that
	connected through link 0 to change
	router parameters.

Apply a Password to an LNM Reporting Link

Each reporting link has its own password that is used not only to prevent unauthorized access from an LRM to a bridge but to control access to the different reporting links. This is important because it is possible to change parameters through some reporting links.

To apply a password to an LNM reporting link, use the following command in interface configuration mode:

Command	Purpose
lnm password number string	Apply a password to an LNM
	reporting link.

Enable LNM Servers

As in an IBM bridge, the router provides several functions that gather information from a local Token Ring. All of these functions are enabled by default, but also can be disabled. The LNM servers are explained in the section “How a Router Works with LNM” earlier in this chapter.

To enable LNM servers, use one or more of the following commands in interface configuration mode:

Command	Purpose
lnm crs	Enable the LNM Configuration
	Report Server (CRS).

lnm rem	Enable the LNM Ring Error Monitor
	(REM).

lnm rps	Enable the LNM Ring Parameter
	Server (RPS).

Change Reporting Thresholds

The Cisco IOS software sends a message to all attached LNMs whenever it begins to drop frames. The threshold at which this report is generated is based on a percentage of frames dropped compared with those forwarded. This threshold is configurable, and defaults to a value of 0.10 percent. You can configure the threshold by entering a single number, expressing the percentage loss rate in hundredths of a percent. The valid range is 0 to 9999.

To change reporting thresholds, use the following command in interface configuration mode:

Command	Purpose
lnm loss-threshold number	Change the threshold at which the
	Cisco IOS software reports the
	frames-lost percentage to LNM.

Configuring Source-Route Bridging BC-131

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Cisco Systems BC-109 manual Apply a Password to an LNM Reporting Link, Enable LNM Servers, Change Reporting Thresholds

Contents

Configuring Source-Route Bridging SRB Configuration Task ListConfigure a Dual-Port Bridge Configure Source-Route BridgingFigure 46 Multiple Dual-Port Bridges Configure a Multiport Bridge Using a Virtual RingConfigure a Multiport Bridge Using a Virtual Ring Define a Ring Group in SRB Context Enable SRB and Assign a Ring Group to an Interface Configure SRB over FDDIBC-114 Bridging and IBM Networking Configuration Guide Configure Fast-Switching SRB over FDDIConfigure SRB over Frame Relay Enable the Forwarding and Blocking of Spanning-Tree Explorersno source-bridge spanning Enable the Automatic Spanning-Tree Functionsource-bridge spanning source-bridge spanning bridge-group path-cost path-cost Limit the Maximum SRB Hopsbridge bridge-group protocol ibm source-bridge spanning bridge-groupEnable Use of the RIF Configure Bridging of Routed ProtocolsConfigure the RIF Timeout Interval Configure a Static RIF EntryOverview of SR/TLB The 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 Enable Standard Token Ring LLC2-to-Ethernet LLC2 Conversion Enable Token Ring LLC2-to-Ethernet ConversionEnable 0x80d5 Processing Configure NetBIOS Support Specify Timeout and Enable NetBIOS Name Caching Enable the Proxy Explorers Feature on the Appropriate InterfaceSpecify Dead-Time Intervals for NetBIOS Packets Configure the NetBIOS Cache Name LengthEnable NetBIOS Proxying Create Static Entries in the NetBIOS Name CacheConfigure LNM Support Configure LNM SupportConfiguring Source-Route Bridging BC-127 BC-128 Bridging and IBM Networking Configuration Guide How a Router Works with LNMDisable LNM Functionality lnm pathtrace-disabled all origin Disable Automatic Report Path Trace FunctionEnable Other LRMs to Change Router Parameters Prevent LNM Stations from Modifying Cisco IOS Software Parameterslnm password number string Apply a Password to an LNM Reporting LinkEnable LNM Servers Change Reporting ThresholdsMonitor LNM Operation Enable the RPS Express Buffer FunctionChange an LNM Reporting Interval Secure the SRB Network Configure NetBIOS Access FiltersConfigure NetBIOS Access Filters Using Station Names netbios input-access-filter bytes name Configure NetBIOS Access Filters Using a Byte Offsetnetbios access-list host name permit deny pattern netbios access-list bytes name permit deny offsetFilter Frames by Protocol Type Configure Administrative Filters for Token Ring Trafficsource-bridge input-lsap-list access-list-number Filter Frames by Vendor CodeFilter Source Addresses Filter Destination AddressesConfigure Access Expressions that Combine Administrative Filters Optimize Access Expressions Configure Access ExpressionsTune the SRB Network Alter Access Lists Used in Access ExpressionsDisable fast-switching Enable or Disable the Source-Route Fast-Switching CacheEnable or Disable the Source-Route Autonomous-Switching Cache Enable fast-switchingEnable the SSE function Enable or Disable the SSEEstablish the Connection Timeout Interval Optimize Explorer Processingsource-bridge explorerq-depth depth Establish SRB Interoperability with TI MAC Firmware Configure Proxy ExplorersMonitor and Maintain the SRB Network Report Spurious Frame-Copied ErrorsSRB Configuration Examples Basic SRB with Spanning-Tree Explorers Example SRB with Automatic Spanning-Tree Function Configuration Example SRB with Automatic Spanning-Tree Function Configuration ExampleOptimized Explorer Processing Configuration Example SRB-Only ExampleS1103a SRB and Routing Certain Protocols ExampleMultiport SRB Example SRB with Multiple Virtual Ring Groups Example Configuration for Router ASRB with Multiple Virtual Ring Groups Example Configuring Source-Route Bridging BC-149Router A SRB over FDDI Configuration ExamplesSRB over FDDI Fast-Switching Example Configuration for Router BSRB over Frame Relay Configuration Example Adding a Static RIF Cache Entry Example Configuration of Router AConfiguration on Router B Configuration on Router CBridge Adding a Static RIF Cache Entry for a Two-Hop Path ExampleSR/TLB for a Simple Network Example Now you are ready to determine two things SR/TLB with Access Filtering Example BC-156 Bridging and IBM Networking Configuration Guide NetBIOS Support with a Static NetBIOS Cache Entry ExampleLNM for a Simple Network Example Physical configuration LNM for a More Complex Network ExampleSRB Configuration Examples BC-158 Bridging and IBM Networking Configuration GuideNetBIOS Access Filters Example BC-160 Bridging and IBM Networking Configuration Guide Filtering Bridged Token Ring Packets to IBM Machines ExampleConfiguring Source-Route Bridging BC-161 Administrative Access Filters-Filtering SNAP Frames on Output ExampleFigure 68 shows a router connecting four Token Rings Administrative Access Filters-Filtering SNAP Frames on Output ExampleCreating Access Filters Example Figure 69 Network Configuration Using NetBIOS Access Filters Access Filters ExampleFast-Switching Example Access Filters ExampleBC-164 Bridging and IBM Networking Configuration Guide Autonomous Switching ExampleSRB Configuration Examples