Cisco Systems BC-109 manual Disable LNM Functionality

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Configure LNM Software on the Management Stations to Communicate with the Router

When SRB is enabled on the router, configuring the Cisco IOS software to perform the functions of an IBM Bridge for communication with LNM occurs automatically. Therefore, if SRB has been enabled, you do not need to perform any tasks to enable LNM support. However, the LNM software residing on a management station on a Token Ring on the network should be configured to properly communicate with the router.

There are several options for modifying LNM parameters in the Cisco IOS software, but none are required for basic functionality. For example, because users can now modify the operation of the Cisco IOS software through SNMP as well as through LNM, there is an option to exclude a user from modifying the Cisco IOS software configuration through LNM. You also can specify which of the three LNM services (CRS, REM, RPS) the source-route bridge will perform.

To configure LNM support, perform the tasks in the following sections:

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Configure LNM Software on the Management Stations to Communicate with the Router

Disable LNM Functionality

Disable Automatic Report Path Trace Function

Prevent LNM Stations from Modifying Cisco IOS Software Parameters

Enable Other LRMs to Change Router Parameters

Apply a Password to an LNM Reporting Link

Enable LNM Servers

Change Reporting Thresholds

Change an LNM Reporting Interval

Enable the RPS Express Buffer Function

Monitor LNM Operation

Configure LNM Software on the Management Stations to Communicate with the Router

Because configuring an LNM station is a fairly simple task and is well covered in the LNM documentation, it is not covered in depth here. However, it is important to mention that you must enter the MAC addresses of the interfaces comprising the ports of the bridges as adapter addresses. When you configure the router as a multiport bridge, configuring an LNM station is complicated by the virtual ring that is involved. The basic problem extends from the fact that LNM is designed to only understand the concept of a two-port bridge, and the router with a virtual ring is a multiport bridge. The solution is to configure a virtual ring into the LNM Manager station as a series of dual-port bridges.

Disable LNM Functionality

Under some circumstances, you can disable all LNM server functions on the router without having to determine whether to disable a specific server, such as the ring parameter server or the ring error monitor on a given interface.

To disable LNM functionality, use the following command in global configuration mode:

Command

Purpose

lnm disabled

Disable LNM functionality.

 

 

Configuring Source-Route Bridging BC-129

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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 RingDefine a Ring Group in SRB Context Source-bridge ring-group ring-groupNo source-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 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 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 FunctionApply 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 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 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 Optimize Access Expressions Configure Access ExpressionsTune the SRB Network Alter Access Lists Used in Access ExpressionsEnable 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 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
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