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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Configure Route Map Filters

Within ROUTE-MAP mode, there are match and set commands.

  • match commands search for a certain criterion in the routes.
  • set commands change the characteristics of routes, either adding something or specifying a level.

When there are multiple match commands with the same parameter under one instance of route-map, the system does a match between all of those match commands. If there are multiple match commands with different parameters, the system does a match ONLY if there is a match among ALL the match commands.

In the following example, there is a match if a route has any of the tag values specified in the match commands.

Example of the match Command to Match Any of Several Values

Dell(conf)#route-map force permit 10
                                 Dell(config-route-map)#match tag 1000
                                 Dell(config-route-map)#match tag 2000
                                 Dell(config-route-map)#match tag 3000
                              

In the next example, there is a match only if a route has both of the specified characteristics. In this example, there a match only if the route has a tag value of 1000 and a metric value of 2000.

Also, if there are different instances of the same route-map, then it’s sufficient if a permit match happens in any instance of that route-map.

Dell(conf)#route-map force permit 10
                                 Dell(config-route-map)#match tag 1000
                                 Dell(config-route-map)#match metric 2000
                              

In the following example, instance 10 permits the route having a tag value of 1000 and instances 20 and 30 deny the route having a tag value of 1000. In this scenario, the system scans all the instances of the route-map for any permit statement. If there is a match anywhere, the route is permitted. However, other instances of the route-map deny it.

Example of the match Command to Permit and Deny Routes

Dell(conf)#route-map force permit 10
                                 Dell(config-route-map)#match tag 1000
                                 
                                 Dell(conf)#route-map force deny 20
                                 Dell(config-route-map)#match tag 1000
                                 
                                 Dell(conf)#route-map force deny 30
                                 Dell(config-route-map)#match tag 1000
                              

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