Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.112.1P1 - Page 127
Configuring Match Routes, Route Map Filters
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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, Dell Networking OS does a match between all of those match commands. If there are multiple match commands with different parameters, Dell Networking OS 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 The following example shows using 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 Example of the match Command to Match All Specified Values 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 routemap. 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, Dell Networking OS 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 Configuring Match Routes To configure match criterion for a route map, use the following commands. • Match routes with the same AS-PATH numbers. CONFIG-ROUTE-MAP mode match as-path as-path-name • Match routes with COMMUNITY list attributes in their path. CONFIG-ROUTE-MAP mode match community community-list-name [exact] Access Control Lists (ACLs) 127
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