Concept Guide

Congure 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 EMC Networking OS does a
match between all of those match commands. If there are multiple match commands with dierent parameters, Dell EMC 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 specied 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.
DellEMC(conf)#route-map force permit 10
DellEMC(config-route-map)#match tag 1000
DellEMC(config-route-map)#match tag 2000
DellEMC(config-route-map)#match tag 3000
Example of the match Command to Match All Specied Values
In the next example, there is a match only if a route has both of the specied 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 dierent instances of the same route-map, then it’s sucient if a permit match happens in any instance of that route-
map.
DellEMC(conf)#route-map force permit 10
DellEMC(config-route-map)#match tag 1000
DellEMC(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 EMC 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
DellEMC(conf)#route-map force permit 10
DellEMC(config-route-map)#match tag 1000
DellEMC(conf)#route-map force deny 20
DellEMC(config-route-map)#match tag 1000
DellEMC(conf)#route-map force deny 30
DellEMC(config-route-map)#match tag 1000
Conguring Match Routes
To congure 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)
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