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, the system does a match between
all of those match commands. If there are multiple match commands with dierent 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 specied in the match commands.
Example of the match Command to Match Any of Several Values
Example of the match Command to Match All Specied 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 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.
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
Conguring Match Routes
To congure match criterion for a route map, use the following commands.
• Match routes whose next hop is a specic interface.
CONFIG-ROUTE-MAP mode
match interface interface
The parameters are:
– For a Loopback interface, enter the keyword loopback then a number between zero (0) and 16383.
– For a 10-Gigabit Ethernet interface, enter the keyword tengigabitEthernet then the slot/port information.
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Access Control Lists (ACLs)