Reference Guide

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Configure route map filters
Within the ROUTE-MAP mode, there are match and set commands. Basically, match commands search
for a certain criterion in the routes and the
set commands change the characteristics of those routes, either
adding something or specifying a level.
When there are multiple match commands of the same parameter under one instance of route-map, then
FTOS does a match between either of those match commands. If there are multiple match commands of
different parameter, then FTOS does a match ONLY if there is a match among ALL match commands.
The following example explains better:
Example 1
FTOS(conf)#route-map force permit 10
FTOS(config-route-map)#match tag 1000
FTOS(config-route-map)#match tag 2000
FTOS(config-route-map)#match tag 3000
In the above route-map, if a route has any of the tag value specified in the match commands, then there is a
match.
Example 2
FTOS(conf)#route-map force permit 10
FTOS(config-route-map)#match tag 1000
FTOS(config-route-map)#match metric 2000
In the above route-map, only if a route has both the characteristics mentioned in the route-map, it is
matched. Explaining further, the route must have a tag value of 1000 and a metric value of 2000. Only then
is there a match.
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. As an example:
FTOS(conf)#route-map force permit 10
FTOS(config-route-map)#match tag 1000
FTOS(conf)#route-map force deny 20
FTOS(config-route-map)#match tag 1000
FTOS(conf)#route-map force deny 30
FTOS(config-route-map)#match tag 1000
In the above route-map, instance 10 permits the route having a tag value of 1000 and instances 20 & 30
denies the route having a tag value of 1000. In the above scenario, FTOS scans all the instances of the
route-map for any permit statement. If there is a match anywhere, the route is permitted, though other
instances of the route-map denies it.
To configure match criterion for a route map, use any or all of the following commands in the
ROUTE-MAP mode:
Command Syntax Command Mode Purpose
match as-path as-path-name CONFIG-ROUTE-MAP Match routes with the same AS-PATH numbers.