Filtering additional-paths advertised at route-map level

1. From privileged EXEC mode, enter global configuration mode.
   

   device# configure terminal
   

2. Create a route map instance and enter configuration mode for the route map instance.
   

   device(config)# route-map rm-1 permit 123
   

   This example creates instance 123 of a route map named rm-1 and enters configuration mode for the instance.
3. Configure filtering of additional-paths advertised for the route-map instance.
   

   device(config-route-map/permit/123)# match additional-paths advertise-set best-range 2 13
   

   This example configures the route-map instance to advertise paths with a path marking (tag) in the range from 2 through 13.

   

   Note

   Only one match additional-paths advertise-set configuration is allowed for a route map instance; any subsequent additional-paths advertise-set configuration overwrites the previous configuration.

   

   Note

   You cannot use a route map that is configured with an additional-paths match statement for incoming routes (routes that are configured by using the neighbor route-map command specifying the in option.

The following example first shows how to configure all paths to be eligible for selection as additional-paths, under the IPv4 address family. It then configures a route map (rm-1) to advertise paths marked in the range from 2 through 14.

device# configure terminal
device(config)# router bgp
device(config-bgp)# address-family ipv4 unicast
device(config-bgp-ipv4u)# additional-paths select all
device(config-bgp-ipv4u)# end

device(config)# route-map rm-1 permit 123 
device(config-route-map/permit/123)# match additional-paths advertise-set best-range 2 13