Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

Filtering BGP Routes Using Route Maps

To filter routes using a route map, use these commands.

1. Create a route map and assign it a name.
   CONFIGURATION mode
   route-map map-name [permit | deny] [sequence-number]
2. Create multiple route map filters with a match or set action.
   CONFIG-ROUTE-MAP mode
   {match | set}
   For information about configuring route maps, see Access Control Lists (ACLs).
3. Return to CONFIGURATION mode.
   CONFIG-ROUTE-MAP mode
   exit
4. Enter ROUTER BGP mode.
   CONFIGURATION mode
   router bgp as-number
5. Filter routes based on the criteria in the configured route map.
   CONFIG-ROUTER-BGP mode
   neighbor {ip-address | ipv6-address | peer-group-name} route-map map-name {in | out}
   Configure the following parameters:

   • ip-address or ipv6-address or peer-group-name: enter the neighbor’s IPv4 or IPv6 address or the peer group’s name.
   • map-name: enter the name of a configured route map.
   • in: apply the route map to inbound routes.
   • out: apply the route map to outbound routes.

DellEMC# configure terminal
DellEMC(conf)# route-map route1 permit
DellEMC(conf-route-map)# set as-path prepend 400
DellEMC(conf-route-map)#exit
DellEMC(conf)# router bgp 400
DellEMC(conf-router_bgp)# neighbor 10.10.10.1 route-map route1 out
DellEMC(conf-router_bgp)#