dmzlink-bw exit-peer-policy filter-list inherit peer-policy maximum-prefix next-hop-self next-hop-unchanged prefix-list remove-private-as route-map route-reflector-client send-community send-label soft-reconfiguration unsuppress-map weight Peer policy templates are used to configure BGP policy commands that are configured for neighbors that belong to specific address families. Like peer session templates, peer policy templates are configured once and then applied to many neighbors through the direct application of a peer policy template or through inheritance from peer policy templates.
The configuration of peer policy templates simplifies the configuration of BGP policy commands that are applied to all neighbors within an autonomous system. Like a peer session template, a peer policy template supports inheritance. However, there are minor differences. A directly applied peer policy template can directly or indirectly inherit configurations from up to seven peer policy templates. So, a total of eight peer policy templates can be applied to a neighbor or neighbor group. Like route maps, inherited peer policy templates are configured with sequence numbers.
Also like a route map, an inherited peer policy template is evaluated starting with the inherit peer-policy statement with the lowest sequence number and ending with the highest sequence number. However, there is a difference; a peer policy template will not collapse like a route map. Every sequence is evaluated, and if a BGP policy command is reapplied with a different value, it will overwrite any previous value from a lower sequence number. The directly applied peer policy template and the inherit peer-policy statement with the highest sequence number will always have priority and be applied last.
Commands that are reapplied in subsequent peer templates will always overwrite the previous values. This behavior is designed to allow you to apply common policy configurations to large neighbor groups and specific policy configurations only to certain neighbors and neighbor groups without duplicating individual policy configuration commands. Peer policy templates support only policy configuration commands. BGP policy configuration commands that are configured only for specific address families are configured with peer policy templates. The configuration of peer policy templates simplifies and improves the flexibility of BGP configuration.
A specific policy can be configured once and referenced many times. Because a peer policy supports up to eight levels of inheritance, very specific and very complex BGP policies can also be created. Configuring BGP Peer Policy Templates Configuring BGP 12