BGP Route Map Next Hop Self The BGP Route Map Next Hop Self feature provides a way to override the settings for bgp next-hop unchanged and bgp next-hop unchanged allpath selectively. These settings are global for an address family. For some routes this may not be appropriate. For example, static routes may need to be redistributed with a next hop of self, but connected routes and routes learned via Interior Border Gateway Protocol (IBGP) or Exterior Border Gateway Protocol (EBGP) may continue to be redistributed with an unchanged next hop.
The BGP route map next hop self functionality modifies the existing route map infrastructure to configure a new ip next-hop self setting, which overrides the bgp next-hop unchanged and bgp next-hop unchanged allpaths settings. The ip next-hop self setting is applicable only to VPNv4 and VPNv6 address families. Routes distributed by protocols other than BGP are not affected. You configure a new bgp route-map priority setting to inform BGP that the route map will take priority over the settings for bgp next-hop unchanged and bgp next-hop unchanged allpath. The bgp route-map priority setting only impacts BGP.
The bgp route-map priority setting has no impact unless you configure the bgp next-hop unchanged or bgp next-hop unchanged allpaths settings. How to Configure BGP The following sections provide configurational information about BGP. Default BGP Configuration The table given below shows the basic default BGP configuration. Table 2: Default BGP Configuration Default Setting Feature Disabled: None defined. Aggregate address None defined. AS path access list Disabled. Auto summary Best path • The router considers as-path in choosing a route and does not compare s from external BGP peers. • Compare router ID: Disabled. BGP community list • Number: None defined.
When you permit a value for the community num defaults to an implicit deny for everything else that has not been permitte • Format: Cisco default format (32-bit number). BGP confederation identifier/peers • Identifier: None configured. • Peers: None identified. Configuring BGP BGP Route Map Next Hop Self Configuring BGP 13