Display locally originated BGP routes

Displaying the BGP routes originated in the local AS is simple: you just filter the BGP table with a regular expression matching an empty AS path. Displaying routes originated by the local router is tougher. You could use the fact that the local routes have the weight set to 32768:

PE-A#show ip bgp quote-regexp "^$" | inc Network|32768
   Network          Next Hop            Metric LocPrf Weight Path
*> 10.0.1.1/32      0.0.0.0                  0         32768 i

This would work if you don’t play with BGP weights in network statements. If you’ve changed the weights, you should filter the routes based on the BGP next-hop: locally originated routes have the next-hop 0.0.0.0 and all other routes should have a non-zero BGP next-hop. To filter BGP routes based on the next-hop you have to:

• Define an access-list that matches desired next-hop (0.0.0.0)
• Define a route-map that uses the access-list to match IP next hop.
• Display BGP routes matched by a route-map.

A sample configuration and show command printout is included below:

ip access-list standard AllZeros
 permit 0.0.0.0
!
route-map NextHopSelf permit 10
 match ip next-hop AllZeros

PE-A#show ip bgp route-map NextHopSelf | begin Network
   Network          Next Hop            Metric LocPrf Weight Path
*> 10.0.1.1/32      0.0.0.0                  0         32768 i

To make this command simpler to use, define an alias: alias exec mybgp show ip bgp route-map NextHopSelf | begin Network.