Troubleshooting guide

Troubleshooting BGP
8-123
6. To view route entries in the route table (also known as the forwarding table), use
the show ip route command in Privileged EXEC mode, as shown in the
following example:
RDN#show ip route
7. If you suspect that the local BGP router is not receiving some routes, use the
show running-config command in Privileged EXEC mode, as shown in the
following example:
RDN#show running-config
8. View the BGP portion of the show running-config command output to determine
if any route-maps, access-lists, distribute-lists, AS-path-access-lists, and/or
community-access-lists are applied. If they are applied, confirm that they are
configured correctly.
9. Verify that a suspect remote BGP peer router is sending the route-maps,
access-lists, distribute-lists, AS-path-access-lists, and/or community-access-lists
to the local BGP router.
10. If there are routes in the local BGP router table that do not display in a peer router
BGP table, use the show ip bgp command in Privileged EXEC mode, as shown
in the following example to view the list of BGP peers to which the local router
sends routes.
RDN#show ip bgp <prefix> [<mask>]
11. If the suspect peer BGP router is absent from the list, verify the route-map,
access-list, distribute-list, AS-path-access-list, and community-access-list
parameters that belong to the suspect peer BGP router to ensure that it is
configured correctly.