Next-Hop Router Not Reachable
If you are seeing BGP routes in the BGP table, but they are not appearing in the routing table, the router might not be able to reach the next hop. For a BGP router to install a BGP route in the routing table, it must be able to reach the next-hop address listed for the network. Example 18-26 shows the output of show bgp ipv4 unicast on R5. Let’s focus on network 10.1.1.0/26. Notice how there is no > symbol after the *. The * > symbols indicate that it is a valid best path to reach that network and has been installed in the routing table. In this case, the path is valid but not the best, and as a result, not placed in the routing table.
Example 18-26 Identifying BGP Next-Hop Issues
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