BGP RIB failure
A RIB "failure" as the name suggests, does not necessarily indicate a bad or undesirable configuration. It simply means that that particular BGP entry did not enter the routing table.
There are several reasons why you see a RIB failure:
- Missing next-hop reachability
- Route suppression due to policies
- Memory constraints
- Invalid next-hop address
- Route filtering
- Learned through another source: BGP RIB failure Administrative Distance