What does the RIB-Failure status code signify in the BGP table?

The RIB-Failure status code indicates that BGP has learned about a network and has processed its advertisement, but it did not install the route into the Routing Information Base (RIB) for various reasons. This typically happens when there's a conflict or issue that prevents the route from being deemed valid for inclusion in the RIB. Common reasons could include a more specific route already existing in the RIB, administrative distances causing preference for another route, or unmet next-hop reachability requirements.

This status serves as an essential diagnostic tool for network engineers, as it highlights issues in route selection and installation, prompting further investigation into why the route is not being installed. Understanding RIB-Failure helps ensure that network configurations are correct and optimal, ultimately improving the routing process within a BGP-managed environment.