Refer to the exhibit.
What is a reason for the RIB-failure?
A.
CEF is not enabled on this router.
B.
The route 10.100.1.1/32 is in the routing table, but not as a BGP route.
C.
The routing table has yet to be updated with the BGP route.
D.
The BGP route is filtered inbound and hence is not installed in the routing table.
http://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5816-bgpfaq-5816.html#twenty-three
What does r RIB-Failure mean in the show ip bgp command output?
R1> show ip bgp
BGP table version is 5, local router ID is 200.200.200.1
Status codes: s suppressed, d damped, h history, * valid, > best, i – internal,
r RIB-failure
Origin codes: i – IGP, e – EGP, ? – incomplete
Network Next Hop Metric LocPrf Weight Path
r> 6.6.6.0/24 10.10.13.3 0 130 0 30 i
*> 7.7.7.0/24 10.10.13.3 0 125 0 30 i
A. When BGP tries to install the bestpath prefix into Routing Information Base (RIB) (for example, the IP Routing table), RIB might reject the BGP route due to any of these reasons:
Route with better administrative distance already present in IGP. For example, if a static route already exists in IP Routing table.
Memory failure.
The number of routes in VPN routing/forwarding (VRF) exceeds the route-limit configured under the VRF instance.
In such cases, the prefixes that are rejected for these reasons are identified by r RIB Failure in the show ip bgp command output and are not advertised to the peers. This feature was first made available in Cisco IOS Software Release 12.2(08.05)T.
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If you know what is Rib-failure, it is easy to answer
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