Cisco Bug: CSCsz34607 - unresolved route gets installed in URIB with recursive routes.
Jun 17, 2016
- Cisco Nexus 7000 Series Switches
Known Affected Releases
Symptom: A Nexus 7000 may accept and install a recursive IPv4 or IPv6 route in the RIB. The route will break forwarding for the prefix. Conditions: This can only occur when the network generates a looping route, and this route's next-hop is directly attached, e.g. 10.0.0.0/8, via 10.0.0.1, bgp 10.0.0.0/24, via Ethernet0, direct i.e. the 10.0.0.0/8 route is via 10.0.0.1, which is directly attached. The following would be a valid route: 10.0.0.0/8, via 10.0.0.1, bgp 10.0.0.0/24, via 172.16.0.1, Ethernet0, ospf i.e. here 10.0.0.1 resolves to 172.16.0.1 on Eth0.
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