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OPERATIONAL DEFECT DATABASE
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Discrepancy between RIB "show ip route" and FIB "show forwarding route" Leaf-2# sho consistency-checker forwarding vrf TEST IPV4 Consistency check :table_id(0x16) Execution time : 4 ms () No inconsistent adjacencies. Inconsistent routes: 1. slot(1), vrf(TEST), prefix(0.0.0.0/0), Route inconsistent in FIB Software. Consistency-Checker: FAIL for ALL
- Running release 10.x - If you perform a failover or modify the advertised route port on any given device X in the direction of Nexus 9K, and keep the next hop of the advertised prefix IP unchanged but alter its path, the update will reflect in the Routing Information Base (RIB), but not in the Forwarding Information Base (FIB). - Nexthop updated from EVPN adj to SVI adj, the FIB will still point to the EVPN adj.
Clear the FIB entry for the affected prefix: clear forwarding route vrf TEST 0.0.0.0/0 module 1
1- Original status before failover/ Adj changes, RIB and FIB were pointing to EVPN Adj. Leaf-2# sh ip route 0.0.0.0 vrf TEST 0.0.0.0/0, ubest/mbest: 1/0 *via 10.16.13.1, [20/0], 00:05:42, bgp-650, external, tag 6505 Leaf-2# sh ip route 10.16.13.1 vrf TEST 10.16.13.1/32, ubest/mbest: 1/0 *via 10.9.3.4%default, [200/0], 00:05:39, bgp-650, internal, tag 650, segid: 5039 tunnelid: 0xa5a4 encap: VXLAN Leaf-2# sh forwarding route 0.0.0.0 vrf TEST ------------------+-----------------------------------------+----------------------+-----------------+----------------- Prefix | Next-hop | Interface | Labels | Partial Install ------------------+-----------------------------------------+----------------------+-----------------+----------------- 0.0.0.0/0 10.9.3.4 nve1 vni: 5039 2- After Failover showing broken status, only was RIB updated correctly to SVI adj Leaf-2# sh ip route 0.0.0.0 vrf TEST 0.0.0.0/0, ubest/mbest: 1/0 *via 10.16.13.1, [20/0], 00:10:39, bgp-650, external, tag 6505 Leaf-2# sh ip route 10.16.13.1 vrf TEST 10.16.13.1/32, ubest/mbest: 1/0, attached *via 10.16.13.1, Vlan531, [190/0], 00:01:35, hmm Leaf-2# sh forwarding route 0.0.0.0 vrf TEST ------------------+-----------------------------------------+----------------------+-----------------+----------------- Prefix | Next-hop | Interface | Labels | Partial Install ------------------+-----------------------------------------+----------------------+-----------------+----------------- 0.0.0.0/0 10.9.3.4 nve1 vni: 5039