Symptom/Cause | Solution |
|---|---|
"l3vnid <value>" is not successful | Ensure that the VXLAN IRB is enabled. (config)# nvo vxlan irb |
"evpn <irb_interface>" is not successful | • Ensure that the IRB interface which you are trying to map is configured. Use the below command to configure. (config)# interface irb 1 (config-if)# ip vrf vrf1 • Ensure that ip vrf forwarding <vrf-name> (VRF should have L3VNID) is configured in the IRB interface which you are trying to map to the L2VNID. Use the below command to configure. (config)# ip vrf vrf1 (config-vrf)# l3vni 12001 |
IRB interface is DOWN | • Ensure that IRB interface is not administratively shut down. • Ensure that IRB interface is mapped to the L2 VNID. Use the show command to verify the IRB - L2 VNI mapping "show nvo vxlan l3vni-mp" If not use the below command to configure. (config)#nvo vxlan id 10 ingress-replication inner-vid-disabled (config-nvo)#evpn irb1 |
L3 Tunnel installation is unsuccessful. | Ensure that Prefix routes are installed in the VRF (VRF should have L3 VNID) Routing Table. #show ip route vrf <vrf_name> #show arp vrf <vrf_name> #show nvo vxlan |
Missing routes in the VRF routing table. Both connected and static. | • Ensure that IRB interfaces are UP and running. • Ensure that L3 Tunnel is UP and Running. • Ensure that "redistribute connected" is configured in the VRF address family to advertise the connected route. • Ensure that "redistribute static" is configured in the VRF address family to advertise the static route. • Ensure that if route is inactive in VRF routing database, then check that ARP resolution is successful for the next-hop for those routes. |
Symmetric Config: L3 traffic not flowing from one VNID to another VNID | • Ensure that all the interfaces are up and running including the IRB interfaces. • Ensure that ARP of that Host is resolved and added in "show arp vrf <vrf-table>" for both Local and Remote Host. • Ensure that destination routes are installed on the source VTEP using "show ip bgp vrf all" and "show ip route vrf all". |
Asymmetric Config: L3 traffic not flowing from one VNID to another VNID | • Ensure that all the interfaces are up and running including the IRB interfaces. • Ensure that ARP of that Host is resolved and added in "show arp vrf <vrf-table>" for both Local and Remote Host. |