OPERATIONAL DEFECT DATABASE
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With the global command "system dot1q-tunnel transit" present in a vxlan enabled N9K switch the switch will not remove the incoming dot1q tag (VXLAN Encap) but add another, dot1q tag to the frame (VXLAN Decap) on the egress port (trunk) towards the end systems. These frames then get subsequently dropped by the end systems which is causing loss of service on the end systems.
Switch needs to be in a vxlan fabric, global command 'system dotq-tunnel transit' has to be enabled. No operational port for QinVNI on the switch VPC VXLAN setup
Remove the global command 'system dot1q-tunnel transit' if it is not in use. Or toggle the command: # no system dot1q-tunnel transit # system dot1q-tunnel transit
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