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Cisco Bug: CSCvs90075 - Cisco Nexus 9000/VXLAN - Forwarding broken due to inner Dot1Q copied during VXLAN encap

Last Modified

Oct 06, 2020

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

Inner dot1q tag retained for regular trunk ports breaking connectivity as destination port receives two dot1q tags.
Hosts across different leaf switches in VXLAN EVPN fabric.

system dot1q-tunnel transit 
VXLAN Fabric with Cisco cloud scale ASIC switches
currently observed with release 9.3(3)

Related Community Discussions

N9K-C9396PX and N3K-C3164Q Strange VXLAN behavior
Hi We recently built a new VXLAN topology in our datacenter which is pretty much like a Leaf-and-Spine. Strange issues happen during our laboratory testing and that's why I decided to explain what we did. Hope somebody here may have some clue as for what might be wrong in our case. A total of 8 N9K-C9396PX are used as leafs and customer access. They are all connected to 2 N3K-C3164Q, say, spine 1 and spine 2. So I have a VLAN from spine 1 to all leafs [1-8] and another VLAN from spine 2 to the same ...
Latest activity: Mar 13, 2020
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