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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

9.3(3)

Description (partial)

Symptom:
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.

Conditions:
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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