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Cisco Bug: CSCvs71221 - Nexus switch routing packets on the peer-link with a rogue/incorrect destination mac address.

Last Modified

Aug 12, 2020

Products (1)

  • Cisco Nexus 6000 Series Switches

Known Affected Releases


Description (partial)

Nexus switch changes the destination mac-address to an unknown mac address.
Nexus peer switch drops the packet as it doesn't recognise the destination mac address.

The 2 nexus switches should be in a vPC setup.
The host is connected to only one nexus device.
The concerned SVIs on both switches are in the same VRF but not in default/management.
The Source host and the destination switch SVI are in the same VLAN and subnet.
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Bug Details Include

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