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Cisco Bug: CSCum32363 - Nexus 5K vPC+ peer tunnels ARP reply over peer-link back to source

Last Modified

Nov 27, 2020

Products (2)

  • CiscoPro Workgroup EtherSwitch Software
  • CiscoPro Workgroup EtherSwitch Software

Known Affected Releases

5.1(3)N2(1) 6.0(2)N2(1) 6.0(2)N2(2)

Description (partial)

Unicast ARP reply, in an unknown DMAC forwarding scenario, is tunneled back to vPC peer who originated the frame, via the peer-link, by vPC peer.
The peer-link is not in the topology that this frame is being forwarded on.

This is seen on a  5548UP running 5.1.3.N2.1, 6.0.2.N2.1, and 6.0.2.n2.2 with FabricPath in VPC+.
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