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

Last Modified

Mar 17, 2016

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

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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Bug Details Include

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