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Cisco Bug: CSCuq36827 - N5k/N6k - Routing unknown u/c and link local b/c packets

Last Modified

Nov 27, 2020

Products (1)

  • CiscoPro Workgroup EtherSwitch Software

Known Affected Releases


Description (partial)

Symptom:Nexus 5000 & 6000 series switches may route packets with an unicast IP destination address and a broadcast destination mac address. The same is also observed for Unknown Unicast flooded packets hitting the CPU and getting routed, i.e. source MAC being rewritten to the Router MAC of the switch which is routing the packet.

Switches running in L2 mode or without L3 license. SVI exists for the VLAN in which such an issue is observed.
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