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Cisco Bug: CSCur22743 - CB40-brk: FP-reg: Duplicate mcast traffic seen after vdc suspend

Last Modified

Feb 03, 2017

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

6.2(10)S100

Description (partial)

Symptom:
Duplicate traffic for VDC suspend trigger on routers in a LAN. This issue can be hit if a one of the switch has L3 multicast route oifs/oils with multiple owners and when the oif/oil is going away on non-DR.

Ex:

(1.0.99.11/32, 235.0.0.3/32), uptime: 01:01:23, pim mrib ip igmp
  Incoming interface: Null, RPF nbr: 0.0.0.0
  Outgoing interface list: (count: 1)
    Vlan101, uptime: 00:03:13, pim, mrib

Conditions:
This can happen on a stand alone IHR or LAN LHR switches which have PIM and IGMP ownership for the same route oif/oil and there is a delete happening for the oif.
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