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Cisco Bug: CSCul01678 - N3K: IGMP membership reports sent to incorrect CoPP class

Last Modified

Jun 08, 2017

Products (6)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 3016 Switch
  • Cisco Nexus 3064-T Switch
  • Cisco Nexus 3048 Switch
  • Cisco Nexus 3132Q Switch

Known Affected Releases

6.0(2)U2(1)

Description (partial)

Symptom:
On a Nexus 3000 switch IGMP membership reports might be processed by Control Plane Policing in the incorrect class.  This can cause IGMP snooping entries to time out if that class is dropping packets.

Conditions:
For this to happen you need to have both the the RPF on the (*,G) and the outgoing interface be the same interface.  It will look like this:

(10.10.10.1/32, 233.90.130.1/32), uptime: 1d19h, mrib pim ip
  Incoming interface: Vlan71, RPF nbr: 10.10.10.3
  Outgoing interface list: (count: 1)
    Vlan71, uptime: 1d12h, mrib, (RPF)
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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