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Cisco Bug: CSCum04595 - NLB packets flooded on one N7K in a VPC set-up

Last Modified

Feb 05, 2017

Products (5)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases


Description (partial)

In a VPC set-up if NLB packet comes in through N7K1 and then to N7K2 on the peer-link,  the packet is flooded on N7K2 (and vice versa).
MS NLB running in IGMP mode.

Currently seen on 6.1(4). MS NLB running in IGMP mode (not sure if it is a must, though).
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