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Cisco Bug: CSCul00757 - IGMP: All Devices are querier in subnet

Last Modified

Feb 15, 2018

Products (4)

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

Known Affected Releases


Description (partial)

Each N7K in a subnet will show itself as IGMP active querier even though only the lowest IP address in the subnet is supposed to perform this role.   High CPU may or may not be seen.  A large number of IGMP Queries sent and/or received by N7K in one or more Vlans.

This was observed on four N7Ks (two vPC pairs) connected to one another via L2.  These were running 5.2(9).
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