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Cisco Bug: CSCuq33924 - IGMPv3 Group specific query not flooded and sent back on mrouter port

Last Modified

Nov 27, 2020

Products (2)

  • CiscoPro Workgroup EtherSwitch Software
  • Cisco Nexus 3548 Switch

Known Affected Releases

6.0(2)A1(1a) 6.0(2)A1(1c) 6.0(2)U2(1) 6.0(2)U2(2)

Description (partial)

All hosts attached to a Nexus 3500/3000 experience a multicast outage when one receiver sends an IGMP leave.

The group specific membership query from the mrouter (generated as a result of IGMP leave) is not flooded to the ports in the vlan, and results in outage. Also, the Group specific query may be sent back on the mrouter port.

Nexus 3548 running any release earlier to 6.0(2)A4(1) and operating in Warp mode.

Nexus 3000 running any release earlier to 6.0(2)U3(1)

This issue is NOT seen in Nexus 3500 operating in Normal mode.
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