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Cisco Bug: CSCun90491 - VLAN BD change causes Traffic outage on 'untouched' VLAN IGMPV3 S entry

Last Modified

Jan 31, 2017

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases


Description (partial)

Traffic loss will be observed on IGMPV3 (G,S) entries for untouched VLAN's on F3 modules.

1) IGMP snooping enabled and working in IGMPv3 mode (and)
2) Delete of VLAN (and)
3) Deleted VLAN's HW_BD should be same as the mac table HW BD field value of any other VLAN's S entry.

Under the above conditions traffic loss on IGMPV3 (G,S) entries will be seen. The traffic loss is not applicable when IGMPV2 (G,*) entries are used. This issue happens very rarely because of condition 3.
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