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Cisco Bug: CSCvt25753 - Nexus 3500 IGMPv3 leave from single host causes OIL flush until next query

Last Modified

Aug 24, 2020

Products (55)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 3064 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 93108TC-FX Switch
  • Cisco Nexus 3548-XL Switch
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Known Affected Releases

6.0(2)A8(11b) 7.0(3)I7(6) 7.0(3)I7(7) 9.2(1)

Description (partial)

When Nexus 3500 has downstream host using IGMPv3 and the host sends a leave for the multicast group the mroute OIL gets flushed and other hosts lose the multicast stream even though their interface is still populated in the IGMP snooping table.

Nexus 3500 as LHR utilizing IGMPv3 and one host sends a IGMPv3 leave. Issue when the leaving host sends more than one consecutive leave. (e.g. Spirent sending multiple leaves with 10secs) causes the 2nd host to experience traffic drop.
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