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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)

Symptom:
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.

Conditions:
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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Bug Details Include

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