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Cisco Bug: CSCvv69145 - IGMP-memebership-report from receiver looped back over EVPN-AA to the receiver

Last Modified

Oct 01, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.0.2.BASE 7.1.2.BASE

Description (partial)

Symptom:
IGMP-memebership-report (IGMP-join) packets from receivers are looped back to receivers AC-PE1 —EVPN— PE2-AC.

Conditions:
Two ASR9k in EVPN-AA setup with anycast IRB are connecting L2 mcast receivers. With IGMP-snooping-profile the two EVPN-AA PE routers are synchronizing IGMP, while only the DF sends the multicast stream downstream to hosts. The issue is triggered when receiver is switching TV channels, the receiver is using (*,G) IGMPv2 that is mapped to (S,G) on the PE router.
Issue is triggered between after 10-30 TV-channel changes, so the forwarding is programmed for looping only in transient period.
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