Cisco Bug: CSCvt18717 - UP sends back IPv6 multicast packets received and it results in multicast flood
Jun 17, 2020
- Cisco ASR 5000 Series
- Cisco ASR 5500
Known Affected Releases
21.16.4 21.16.c10 21.16.c8.74457 21.19.0 21.19.n1
Symptom: IPv6 multicast flood / loop between UP and L2 switch. Npusim instacens show high cpu utilization because of the flood. Conditions: - There is an intermediate switch that floods multicast packets. - UP has a IPv6 default route on the context.
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Bug Details Include
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