Cisco Bug: CSCvs50407 - Multicast traffic drop on Nexus 9K-C95xx on ISSU upgrade of a vPC pair from 7.0.(3)I7.x to 9.3(3)
Jan 17, 2020
- Cisco Nexus 9000 Series Switches
Known Affected Releases
Symptom: Multicast traffic drop is seen during non disruptive ISSU of a vPC pair with N9K-C95xx series switches on multicast routes having no vPC Vlan outgoing interfaces. Conditions: When all of the following conditions are met: * ND-ISSU from 7.0(3)I7.x to 9.3.(3) on a Nexus 9k-C95xx series switch which is a part of vPC pair. * The vPC node where the ND-ISSU is performed is the non-forwarder for the multicast source and there are no vPC Vlan out going interfaces for the corresponding multicast route.
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