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Cisco Bug: CSCvt21897 - SDWAN/vEdge: vEdge PIM traffic loss and eventually PIM crash

Last Modified

Aug 17, 2020

Products (1)

  • Cisco vEdge Router

Known Affected Releases


Description (partial)

Sending traffic between different Edge devices over SDWAN notices 50% traffic drop.

CSR (Multicast Source) behind vEdge to cEdge (Multicast Receiver) multicast interoperability, sees over 50% traffic drop.
If the traffic is sent from cEdge (Source) to cEdge (Receiver), no drops are seen.

The scenario is vEdge to cEdge interoperability:
Source - CSR (vm2) behind vEdge (vm1)
Receiver -  cEdge (vm11)
RP - cEdge (vm5)
Replicator - cEdge (vm4)
Traffic type - Sending UDP Multicast traffic of 100 joins from Source (vm2) to Receiver (vm11) sees 50% traffic drop

Problem Frequency: Everytime.
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