UDP late packets are dropped for replicate flow
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UDP late packets are dropped for replicate flow


Article ID: 367289


Updated On:


VMware VeloCloud SD-WAN VMWare SD-WAN VMware SD-WAN by VeloCloud


UDP voice application which includes both voice signaling and stream is configured under a single business policy with realtime service class.

Voice signaling messages which control call registration and call setup randomly got dropped.


VMware VeloCloud SD-WAN all edge software versions


Realtime service class is designed especially for voice/video stream applications.

For Realtime UDP traffic, packet replication will be implemented per DMPO mechanism to improve the service quality.

UDP late packets are dropped for replicate flow.

Voice signaling protocol is an interaction type protocol used for initiating, maintaining, and terminating communication sessions, it should be configured as transactional class.


  1. Configure service class in business policy for related application as transactional.
  2. TCP is not affected by this mechanism, try to use TCP instead of UDP.

Additional Information

Similar issue was also reported for Radius, it was configured wrongly as realtime service class.