Large number of "SD-WAN Control" flow (0.0.0.0 as src/dst, dest FQDN velocloud.net and >0 bytes/packet value Total Bytes ) observed in Flow monitor

Products

• VMware VeloCloud SD-WAN

Issue/Introduction

It is possible that you can see there are flows which have 0.0.0.0 as src/dst, dest FQDN velocloud.net and >0 bytes/packet value Total Bytes on flow monitor.

Environment

"Virtual Edge" with Networking Accelerated

Resolution

This is the following specifications:

- When a large number of flows (depending on the installed memory of the virtual Edge, if 32GB memory, 300K flow is threshold) are generated, a large number of statistics will be recorded as communications to the SD-WAN Control.
- When the flows that have been grouped as SD-WAN Control communications in the past are still being communicated, in some cases, communication to the SD-WAN control is recorded.

Note that the statistics are only summarized and the actual traffic is flowing correctly. There are no traffic impact declarations from customers.