Live Migrate VMs that use one or more SDNs -> Workable?

[BloodyIron]

I know this is probably an open-ended question, but I'm trying to do upgrade and other planning for a client who has a lot of SDNs going on within their PVE Cluster.

There's a few servers in the same rack, connected to I think the same switch (switching equipment is not handled by me), and so far as I know the VLANs between these specific servers are reachable on all of them (the ones in the rack).

Now, I'm a bit green behind the ears for SDNs in PVE, and I wanted to know what kind of pitfalls/success exists for live migrating VMs between PVE Nodes when SDNs come into play. Whether a VM uses one, or more, SDNs, with or without QinQ.

Can anyone give me some insights here please? My GoogleFu didn't really come up with enough of a picture to have reliable confidence in my understanding, and I am not in a position to replicate their environment in mine to the extent theirs is.

Any help appreciated, thanks!

 

[sw-omit]

SDN's are deployed cluster-wide (unless in cluster -> SDN -> Zones, they are restricted to certain nodes), so as long as the switching-hardware is set up correctly, it should just work.
If you want to be extra sure though, set up a temporary VM (possibly even a live-vm) with an adaptor/IP in each of the networks (all without a gateway set up so it doesn't try to route your traffic between networks), and just ping the gateway and/or a VM on each network and then migrate between all the hosts. If you lose ping-reply, hardware or config is probably not set up correctly.