High retransmisions between VMs but no retransmision between pve node

Hello everyone,

We have been doing some network testing on our VMs because of a recent network change we have made. While doing this test we have noticed a high retransmission rate on our VMs, between nodes. This doesn't happen when VM's are on the same node, or when we test between 2 pve nodes. These are the test we did with iperf3

Testing iperf3 between 2 VM on different pve nodes

Testing iperf3 between 2 VM on same pve node

Testing iperf3 between 2 pve nodes...

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