on the source VM :
I tried to switch to another network and re put the good network to no avail
I tried to put the network mentionned in the error (UUID that is not the good one), to no avail
I deleted the VIF, recreated it with the good network for this VM
and booom, DR is okay ! that was not a XAPI problem
[image: 1766155878368-e8de568f-95df-4268-acfc-7dd8eabb93c9-image.png]
so, there was a problem with this VM VIF... and error message in XO6 permitted to pin point it
thanks for the advice @florent !