xenserver also has vif drivers for quantum: virt/xenapi/vif.py
I haven't looked at this bug in detail, but my guess is that the problem is caused by some vif-drivers assuming they know IP layer information about a VM, which obviously doesn't exist if there is no subnet. If that's the case, I don't think this issue would apply to the xenserver drivers, based on a quick inspection.
xenserver also has vif drivers for quantum: virt/xenapi/vif.py
I haven't looked at this bug in detail, but my guess is that the problem is caused by some vif-drivers assuming they know IP layer information about a VM, which obviously doesn't exist if there is no subnet. If that's the case, I don't think this issue would apply to the xenserver drivers, based on a quick inspection.