MAC Masquerading for VIPs on VLANs on the same Layer2 Network

Thanks for verifying that MAC Masquerading is the correct thing to do if you have a lot of virtuals running, however are you sure, that there is no negative impact if both VLANs are untagged on the same switch? AFAIK switches usually associate a VLAN ID with a MAC. In this Case Masquerading would work like a charm since the switch delivers the frames to the correct physical port.

However if both F5 "VLANs" are untagged and the switch is seeing the identical MAC on two different ports with no VLAN to differentiate, I believe that this will disrupt any communication.