----- Original Message ----- From: "Ben Greear" <greearb@xxxxxxxxxxxxxxx> > Or, it could be a checksum support issue or similar. > > You probably should cross-post this with the bridging and/or xen mailing > lists...or just send to netdev@xxxxxxxxxxxxxxx > (I think this is probably more a Xen/Bridging problem than VLANs, though > it's possible there is a nasty interaction between all three.) I have found that by disabling TX CHECKSUM OFFLOAD on the veth0/eth0 (domain0/domainU) xen interface the symptom goes away. There is still an issue with the checksum offload support, but I think have a feasible workaround for now (I still want to do a bit more testing). Thank you to everyone that provided assistance. Greg :-)