VJ is only supported for PPPoS, RFCs does not say VJ is forbidden on PPPoE or PPPoL2TP (looks like it is strongly discouraged though, due to checksum issues when using VJ).
VJ is only supported for PPPoS, RFCs does not say VJ is forbidden on PPPoE or PPPoL2TP (looks like it is strongly discouraged though, due to checksum issues when using VJ).