Hi guys, I am hoping somebody might have come across this problem before. We have a customer Mikrotik CCR which runs just over 1000 vlans, pretty much all are QinQ, so we have a couple of parent VLANS with the rest hanging off those, some parents have a couple of hundred vlans hanging off them each. Everything is working fine except one strange thing. On one of the inner VLAN's when it's created it doesn't inherit the MAC address of its parent physical interface, the MAC just stays blank. I have recreated the VLAN from scratch, tried changing the VLAN ID, the name of the VLAN interface, etc but nothing I do gets a MAC address in there unless I assign it to a different physical interface. The particular VLAN which is the outer tag has about 220 VLANS hanging off it, all of which are working fine except this one. Has anybody come across this at all ? The router is running V6.10, I would update but there is a change freeze on so not really possible at the moment.... Thanks Paul