Native VLAN in Q-in-Q tunnel

[n_khanolkar]

I have a query regarding the tunneling of customer Native VLANs across a service provider L2 using the Q-in-Q tunneling. Does the double-tagging in this case, take place at the service provider edge switch port? How does the mechanism work?

[Georg Pauwen]

Hello,

as I understand it, the double-tagging indeed takes place at the service provider edge switch. Depending on wether the native VLAN is tagged (the Cisco command would be ´vlan dot1q tag native) at the edge switch, it is either transmitted or dropped there.

Regards,

GP