AFAIK, it is not able to carry 802.1q in WAN connection, even bridging. You may require to create sub-intefaces in WAN then map to the correspong VLANs. VLAN trunking can be enabled at LAN only. The problem is : can you bridge a trunk ? I believe not.
I'm not really sure this is what you are looking for, but try this link:
IEEE 802.1Q-in-Q VLAN Tag Termination
"Encapsulating IEEE 802.1Q VLAN tags within 802.1Q enables service providers to use a single VLAN to support customers who have multiple VLANs. The IEEE 802.1Q-in-Q VLAN Tag Termination feature on the subinterface level preserves VLAN IDs and keeps traffic in different customer VLANs segregated. "
We are pleased to announce availability of Beta software for 16.6.3.
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towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
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