EtherChannel over 802.1Q Tunneling

Hello Frederic

It seems that when you configure Etherchannel on the link between the service provider equipment and the customer equipment, you can only configure each link to carry a single VLAN. This means that you will require the same number of physical links as VLANs that you want to share across the QinQ tunnel. Etherchannel will not provide redundancy for other VLANs if a physical link fails in this scenario. This is further supported by this Cisco documentation that describes how to configure this:

So the behaviour you see where one of the VLANs fails when the link corresponding to that VLAN is disconnected is expected.

I hope this has been helpful!

Laz