I haven't seen an example of 802.1q tunneling from the customer perspective. Our service provider gives us a Gig ethernet link at each site. This is a tagged vlan (vlan 2000). Our Switches are Cisco 6504 with a sup32 standard IOS. The SP fiber connects directly to a SFP on our Sup32. Our service provider equipment (non-cisco) doesn't support QinQ or tunneling, but we would like to extend a couple of vlans between sites. I know I can enable 802.1q tunnel on our interface facing the SP, but since these 6504's are also access layer devices, I'm unsure of how to attach our internal vlans to that tunnel. Can this be done without adding a sperate device in front of our 6500? I've already verified that our SP can increase the MTU to 1504. Attached is a simple diagram, Building A & B are the 6504.
Thank you for your input.