I am connecting a multilink site to a client. I am using qinq stacking and assigning them a vlan based off that stack. The problem come when adding another service such as Internet connectivity. I was going to assign an ip to the vlan i am using as the extra tag, but that presents a problem with possible security. If they have untagged trafic going through my stack, it will get the default vlan and present a problem. The only thing I can think of doing is having two vlans for both services:
1) to connect their sites
2) for their Internet traffic that is shared through one of their sites.
Anyone have any thoughts on if this is the way it should be done or have another opinion? Thank you!