Currently all of our remote sites are connected at Layer 3. VLANs from the central location don't propagate to the remote locations. Recently however I have heard that it may be advantageous for us to extend the VLANs at the central location to the remote sites. Some of the advantages would be that we could configure equipment at the central location and not have to readdress it to be used at the remote site. We would also be able to place a machine in the same remote site VLAN and be able to troubleshoot issues they may be experiencing at the remote site. How do we accomplish this?

I would like to keep the Layer 3 routing and add this feature. We have 6509s at the central site and 2811s at the remote sites. We are currently running OSPF for routing.