We had an enquiry this week from somebody who had found us on the Cisco website (Thanks Cisco!) who needed a layer2 VPN setting up. As the story unfolded, he wanted a layer2 VPN to run over a couple of broadband lines. This type of VPN solves a lot of problems in certain situations, in his case, there are 2 devices which have only MAC addresses and need to communicate over ethernet. Other uses include, extending the company LAN back to remote sites or home offices – meaning the remote users can use telephone systems, DHCP servers and the like over the link. Normally we would have delivered it over our MPLS network but as we are not the connectivity provider here we had to come up with a new solution. We used a technique using the open standard L2TPv3 (Layer 2 Tunneling Protocol v 3) which supports Layer 2 VPN and pseudo wires and ended up with a fully configured Lab setup deployed on 2 Cisco routers and 2 Gconnect broadband lines.