Hi Guys, I got it working now! The new IOS now supports "switchport mode dot1q-tunnel" therefore we can have a port that is completely transparent.This is running over a IPVPN over MPLS network.  pseudowire-class TestP2P encapsulation l2tpv3 protocol...

Thank you for your informative information, I think you've got what I am looking for! l2protocol-tunnel is used in high grade models however never in the 880 series router until the IOS 15.2. I shall give this a try and revert! Thanks again.

Hi Claus, I have the exact same setup here with two Cisco 881-Sec-K9s with IOS 151-4.M4. I have done the following on both routers to have a transparent L2 conenctivity between the two sites and I can get ping working however not the multicast traffi...