802.1Q trunk over a L2TPV3 Tunnel

Unanswered Question
Apr 23rd, 2008

Hi all,

I'm just curios about this scenario.

Can a switch-to-switch 801.1Q trunk be expand over an L2TPV3 connection or does it need a 802.1Q-in-Q before it goes through the tunnel?

Thanks folks,

Norbert

I have this problem too.
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bmahaffey Thu, 04/24/2008 - 08:35

Cisco says you can.

How I have it configured is a vlan per sub interface.

Ethernet over L2TPv3

http://www.cisco.com/en/US/netsol/ns588/netqa09186a008009d4ea.html

Q. What are the main applications of Ethernet over L2TPv3?

A.

* Ethernet Trunking: enables user to take all of the Ethernet on an associated interface and tunnel it across an IP core to a remote destination.

* Per-VLAN Tunneling: enables the tunneling of individual VLANs. This method offers the granularity of controlling which of the traffic is tunneled to a given destination.

* VLAN Trunking: similar to Ethernet trunking, all VLANs that are associated with an 802.1q-based interface are passed across the L2TPv3 Tunnel. This is useful in trunking applications between Ethernet Switches.

I know you seen this but if someone else sees this, here is the configuration guide.

http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120s/120s23/l2tpv3.htm

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