trunk vlans over layer 3 mpls circuit

[Justin Westover]

Is there a way to trunk vlans over a layer 3 mpls VPN? I know this works fine with metro ethernet but is it at all possible to tunnel/trunk vlans through that layer 3 circuit?

Sent from Cisco Technical Support iPhone App

[andrew.prince]

You can "Bridge" in a GRE tunnel - however this is not officially supported, but routers can do it.

But I think Cisco recommends L2TPv3.

HTH>

[Justin Westover]

So this is obviously going to add overhead to the frame of the packet right? Sounds like you are suggesting creating a point to point tunnel within the layer 3 mpls circuit right?

[andrew.prince]

read the below link

http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/12_4t/wan_12_4t_book.html

[Justin Westover]

Alright I went through and read the part about l2tpv3, my only question is, does this have to be setup between my CE router and the PE router? Or can I set this up between my two routers, one at one site and the other at another site and the tunnel is just created through the MPLS circuit.

[andrew.prince]

In the document - read the section titled "How to Configure L2TPv3"

or go here

http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/wan_l2_tun_pro_v3_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1057640

Or go to the section titled "Configuration Examples for L2TPv3"

or go here

http://www.cisco.com/en/US/docs/ios/wan/configuration/guide/wan_l2_tun_pro_v3_ps6441_TSD_Products_Configuration_Guide_Chapter.html#wp1311387