Overlay transport Virtualisation

Unanswered Question
Jul 21st, 2009
User Badges:


I was asked by my client to have L2 network spread over L3. I am aware of the VPLS stuff. It will be great help if somebody can guide me to the subject line technology documentation for cisco products.

The bried decription about OTV:

A method and system described herein support Layer 2 (L2) and Layer 3 (L3) virtual private networks (VPNs) over a L2 or Layer 3 (L3) infrastructure. The method and system are referred to herein as Overlay Transport Virtualization (OTV) since they provide an "overlay" method of doing virtualization versus traditional "in-the-network" type systems, in which multiple routing and forwarding tables are maintained in every device between a source and a destination.

Thnks in advance,


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Laurent Aubert Fri, 07/24/2009 - 07:01
User Badges:
  • Cisco Employee,


VPLS allows you to extend broadcast domain over a L3 network. It's based on MPLS technology.

If you want only pt-2-pt connection, you can use AToM:


If your backbone is not MPLS aware, you can use L2TPv3 instead for pt-2-pt connection:





This Discussion