end to end vlans

Unanswered Question
Apr 21st, 2009

Is it possible to have switches separated by a WAN share vlans? Can I have a host on a switch in Site A belong to vlan 10 and have a host on a remote site with a MPLS cloud in between the two switches on vlan 10 as well? How would the trunking and vtp adverstisements span layer 3?

thank you,

Bill

I have this problem too.
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lamav Tue, 04/21/2009 - 12:27

Hi:

That question is asked a lot on these forums. I wonder if doing a search would help you.

But to answer your question, one way of spanning a vlan across a L3 cloud is to tunnel through it, such as with L2TP or GRE tunnels. There are also L2 MPLS-based VPNs that you can look into.

Off the cuff, I would say GRE tunnels are the easiest to set up.

HTH

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