Ok everyone here is a good brain teaser.

Current Situation:

I have a simple L2 vpn between 2 sites.


AR1-------FR Switch---------- FR Switch---------AR2


Desired Solution:

So now I want to terminate the PVC for AR1 on CR1 and and 
AR2 on CR2. Thus eliminating the Circuit between the frame-switches.
My issue is that I cant reconfigure AR1 or AR2. The only configuration
I can do is on the FR Switches and CR1 and CR2. Currently CR1 and CR2
Are MPLS enabled, but Im not sure that is the way to go with this.




AR1-------FR Switch             FR Switch---------AR2
                |                               |
                |                               |
                |                               |       
           Core Router 1----------Core Router 2
        




Now the only way I can think of doing this is enabling frame switching on
CR1 and CR2,
Thus turning them into a "Frame-Switch". We don't need to worry about
scalability
As only a handful of these will ever be preformed. Any other ideas, Tunnels,
etc.

Remember I can't change the IP or DLCI at the AR's they need to stay the
same.
As for routing protocols of AR1 and AR2, I have no idea, but any solution
that
Satisfies the requirements should be able to accommodate the routing
protocol of 
choice


Thanks


Erich




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