[j-nsp] Logical tunnels on MPC2 and MICs

[Clarke Morledge]

I am a little confused about logical tunnel-services configuration on the 
MPC2, for both the chassis platform and MX-80.   Do you really need a MIC 
installed in the MPC if you want to configure a logical-tunnel (lt)?

Part of me says you do not simply because the tunnel is happening on the 
PFE.  Since the PFE is sitting on the MPC2 itself, the MIC would not be 
necessary.

But then the other part of me knows that with the older non-Trio that the 
PFE is integrated with the physical interfaces, so perhaps a MIC in the 
Trio world is required..... which I do not understand, since I do not get 
why the PFE needs a physical interface in order to get a tunnel to work.

If someone could straighten me out, that would be great.  Thanks.

Clarke Morledge
College of William and Mary
Information Technology - Network Engineering
Jones Hall (Room 18)
Williamsburg VA 23187