[c-nsp] MPLS Confusion ;)

[Paul Stewart]

Thanks ;)  The only reason I would want to consider this is because if we
used a GSR here at a P router and then 7206VXR's as the PE devices we have
6500/Sup2's physically in the middle.  I figured that if I created a VLAN
trunk to carry the MPLS traffic from the GSR to the 7206VXR's then I could
keep the 6500's in the physical connection....

Paul


-----Original Message-----
From: Peter Rathlev [mailto:peter at rathlev.dk] 
Sent: Tuesday, February 12, 2008 11:32 AM
To: Paul Stewart
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MPLS Confusion ;)

On Tue, 2008-02-12 at 11:13 -0500, Paul Stewart wrote:
> With 6500's in the "middle" between the GSR and the 7200's, will layer2
> connectivity function as normal with MPLS?  To explain, if I want to use
the
> GSR as the P router and 7206VXR as PE but have layer2 trunks in between
> these devices (6500's) is there anything that won't function in MPLS?
Sorry
> if this seems like a basic question...

I'm not sure I understand the question completely, but if you're asking
if you can transport MPLS in a VLAN in a trunk, the answer is yes. MPLS
runs just fine, although you have to consider the overhead from the
802.1Q tags (4 bytes).

If it's a wise thing to do is another matter. Why would you want to?

Regards,
Peter