where third label of stack comes to scenario?

Hi,

I have difficulty understanding where third label of MLPS is used?

in traffic eng ,traffic goes through tunnel and forwarded base on LSP
created by RSVP (first label) and if vpn scenario is involved ,then we
second label of vpn will comes to play.

I saw in some books that MTU should be set to 1512 in case of MPLS/VPN/TE
scenario. But i couldn't see any third label imposed.

This is my understanding.

Please correct me If I'm wrong

Jeremy

Blogs and organic groups at http://www.ccie.net
Received on Wed May 20 2009 - 09:18:11 ART