RE: where third label of stack comes to scenario?

You have 3 labels in specific scenarios where your TE Tunnel does not end in a PE router and you need to enable MPLS in the TE
Tunnel itself.

This document is a must:

http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a0080125b01.shtml

Regards,

Antonio Soares, CCIE #18473 (R&S)
amsoares_at_netcabo.pt

-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of jeremy co
Sent: quarta-feira, 20 de Maio de 2009 0:18
To: Cisco certification
Subject: 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 - 01:32:00 ART