The MPLS WG Archive

["Gray, Eric" <egray@celoxnetworks.com>]

Mayank,

	The concept itself is _not_ wrong.

	For example, if management traffic is carried to a 
core ATM LSR, the LSP on which it arrives must terminate 
at the ATM LSR.  This is one reason for David's comment 
to the effect that the term 'edge' may be somewhat fuzzy.  

	Also, a core-ward ATM LSR (or any LSR) may be at a
place where the aggregate of IP destinations changes.  In
this case, an LSP carrying IP traffic to which this applies
would terminate at that LSR (ATM or otherwise) and the IP 
traffic may be injected into another LSP for forwarding
further toward the destination network.  If you map out a 
few likely topologies, you will likely find that this is 
going to be the case for a significant amount of IP traffic 
on many LSPs at nearly every LSR.  Core-ward ATM switches 
will only be an exception if they are not LSRs.  This is 
another reason why edges are fuzzy.

Eric W. Gray
Systems Architect
Celox Networks, Inc.
egray@celoxnetworks.com
508 305 7214


-----Original Message-----
From: Mayank Kumar [mailto:mkumar@aplion.stpn.soft.net] 
Sent: Tuesday, August 06, 2002 1:18 AM
To: Mpls (E-mail)
Subject: can lsp's be terminated within an atm core ????

hi
following my previous question?? i wanted to know that can lsp's be
originated and terminated within an atm backbone or is the concept itself
totally wrong.

thanks
and  regards
Mayank