The MPLS WG Archive

[Jonathon Plonka <jplonka@gblx.net>]

On Sun, 27 May 2001 14:59:45 -0400, "Naidu, Venkata"
<Venkata.Naidu@Marconi.com> wrote:

>Shawn,
>
>  I would say, traffic engineering is not widely 
>  deployed at the core. But remember we are always
>  ahead of what industry chooses.  
>
We, global crossing,  have it deployed 100% and have had it in the core
since May of 1999 with a full US mess completed in June of 99.

>  The need for TE comes when ISPs has less bandwidth
>  and would like to manage bandwidth more efficiently
>  than their competitors.

Or when ISPs have a mix of circuits and need distribute traffic over them.

>
>  Most ISPs reporting 2.5 - 15% utilization of their 
>  backbone, it is hard to come up with a mathematical case
>  that a serious network problem exists in the networks
>  that are worried about traffic engineering.

????  2.5 - 15% ???  That would be nice, but I do not think its the case.
Backbone circuits are expensive and running them at this ration would be
uncompetitive.

>
>  http://www.slac.stanford.edu/comp/net/wan-mon/surveyor-vs-ripe.html
>
>  But, plain old IP routing won't provide TE. Fortunately
>  MPLS Constraint-Based Routing implicitly solves TE problems
>  along with fast rerouting and application to QoS/GoS.
>  MPLS supports, rather than extends, the IP QoS model.
>  Other major applications of MPLS is VPN support.
>
>  You can find useful information about TE at:  
>
>  http://www.cse.msu.edu/~xiaoxipe/
>
>  Previously, vendors had proprietary methods but the
>  increased L1/L2 technologies providing high bandwidths
>  obviates the need for TE. TE-WG has minimum requirements 
>  & recommendations for applicability:
>
>  http://www.ietf.org/internet-drafts/draft-ietf-tewg-framework-04.txt  
>
>
>--Venkata Naidu 
>
>  
>-> Hi,
>-> 
>-> I'm a student currently researching MPLS-TE technologies. 
>-> With all the 
>-> proposed methods and functionalities, I was wondering if 
>-> anyone has some 
>-> useful information/pointers to answers to the following questions:
>-> * How widely is traffic engineering over MPLS deployed in 
>-> today's networks?
>-> * What applications of MPLS are in use today (TE, 
>-> protection, BGP nexthop 
>-> resolution, etc)?
>-> * How widely used are TE offline planning tools?
>-> * How do different vendors affect different deployments? 
>-> That is, are the 
>-> common functionalities mostly in use, or are there different 
>-> proprietary 
>-> methods used in different networks/SPs?
>-> 
>-> Thanks a lot for any useful information,
>-> Shawn.