[ippm] [e2e] Mathematical analysis of e2e lable switching path

[Ayyasamy, Senthilkumar (UMKC-Student)]

> -----Original Message-----
> From: Kav?Salamatian [mailto:salamat at rp.lip6.fr]
> Sent: Thursday, October 03, 2002 2:57 AM
> To: Shen Jing; end2end-interest at postel.org
> Cc: ippm at advanced.org
> Subject: RE: [ippm] [e2e] Mathematical analysis of e2e lable 
> switching path
[...]
> The difference may come from a simpler  traffic 
> engineering in
> MPLS. Meaning that we should evaluate the effect of traffic 
> engineeringon
> performance, not the particuliar behaviour of MPLS network.

  My thought is, even for traffic engineering MPLS is not
necessary. The benefits you get from constrained routing
can easily be achived by means of some OMP in OSPF. Researchers
have achived the same Traffic engineering objective by optimizing 
OSPF weights in  backbone network. AT&T's netscope is a standing
example. Some of the traffic-aware routing schemes will also help
in achieving the MPLS promises.
 But, MPLS is still relevant for some of the VPN based and access
based solutions. 
 As for as TE by OSPF weight optimization, all the present works
consider link weight assignment as a static problem. One have to
account various network dynamic (i.e..link failures) while 
optimizing OSPF weights. Also, I dont know how well the optimization
techniques  like local search heuristics/tabu search help
load balance a practical network.