<P>Thanks for all those response.
<P>To my limited knowledge on MPLS implementation, many Telecommunication Cooperation
<P>have adopted MPLS in their service network, such as UUnet, AT&T. In China, ChinaTelecom has built up
<P>a experimental MPLS backbone accross multiple provinces, and China Unicom also built up a backbone alike.
<P>In deed, it seems MPLS network is not put directly to commercial usage in China but some of stuff in ChinaTelecom
<P>told me that they do care the VPN capacity, TE capacity and high performance promised by MPLS. The problem is
<P>the operators seem could not catch up with the complex configuration so fast. So, I don't understand
<P>why MPLS will not be used in large scale networks?
<P>To the performance difference between MPLS network and IP network, I totally agree with you IP router have achieve
<P>the same performance with MPLS. But, to our experiments with comparation between LSP and IP routing , there do exist
<P>some difference between LSP and IP routing. We've built a very small testbed to compare difference between LSP& IP routing,
<P>and we found that LSP shows lower jitter and packet loss rate under resource reservation scheme and best-effort service under low
<P>load. This is the reason why I asked the question.
<P>Best regards
<P>
<P> <B>Kav¨¦ Salamatian <salamat@rp.lip6.fr></B> µÄÕýÎÄ£º
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Dear Shen,<BR><BR>first of all I should mention that MPLS deployment is far from being done (I<BR>don't think that it has been deployed even in a large network operator) and<BR>I largely suspect that it will never be deployed in a large scale to be the<BR>primary backbone technology !!!!<BR><BR>From the point of view of measurement, LSP networks should not have too much<BR>difference from traditional IP networks as nowadays IP routing performance<BR>is getting very close to Label switching performance, meaning that the<BR>delay of crossing an LSP network should not be significantly larger than an<BR>IP network. The difference may come from a simpler traffic engineering in<BR>MPLS. Meaning that we should evaluate the effect of traffic engineeringon<BR>performance, not the particuliar behaviour of MPLS network.<BR><BR>Bests<BR><BR>Kv<BR>-----Message d'origine-----<BR>De?: ippm-admin@advanced.org [mailto:ippm-admin@advanced.org]De la part de<BR>Shen Jing<BR>Envoy¨¦?: dimanche 29 septembre 2002 04:28<BR>¨¤?: end2end-interest@postel.org<BR>Cc?: ippm@advanced.org<BR>Objet?: [ippm] [e2e] Mathematical analysis of e2e lable switching path<BR><BR><BR>Hi there,<BR><BR>I've some question on e2e performance analysis of<BR>label switching path.<BR><BR>There has been many research on e2e performance<BR>analysis for IP routing. Nearly all of them take the<BR>model of "network of queue", and under assumpiton of<BR>Possion Arrival, exponential flow size etc. To my<BR>limited knowledge, this is not to the state of<BR>Internet which experiences LRD. On the other hand,<BR>different router archtecture must have different<BR>effect on transmission performance.<BR>As MPLS proceeds to be the primary backbone<BR>technology, I think there must be something new<BR>introduced into the e2e performance in internet.<BR><BR>So, I want to know, whether there is some work with<BR>methematical modeling of LSP networks? and, are there<BR>anyone would do me a favor to recommend some refrence<BR>book, web page, research paper or the like ?<BR><BR>Thank you very much.<BR><BR>Best regards<BR><BR></BLOCKQUOTE><BR><BR>Jing Shen<br><br>State Key Lab of CAD&CG<br>ZheJiang University(YuQuan)<br>HangZhou, ZheJiang Province 310027<br>P.R.China<p><br><hr size=1><b>Do You Yahoo!?</b><br>
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