The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: IGP tuning for TE versus MPLS-TE
The article in IEEE communications and the article Mathew referenced are the same article. See http://www.research.att.com/~jrex [The group at ATT research has written a bunch of great papers. It's well worth a look.] Daniel Islam, Aziz writes: > Folks, > Another well-written article can be found in the October issue of IEEE > Communications magazine. The title is "Traffic Engineering with Traditional > IP Routing Protocols". > > > Aziz S. Islam > Sr.Infrastructure Splst.- CCIE(R/S) > EDS-Design Engineering > 33 Yonge Street; Suite 400 > Toronto, Ontario M5E 1G4 > CANADA > phone: (416)814-1696 > pager: (416)517-4985 > <mailto:aziz.islam@eds.com> mailto:aziz.islam@eds.com > <http://www.eds.com/> http://www.eds.com > > > > -----Original Message----- > From: Mathew Lodge [mailto:Mathew@CPlane.com] > Sent: October 30, 2002 11:25 AM > To: alok; M. ELK > Cc: mpls-ops@mplsrc.com > Subject: Re: [MPLS-OPS]: IGP tuning for TE versus MPLS-TE > > > All, > > There is an excellent discussion of optimal routing done via IGP metrics (no > MPLS) vs. explicit path selection (MPLS TE) from AT&T. You can find it at > > http://www.research.att.com/~jrex/papers/ieeecomm02.long.ps > <http://www.research.att.com/~jrex/papers/ieeecomm02.long.ps> > http://www.research.att.com/~jrex/papers/ieeecomm02.long.pdf > <http://www.research.att.com/~jrex/papers/ieeecomm02.long.pdf> > > Note that this paper is a discussion of theory -- i.e., it addresses how > close can you get to optimal routing using Dijkstra's SPF algorithm with > judicious link weight selection, and what happens to the efficiency of the > network when links fail and IGP re-routes traffic. In practice, I wonder how > disruptive it would be to a regular IP network to go around tinkering with > the link weights on every router with an offline TE tool (which this > approach mandates). > > Cheers, > > Mathew > > > At 03:26 PM 10/30/2002 +0530, alok wrote: > > > what do u do for "non ip" traffic ;o) > > can u "TE" it too with IGP tunning? > > > > -rgds > alok > > > ----- Original Message ----- > From: M. ELK <mailto:elkou141061@hotmail.com> > To: mpls-ops@mplsrc.com <mailto:mpls-ops@mplsrc.com> > Sent: Wednesday, October 30, 2002 3:01 PM > Subject: [MPLS-OPS]: IGP tuning for TE versus MPLS-TE > > Their is some hot debate previously on this list about an article on MPLS > which stated that no need for MPLS ,anyhow the conclusion from this debate > was that the writer of such article is clueless . > here is a doc from sprint which state exactly the same : > http://www.sprintbiz.com/business/resources/resource/SprintCiscoMPLS.pdf > <http://www.sprintbiz.com/business/resources/resource/SprintCiscoMPLS.pdf> > (guess ,could not state that they are clueless too . also the doc have the > cisco logo ) . > > need not to start another hot debate ,just need U comment on the possibility > and limitation of TE by tuning IGP versus MPLS-TE , any other provider > droped MPLS-TE favoring IGP tunning ? . > > Brgds > > > _____ > > Get a speedy connection with MSN Broadband. Join now! Click Here > <http://g.msn.com/8HMXEN/2021> ------- The MPLS-OPS Mailing List > Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml > <http://www.mplsrc.com/mplsops.shtml> Archive: > http://www.mplsrc.com/mpls-ops_archive.shtml > <http://www.mplsrc.com/mpls-ops_archive.shtml> > > | Mathew Lodge | mathew@cplane.com | > | Director, Product Management | Ph: +1 408 789 4068 | > | CPlane, Inc. | http://www.cplane.com > <http://www.cplane.com/> | > > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> > <HTML><HEAD> > <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=US-ASCII"> > > > <META content="MSHTML 5.00.3315.2870" name=GENERATOR></HEAD> > <BODY> > <DIV><FONT face="Courier New"><SPAN > class=352351118-30102002>Folks,</SPAN></FONT></DIV> > <DIV><FONT face="Courier New"><SPAN class=352351118-30102002>Another > well-written article can be found in the October issue of IEEE Communications > magazine. The title is "Traffic Engineering with Traditional IP Routing > Protocols".</SPAN></FONT></DIV> > <DIV> </DIV> > <P><FONT face="Courier New">Aziz S. Islam<BR>Sr.Infrastructure Splst.- > CCIE(R/S)<BR>EDS-Design Engineering<BR>33 Yonge Street; Suite 400<BR>Toronto, > Ontario M5E 1G4<BR>CANADA<BR>phone: (416)814-1696<BR>pager: > (416)517-4985<BR></FONT><A href="mailto:aziz.islam@eds.com"><FONT > face="Courier New">mailto:aziz.islam@eds.com</FONT></A><BR><A > href="http://www.eds.com/" target=_blank><FONT > face="Courier New">http://www.eds.com</FONT></A><BR><BR></P> > <BLOCKQUOTE style="MARGIN-RIGHT: 0px"> > <DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma > size=2>-----Original Message-----<BR><B>From:</B> Mathew Lodge > [mailto:Mathew@CPlane.com]<BR><B>Sent:</B> October 30, 2002 11:25 > AM<BR><B>To:</B> alok; M. ELK<BR><B>Cc:</B> > mpls-ops@mplsrc.com<BR><B>Subject:</B> Re: [MPLS-OPS]: IGP tuning for TE > versus MPLS-TE <BR><BR></DIV></FONT>All,<BR><BR>There is an excellent > discussion of optimal routing done via IGP metrics (no MPLS) vs. explicit path > selection (MPLS TE) from AT&T. You can find it at<BR><BR><A > href="http://www.research.att.com/~jrex/papers/ieeecomm02.long.ps" > eudora="autourl">http://www.research.att.com/~jrex/papers/ieeecomm02.long.ps</A><BR><A > href="http://www.research.att.com/~jrex/papers/ieeecomm02.long.pdf" > eudora="autourl">http://www.research.att.com/~jrex/papers/ieeecomm02.long.pdf</A><BR><BR>Note > that this paper is a discussion of theory -- i.e., it addresses how close can > you get to optimal routing using Dijkstra's SPF algorithm with judicious link > weight selection, and what happens to the efficiency of the network when links > fail and IGP re-routes traffic. In practice, I wonder how disruptive it would > be to a regular IP network to go around tinkering with the link weights on > every router with an offline TE tool (which this approach > mandates).<BR><BR>Cheers,<BR><BR>Mathew<BR><BR><BR>At 03:26 PM 10/30/2002 > +0530, alok wrote:<BR> > <BLOCKQUOTE class=cite cite type="cite"><FONT face=arial>what do u do for > "non ip" traffic ;o)</FONT><BR> <BR><FONT face=arial>can u "TE" it too > with IGP tunning?</FONT><BR> <BR> <BR> <BR><FONT > face=arial>-rgds</FONT><BR><FONT face=arial>alok</FONT><BR> > <BLOCKQUOTE class=cite cite type="cite">----- Original Message ----- > <BR><B>From:</B> <A href="mailto:elkou141061@hotmail.com">M. ELK</A> > <BR><B>To:</B> <A > href="mailto:mpls-ops@mplsrc.com">mpls-ops@mplsrc.com</A> <BR><B>Sent:</B> > Wednesday, October 30, 2002 3:01 PM<BR><B>Subject:</B> [MPLS-OPS]: IGP > tuning for TE versus MPLS-TE <BR><BR>Their is some hot debate previously > on this list about an article on MPLS which stated that no need for MPLS > ,anyhow the conclusion from this debate was that the writer of such > article is clueless . <BR>here is a doc from sprint which state exactly > the same :<BR><A > href="http://www.sprintbiz.com/business/resources/resource/SprintCiscoMPLS.pdf">http://www.sprintbiz.com/business/resources/resource/SprintCiscoMPLS.pdf</A><BR>(guess > ,could not state that they are clueless too . also the doc have the cisco > logo ) .<BR> <BR>need not to start another hot debate ,just need U > comment on the possibility<BR>and limitation of TE by tuning IGP versus > MPLS-TE , any other provider <BR>droped MPLS-TE favoring IGP tunning ? . > <BR> <BR>Brgds <BR><BR> > <HR> > Get a speedy connection with MSN Broadband. Join now! <A > href="http://g.msn.com/8HMXEN/2021">Click Here</A> ------- The MPLS-OPS > Mailing List Subscribe/Unsubscribe: <A > href="http://www.mplsrc.com/mplsops.shtml" > eudora="autourl">http://www.mplsrc.com/mplsops.shtml</A> Archive: <A > href="http://www.mplsrc.com/mpls-ops_archive.shtml" > eudora="autourl">http://www.mplsrc.com/mpls-ops_archive.shtml</A> > </BLOCKQUOTE><X-SIGSEP> > <P></X-SIGSEP>| Mathew > Lodge > | mathew@cplane.com |<BR>| Director, Product > Management | Ph: +1 408 789 4068 |<BR>| CPlane, > Inc. > | <A href="http://www.cplane.com/" > eudora="autourl">http://www.cplane.com</A> | > </P></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML> ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml
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