The MPLS-OPS Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] RE: MPLS vs IP forwarding speed..
I'm sorry - I can't help myself...and have to step in here... The IETF RFC's contain all the actual reasons that what is now called MPLS generically evolved from cell switching or IP switching or Tag Switching - in other words the challenge of performance of IP forwarding over ATM fabric. These papers identify the reasons this technology developed. Much of the rest of the reasons enumerated here and in other places are great lore and marketing spins on the actual technology developments. Most of the pertinent RFC data and papers I refer to can be found around the 1900-2100 RFC range. There are many solutions and problem statements in the Ipsilon, NEC, IBM, Cisco, and Toshiba papers. This all began in the 1994-1995 time frame. Have fun with the actual history. ______________________________ Andrew Walding, President CellStream, Inc. 9812 Zembriski Drive, Plano TX 75025 Tel: 972-747-0007 Fax: 972-747-1130 www.cellstream.com > -----Original Message----- > From: sthaug@nethelp.no [mailto:sthaug@nethelp.no] > Sent: Thursday, April 21, 2005 11:11 AM > To: mpls-ops@mplsrc.com > Subject: Re: [MPLS-OPS]: MPLS vs IP forwarding speed.. > > > > http://cell.onecall.net/mhonarc/mpls/1997-Jul/msg00059.html > > > is another one which says it is faster > > > > Well, 1997 is the "stone ages" for MPLS, and lots of strange claims > > were made. > > Followup: In the message from Grenville Armitage referred to above: > > - #1 refers to forwarding based on caching the forwarding information. > It is not particularly relevant to today's *ASIC* based forwarding > engines. I believe it's not particularly relevant to CPU based > forwarding either: You would not *use* such a router precisely because > performance would be abysmal. > > - #2 refers to forwarding based on an ATM cell fabric. This, too, is > not particularly relevant today. > > So, my basic claim is that the world has moved on, and claims made in > 1997 about an MPLS forwarding speed advantage simply aren't relevant > today. > > Steinar Haug, Nethelp consulting, sthaug@nethelp.no > > ------- > The MPLS-OPS Mailing List > Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml > Archive: http://www.mplsrc.com/mpls-ops_archive.shtml > > MPLScon 2005 - May 16-19, NYC, NY > http://www.mplscon.com/ > > ------- The MPLS-OPS Mailing List Subscribe/Unsubscribe: http://www.mplsrc.com/mplsops.shtml Archive: http://www.mplsrc.com/mpls-ops_archive.shtml MPLScon 2005 - May 16-19, NYC, NY http://www.mplscon.com/
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