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Re: MPLS vs IP forwarding speed..

  • From: sthaug@nethelp.no
  • Date: Thu, 21 Apr 2005 18:11:22 +0200
  • Resent-Date: Thu, 21 Apr 2005 12:44:50 -0400
  • X-Scanned-By: MIMEDefang 2.45

> > 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

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