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RE: Re: CSPF numbers...

  • From: "Zartash Afzal Uzmi" <zartash@lums.edu.pk>
  • Date: Sat, 25 Sep 2004 17:18:17 +0500
  • Cc: <mpls-ops@mplsrc.com>
  • Importance: Normal
  • Resent-Date: Sat, 25 Sep 2004 08:50:19 -0400

In a simulated environment, for 26 nodes, 10,000 random LSPs, one of my
graduate student was able to place primaries as well as local backups within
9 seconds on a 2.something GHz wintel laptop in Java. Computing only
primaries will take perhaps 10-20% of this time. Throw in a C environment on
a specially designed hardware, I would expect less than a second.

> -----Original Message-----
> From: mpls guy [mailto:mplsguy@gmail.com]
> Sent: Saturday, September 25, 2004 1:17 AM
> To: zartash@lums.edu.pk
> Subject: Re: [MPLS-OPS]: Re: CSPF numbers...
>
>
> I am just looking for some base line numbers  I know it would depend
> upto the network size and constraints. It would not be that different
> from the SPF numbers. For argument sake say there are 20 nodes and
> they are fully meshed with priority and bandwidth attributes, I am
> curious to findout what might be the CSPF values.
>
>
>
> On Sat, 25 Sep 2004 00:40:22 +0500, Zartash Afzal Uzmi
> <zartash@lums.edu.pk> wrote:
> > There is no fixed answer. The time to compute this is primarily
> dependent
> > upon the processor you throw in your LSR for doing this computation. It
> > would also depend upon the constraints you specify, size of the
> network, and
> > to some extent how much pre-existing traffic you have on the
> network. I am
> > not even talking about the software efficiency...
> >
> > zartash
> >
> > > -----Original Message-----
> > > From: mpls guy [mailto:mplsguy@gmail.com]
> > > Sent: Friday, September 24, 2004 7:10 AM
> > > To: mpls-ops@mplsrc.com
> > > Subject: [MPLS-OPS]: Re: CSPF numbers...
> > >
> > >
> > > what I mean is how much time dose it take for cspf to calculate when
> > > you have 100, 200, 300 ingress lsp's. I am just looking for scalabilty
> > > numbers or baseline info.
> > >
> > >
> > > On Thu, 23 Sep 2004 17:23:31 -0400, mpls guy
> <mplsguy@gmail.com> wrote:
> > > > Does anyone have CSPF numbers matrix like accaptable cspf
> numbers for
> > > > 100, 200, 300 lsps etc...
> > > > thanks
> > > >
> > >
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