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North American Network Operators Group

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Re: The Size of OSPF Network

  • From: HANSEN CHAN
  • Date: Fri Mar 31 16:50:18 2000

Thank you for the information.

What I'm also interested is what is the typical number of OSPF area in today's large ISP
backbone (if they are using OSPF, not IS-IS). Anyone has some input?

Thanks,
Hansen

"Daniel L. Golding" wrote:

> Disclaimer: This is a religious issue. This is also an issue that is
> non-operational and should be on PUCK...
>
> 200 routers seems excessive. 50 routers is much more reasonable. The
> important part is to limit external routes being redistributed into OSPF.
> External routes are bad mojo.
>
> Daniel Golding
> Senior Network Engineer
> NetRail, Inc.
> -----------------------
> dan@netrail.net
> (404) 739-4346
>
> On Fri, 31 Mar 2000, HANSEN CHAN wrote:
>
> >
> > Dear all,
> >
> > For the big ISP networks (tier 1 or 2) that happens to use OSPF, what is the typical
> > number of OSPF areas in the network? According to OSPF books, a typical area is
> > consisted of 200 routers. Are those guidelines ever followed in real ISP network
> > deployment?
> >
> > Any input is highly appreciated.
> >
> > Cheers,
> > Hansen
> >
> >
> >
> >






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