As I think priscilla pointed out, Ciscopress has a book called Advanced IP
Network Design, which gives one of the best explainations of deploying a
large OSPF network.
Brian
On Fri, 13 Oct 2000, Jack Walker wrote:
> Brian,
>
> I am pretty sure there is no easy answer for my question. That is why I am
> more interested in you guys experience, if somebody says an OSPF area should
> not be larger than 50 routers(I read this from some books) and one of us
> jumps up and say I have designed one with 1000 routers in one area ans it is
> working fine. Then I would like to ask that guy what kind of routers he used
> at hub sites and remotes, and etc..
> Of course, if you have a general rule between the RAM/CPU and the number of
> the routers in the area, please let us know. I believe many of us want to
> learn that. Because reading books and caculating on the paper is some thing
> different than implementing something, at least it happens to me all the
> time.
>
> When say we are designing a network, it normally means our clients are
> ready to take whatever suggestions we give to them to improve their network.
> It makes sense that we will use total-stub area and nssa-area whereever
> possible and it we believe a router in an area of 2000 routers needs to have
> 128M, we just suggest them to buy it or just reduce the number of routers in
> the area.
>
> Please understand that I am not asking a detailed design for me, again, I am
> really interested in exchanging some of you guys experience on the scaling
> of OSPF.
>
> As Priscilla said 50 is the number Cisoc suggested, I read this from some
> books too, but there are many areas larger than this, but I want to know how
> far can I go? Not only one area also the whole OSPF network, Bill mentioned
> that 1million routers in one OSPF network, has anybody seen one network OSPF
> AS of 100 million routers?
>
> Thanks
>
> Jack
>
> --
>
> "Brian" <[EMAIL PROTECTED]> wrote in message
> [EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> >
> > Their are no hard and fast rules to answer questions like this. How are
> > the remotes connected? What type of media/speed?
> >
> > do the remotes have other external connectivity other than the link to
> > area0? do any of the remotes inject external routes (redistributing from
> > other protocols)?
> >
> > If the remote links are slower circuits, then I would definitly try to
> > make these totally stubby areas if possible.
> >
> > Let me also say, that when dealing with a network with 300 routers, alot
> > more information is needed than below to properly design the OSPF. i
> > would think at a minimum a good topology map and list of protocols,
> > interfaces, media at each router location.
> >
> > Brian
> >
> >
> > On Thu, 12 Oct 2000, Jack Walker wrote:
> >
> > >
> > > Group,
> > >
> > > We are trying to design an OSPF network for one of our clients who has
> about
> > > 300 routers.
> > > About 60 of them are in the Centeral Office, the rest of them are all
> > > remotes.
> > > We are thinking of put the 60 routers in the centeral into Area 0 and
> also
> > > put some of the remote ABRs into Area 0 too.
> > > The question for your experts out there is: in the largest OSPF network
> you
> > > have seen, how many routers are in Area 0?
> > > What is the maximun number of the routers in a non-backbone area?
> > > I know there are some deisign guides out there, but I just want to get
> an
> > > idea what you guys seeing in the real world.
> > >
> > > Any inputs will be helpful.
> > >
> > > Thanks
> > >
> > > Jack
> > > --
> > >
> > >
> > >
> > > _________________________________
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> >
> > -----------------------------------------------
> > Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
> > Network Administrator
> > ShreveNet Inc. (ASN 11881)
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
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> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
>
>
> _________________________________
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> Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
>
-----------------------------------------------
Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
Network Administrator
ShreveNet Inc. (ASN 11881)
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