Read that book while ago, still it does not give us any insights on how
some of the largest OSPFareas/networks in the world look like.
Jack
"Brian" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
>
> 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
> > > > --
> > > >
> > > >
> > > >
> > > > _________________________________
> > > > FAQ, list archives, and subscription info:
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> > > >
> > >
> > > -----------------------------------------------
> > > Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
> > > Network Administrator
> > > ShreveNet Inc. (ASN 11881)
> > >
> > > _________________________________
> > > FAQ, list archives, and subscription info:
> > http://www.groupstudy.com/list/cisco.html
> > > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> > >
> >
> >
> > _________________________________
> > FAQ, list archives, and subscription info:
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> > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
> >
>
> -----------------------------------------------
> Brian Feeny, CCNP, CCDP [EMAIL PROTECTED]
> Network Administrator
> ShreveNet Inc. (ASN 11881)
>
> _________________________________
> FAQ, list archives, and subscription info:
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>
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