That's true, I didn't bother to try the math at all but it would be
possible. However the thought of having thousands of routers connected
within 15 hops running RIP makes me somewhat queasy :-)
At 10:18 PM 5/21/01, you wrote:
>I rechecked the NANOG archive, and I believe you are correct. It was several
>thousand nodes.
>
>As to the number of routers theoretically possible in a RIP domain, you
>might be surprised if you were to think through the math.
>
>Take a router. Connect ten routers. Connect ten routers to each of those
>ten. You can do this seven times, and the max distance from any router on
>the periphery to any other router on the periphery is 15 hops - seven in
>and seven out again.
>
>10^7 = 10,000,000
>
>if that center router began with 100 directly connected routers, the number
>grows astronomically, and yet the max diameter would remain 15 hops.
>
>the real restraint would be the ability of the router to hold a routing
>table that big. Along with the problem of convergence. Even if there were no
>network problems ever, I bet that sucker would take forever to converge!
>Literally!
>
>Chuck
>
>-----Original Message-----
>From: Curtis Call [mailto:[EMAIL PROTECTED]]
>Sent: Monday, May 21, 2001 6:38 PM
>To: Chuck Larrieu
>Cc: [EMAIL PROTECTED]
>Subject: RE: How is IS-IS more scalable than OSPF? [7:5207]
>
>
> >BTW, I have been told by folks who work in really big networks that none
of
> >the routing protocols scale beyond 4-5K routers. As an interesting aside,
a
> >few weeks ago on NANOG there was a discussion about the largest RIPv1
> >network in existence. It was revealed that until a year or two ago, Xerox
> >used RIPv1 and had a few thousand routers running RIPv1 on the network.
>
>
>I believe that the RIP network you are referring to had a few thousand
>nodes, not a few thousand routers. I doubt a few thousand routers could
>handle RIPs max 15 hop limitation.
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=5376&t=5207
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