I think Dom is referring to the adoption process, not the protocol definition/development. IS-IS was defined before OSPF, IMHO.
On the other hand, I would be interested to hear why IS-IS was (is?) more scalable. In particular, what are those 3 largish tables and why would OSPF need to scale to multiple AS's? Thanks, Zsombor Reimer, Fred wrote: > > You wrote: > > " A few years ago we were all (well some of us) scared about the > scalability of OSPF - how much memory, processing power and how > many > AS's could it scale to. This is why IS-IS was looked at by tier > 1 and 2 > carriers. In those days, a 7206 with a 150MHz proc was common > place, and > we were running out of space for the 3 tables (largish) > required and > looking for something new." > > I'm a little confused by that. I always thought that IS-IS was > old as dirt, > and that OSPF was based on IS-IS. You make it sound like OSPF > was around > first, and that IS-IS was the "something new" that was designed > due to > OSPF's scalability issues. What is the correct order? > > Fred Reimer - CCNA > > > Eclipsys Corporation, 200 Ashford Center North, Atlanta, GA > 30338 > Phone: 404-847-5177 Cell: 770-490-3071 Pager: 888-260-2050 > > > NOTICE; This email contains confidential or proprietary > information which > may be legally privileged. It is intended only for the named > recipient(s). > If an addressing or transmission error has misdirected the > email, please > notify the author by replying to this message. If you are not > the named > recipient, you are not authorized to use, disclose, distribute, > copy, print > or rely on this email, and should immediately delete it from > your computer. > > > -----Original Message----- > From: Dom [mailto:[EMAIL PROTECTED] > Sent: Monday, September 01, 2003 6:46 PM > To: [EMAIL PROTECTED] > Subject: RE: IS-IS [7:74508] > > >the answer is simple and practical. What with the one day lab > and the > speed with which cheats get circulated, lab > >scenarios are revised much more often than they used to. > Adding IS-IS > allows for more permutations to add to the mix. > >Especially now that IGRP is no longer there. The proctors > still need > lots of ways to screw you with redistribution. IS-IS > >redfistribution gives them that in spades. ;-> > > A few years ago we were all (well some of us) scared about the > scalability of OSPF - how much memory, processing power and how > many > AS's could it scale to. This is why IS-IS was looked at by tier > 1 and 2 > carriers. In those days, a 7206 with a 150MHz proc was common > place, and > we were running out of space for the 3 tables (largish) > required and > looking for something new. > > > Best regards, > > Dom Stocqueler > SysDom Technologies > Visit our website - www.sysdom.org > **Please support GroupStudy by purchasing from the GroupStudy > Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=74835&t=74508 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
