John, Technologically speaking, IS-IS would probably be very well suited to such an environment, but more often than not, IS-IS only hits on two of the three criteria I most base a selection on:
1. Topology - Good Fit. Unlike OSPF, IS-IS isn't limited to a two-tier hierarchy, nor is there a need for a single "core". This flexibility can carry you a long way. 2. Design Goals - Good Fit. No question that you'll get good route selection, and "most direct" traffic flows, considering roughly equal amounts of traffic between each of the satellite locations, and the three main locations. 3. Supportable - ??? - This is usually the "Gotcha" that takes IS-IS out of the running in selecting a routing protocol. Like you mentioned, there just aren't a whole lot of people with a good deal of IS-IS experience, and those that have it are typically working in Big ISP environments, not "Corporate" networks. If this were for my own network, yeah, I could probably go with IS-IS and lead a happy life... As fate would have it, I design, deploy, and troubleshoot networks for other people (I'm a consultant). When I mention IS-IS to my cleints, they think I am referring to a goddess from the ancient Egyptian pantheon, or the kids TV show that ran parallel to Captain Marvel during the '70s (I loved his cape... Looked like it was made from Paper Towels). They don't know that there's a routing protocol of the same name. In Europe, perhaps there is a greater awareness of IS-IS in non-ISP environments, but in here in the US, it continues to languish for the most part as "The Undiscovered Protocol." Alan~ ----- Original Message ----- From: "John Neiberger" To: ; Sent: Thursday, December 13, 2001 2:50 PM Subject: What about ISIS? Re: OSPF or EIGRP [7:28966] > In an environment that large with no clearly defined > area 0, would not IS-IS also be a viable choice from > a technological standpoint? I understand that not as > many people are familiar with it but it seems like it > might be a good fit there. > > It seems like the argument is always EIGRP vs > OSPF, but I think people really should consider > IS-IS in the mix if it fits. > > What are your thoughts? > > John Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29137&t=28966 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
