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Re: Common operational misconceptions
From: Joel jaeggli <joelja () bogus com>
Date: Wed, 15 Feb 2012 21:57:35 -0800

On 2/15/12 21:04 , Kenneth M. Chipps Ph.D. wrote:
How widespread would you say the use of IS-IS is?

Even more as to which routing protocols are used, not just in ISPs, what
percent would you give to the various ones. In other words X percent of
organizations use OSPS, Y percent use EIGRP, and so on.

Using EIGRP implies your routed IGP dependent infrastructure is a
monoculture. That's probably infeasible without compromise even if you
are largely a Cisco shop.

ISIS is used in organizations other than ISPs.

-----Original Message-----
From: Antti Ristimäki [mailto:antti.ristimaki () gmx com] 
Sent: Wednesday, February 15, 2012 10:47 PM
To: John Kristoff
Cc: nanog () nanog org
Subject: Re: Common operational misconceptions

"IS-IS is a legacy protocol that nobody uses"


15.02.2012 22:47, John Kristoff kirjoitti:
Hi friends,

As some of you may know, I occasionally teach networking to college 
students and I frequently encounter misconceptions about some aspect 
of networking that can take a fair amount of effort to correct.

For instance, a topic that has come up on this list before is how the 
inappropriate use of classful terminology is rampant among students, 
books and often other teachers.  Furthermore, the terminology isn't 
even always used correctly in the original context of classful addressing.

I have a handful of common misconceptions that I'd put on a top 10 
list, but I'd like to solicit from this community what it considers to 
be the most annoying and common operational misconceptions future 
operators often come at you with.

I'd prefer replies off-list and can summarize back to the list if 
there is interest.

John










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