Common operational misconceptions

Owen DeLong owen at
Thu Feb 16 19:25:18 UTC 2012

I would say that the average University is more of an unusual ISP than a non-ISP.

Almost every University I know of has a networking group that functions like an ISP for the various departments of the college(s) as well as providing essentially residential ISP services to their
residence halls and in some cases fraternities, faculty housing, etc.

From a networking perspective they tend to operate much more like an ISP than an enterprise.

One of the key defining differences (IMHO) is that an enterprise (mostly) trusts the employees connected to its network whereas an ISP and a University cannot.


On Feb 16, 2012, at 6:08 AM, Shumon Huque wrote:

> We run IS-IS at the University of Pennsylvania as the IGP for
> IPv6. I know of a few other non-ISPs too but I won't speak for 
> them. At the time we initially deployed IPv6, it was pretty
> much one of the few safe choices (OSPFv3 implementations were 
> very new then).
> --Shumon.
> On Thu, Feb 16, 2012 at 12:00:04AM -0600, Kenneth M. Chipps Ph.D. wrote:
>> "ISIS is used in organizations other than ISPs" Any examples you can share
>> of some other than ISPs?
>> -----Original Message-----
>> From: Joel jaeggli [mailto:joelja at] 
>> Sent: Wednesday, February 15, 2012 11:58 PM
>> To: Kenneth M. Chipps Ph.D.
>> Cc: nanog at
>> Subject: Re: Common operational misconceptions
>> 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.
> -- 
> Shumon Huque
> University of Pennsylvania.

More information about the NANOG mailing list