From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Fri Sep 06 2002 - 12:28:05 GMT-3
At 10:42 AM -0400 9/6/02, Larson, Chris wrote:
>You have opened a can of worms. Arguments of OSPF vs. EIGRP have gone on for
>a long time when in fact you cannot say that one is better then the other
>until you apply it to your situation. You need to know both (operationally
>and functionally) and then make a determination as to which is best for your
>situation, or meets the requirements fo your task.
>
> There are times when one might be favorable or even necessary over the
>other. If you are designing for Qwest then there is probably no question as
>to which one you would want to use.
Last time I looked at Qwest's ISP network, they used OSPF in the edge
and ISIS in the core. The rationale was that OSPF had better
propagation control, while ISIS was more scalable in a stable core.
The OSPF hierarchy has traditionally been more flexible than that of ISIS.
You can implement hierarchy in EIGRP, and it's even more
flexible...but that flexibility is labor-intensive and has no
mechanism for forcing discipline. ISIS and OSPF do.
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