[22480] in North American Network Operators' Group

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Re: IGP Comparison (Summary of Responses)

daemon@ATHENA.MIT.EDU (Scott Brim)
Tue Jan 5 14:52:45 1999

Reply-To: "Scott Brim" <swb@newbridge.com>
From: "Scott Brim" <swb@newbridge.com>
To: "Henk Smit" <hsmit@cisco.com>
Cc: <nanog@merit.edu>
Date: Tue, 5 Jan 1999 14:29:16 -0500

From: Henk Smit <hsmit@cisco.com>

>  Most of the large ISPs in the US run IS-IS as their IP IGP.
> In europe a number of PTTs have chosen IS-IS as the IGP for their new
> IP Internet backbones. That might be an indication if IS-IS is dead.

This points out the real issue.  OSPF and IS-IS are close enough that other
factors usually outweigh their differences.  The choice of IS-IS in this
case is really the result of the choice of an equipment vendor.  These days
at least, vendors are not chosen because they implement IS-IS.  IS-IS is
chosen because of some vendors' protocol implementations.


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