[20424] in North American Network Operators' Group
Re: IGPs in use
daemon@ATHENA.MIT.EDU (Danny McPherson)
Mon Oct 12 19:57:58 1998
To: nanog@merit.edu
From: Danny McPherson <danny@genuity.net>
Reply-To: danny@genuity.net
Date: Mon, 12 Oct 1998 16:47:12 -0700
> it probably depends on what you mean by "large". If you mean "the 5 largest"
> then yes, most use ISIS (but not all). If you mean the 50 largest, then
> OSPF becomes much more prominent (that is, hardly anyone but the largest
> ISPs use ISIS, at least from my discussions with dozens at my previous
> and current employer).
Likely because their networks have been 'round the longest and ISIS was the
"IGP of choice" not long ago. Also, some have/had requirements for ISO CLNS
ISIS routing support as well.
The use of ISIS shouldn't lead folks to believe that OSPF doesn't scale well
though.
-danny
