IGPs in use
Danny McPherson
danny at genuity.net
Mon Oct 12 23:47:12 UTC 1998
> 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
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