North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: IGPs in use
> 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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