Isn't that because Dave re-wrote all of the IS-IS code? ;-) - ferg -- vijay gill <vgill@vijaygill.com> wrote: Daniel, in short, we've found ISIS to be slightly easier to maintain and run, with slightly more peace of mind in terms of securitiy than OSPF. Performance and stability wise, no major difference that was noticable. For more information, see the talk by Dave Katz at http://www.nanog.org/mtg-0006/katz.html Also, AOL's experience in switching from OSPF to ISIS is covered at http://www.nanog.org/mtg-0310/gill.html the PDF on that page is actually an older version. The full version I used at NANOG is available at http://www.vijaygill.com/oi.pdf /vijay -- "Fergie", a.k.a. Paul Ferguson Engineering Architecture for the Internet fergdawg@netzero.net or fergdawg@sbcglobal.net ferg's tech blog: http://fergdawg.blogspot.com/