OSPF vs IS-IS

jai231555 · ‎03-16-2009

Hi,

why there is variation in the usage of IGP (ospf/is-is) among ISPs. why some ISPs are using IS-IS while others use OSPF ?

what are the issues related to this ? whether management issues(cost, maintanance) or design issues(scalability, security)?

please tell me in detail.

thank you.

paolo bevilacqua · ‎03-16-2009

Hi, you will find that certain "high-end" ISPs uses IS-IS. It is however over engineered for most users where OSPF is just fine. No detailed discussion is possible withing this scope, you might need to go some 15 years in the cisco-nsp lists for one.

jai231555 · ‎03-28-2009

hi,

Just tell me why there is a debate between OSPF and IS-IS please.

thank you.

Edison Ortiz · ‎03-28-2009

You may find this article useful

http://www.nanog.org/mtg-0006/katz.html

HTH,

__

Edison.