OSPF vs IS-IS

Unanswered Question
Mar 16th, 2009
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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.

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paolo bevilacqua Mon, 03/16/2009 - 20:35
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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 Sat, 03/28/2009 - 01:52
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hi,

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

thank you.

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