[c-nsp] OSPF VS ISIS

vijay gill vgill at vijaygill.com
Mon Feb 27 08:53:26 EST 2006

Vincent De Keyzer wrote:
>> But in a properly designed network, both protocols
>> can converge in sub-second..
> My OSPF network is far from converging sub-second (so according to you it is
> far from being properly designed - fine, I can take criticism :)
> First of all, link failure on Ethernet links takes 30 to 40 seconds to
> detect... is there anyway to speed this up?

use BFD.

> Then, even after failure detection, I have the feeling it still takes 3 to 5
> seconds to converge...
> What am I doing wrong?

User a later code build.

Now ospf vs isis. We went with ISIS for a few reasons, security among 
them. It was trivial for our noc staff to learn, it is not like it is a 
complicated protocol.

here are our experiences, as given at a talk in NANOG in chicago a few 
years ago. http://www.vijaygill.com/work/ppt/oi.pdf


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