[c-nsp] OSPF on Ring Networks

[Nick Hilliard]

On 12/05/2011 23:29, Mohammad Khalil wrote:
> i have a ring consisting of 11 devices , 2 devices are connected to the
> border router (handles 3 international links) via Cisco SCE
> OSPF is configured as the IGP
> what is the optimal design for OSPF inside the ring network i have ?

There is no "correct" answer to this question.  It depends completely on 
your traffic profile.  Probably the default ospf settings will do a 
reasonable job of handling this situation.  And given that it's only 11 
devices, there's no reason not to have them all in the same ospf area.

Other than that, you need to keep as few prefixes as possible in your IGP 
(preferably only loopbacks, with everything else carried in ibgp).  You 
should also probably drop the default hello/dead time from 10/40 seconds to 
something a lot lower (e.g. 1/4 seconds), unless some of your routers are 
slow or busy.

Nick