From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Fri Nov 21 2003 - 13:32:54 GMT-3
At 7:41 AM -0800 11/21/03, zzk wrote:
>Hi
>I understand in a point to point link, it is better to
>change 'ip ospf cost' to the same value on both sides.
>However if in a broadcast media (e.g. multiple routers
>in a backbone vlan), if we change 'ip ospf cost' on
>one router interface only, what will be the impact?
>I feel ospf is a link state protocol, and all routers
Setting different costs, as opposed to different timer values, won't
break anything. I agree uniformity is better for troubleshooting, but
there very well may be reasons to have different costs.
Now, for your more specific example, with a different interface cost
on one router connected to a multiaccess link, does the router have
additional links that it can use to reach the same destination? In
that case, having a higher cost on the less-preferred link may be
perfectly valid means of expressing an intra-area routing policy.
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