ospf problems when re-joining networks

[Linden]

Hi

We are running OpenBSD 4.2 and ospfd on 3 boxes which are joined to each 
other by 3 seperate wan links.

I find when a particular wan link fails to a box, packets now take the 
other higher cost route as expected. But when the link comes back up, 
ospfd does not change back to using the original, shorter and adjacent 
route. Why could this be occurring?

Thanks
- Linden