If there is a pattern in the database changes that you are seeing. For eg; particular routes which may be changing then you might be able to narrow down the router from where these changes may be getting propagated.
Shailesh [KUDOS PLEASE! If you think I earned it! If this solution worked for you please flag my post as an "Accepted Solution" so others can benefit..]
The OSPF database in an area will only change is there is any change in routing or connected routes ( Based on DHCP IPs changing etc ) . So amoung the 25 routers in the area , are you sure that the connected /static routes are not changed or any new routes are introuduced . If not , lets take a snapshot of the OSPF database and compare them manually to check if there is any change in routing .
> show ospf database
If still cannot find them , lets see if there is any change seen in traceoptions .
Do you see any impact in these route database change or traffic is not impacted ? Check for any OSPF flaps .
Please Mark My Solution Accepted if it Helped, Kudos are Appreciated too .....
why you claim database is changing and it's a problem (and not normal refresh) ? What do you look at ?
In case of Junos LSA refresh time is 50 minutes.
First, I would look at show ospf database output to identify LSAs changing frequently. Please look at increasing sequence numbers and/or Age close to 3600s (fresh LSA). This way you will discover the router(s) making your OSPF unstable.