I have go the some type problems . Say R1 —R2-R3. R1 use RID10.10.0.1 and it got svu under this /24 subnet . R2 set RID 10.10.0.2 but do not have interface for this subnet. And R3 set RID 10.20.0.1 have interface under this subnet. The result will be R2 will established neighbor full width of the R1 and R3 , R2 will learn route from R1 and R3, R2 will advertise R1 and self route to R3. But R2 will not advertise self and TO route to R1. And R1 RY both will have this flood error. Even under R1 no other device using 10.10.0.2. I think it could be some thing to do with LSA messages identification logic. And if you apply route id that is not the device interface ip but ospf instance have this Subnet and use one ip as RID the LSA will not updated to the device that has this subnet .(this message Will play out). If has an other devices use the router id then will have messages duplicate IP. So conclusion is to manual ospf router id needs 1. No other devices using the IP that mean unique under ospf. 2.bast have interface Svi loopback all OK to own this ip. 3. if assign route id ip subnet is not own by device interface and within ospf instance has other route adv and has same subnet different ip use as route id, the route opf map will not pass between them.
If I change the R2 RID to 10.0.10.2 the ospf will work , or if R2 own an interface has IP 10.10.0.2/32 and advance in to ospf, and R1 do not have some length route for 10.10.0.2. the ospf will work.
