Hi, Any ideas, what "Next SPF run wait" actually means in the following output? It is a large negative value which is increasing by absolute value (will never reach zero). It looks like it never runs SFP as the box doesn't install new routes. I see that it learns the LSAs but it never uses them as routes: show ip routes / show ip ospf routes don't show theses routes, while I see the corresponding LSAs in the OSPF DB. All the neighbor state machinery works well. But active routes are never updated even if an interfaces and a corresponding neighbor fail. SSH@CER#show ip ospfOSPF Version Version 2Router Id 10.x.x.x ASBR Status No ABR Status No (0)Redistribute Ext Routes from Initial SPF schedule delay 0 (msecs)Minimum hold time for SPFs 0 (msecs)Maximum hold time for SPFs 0 (msecs)Next SPF run wait (msecs) -177170950External LSA Counter 0 External LSA Checksum Sum 00000000 Originate New LSA Counter 89 Rx New LSA Counter 3260 External LSA Limit 14447047 Database Overflow Interval 0 Database Overflow State : NOT OVERFLOWED RFC 1583 Compatibility : Enabled NSSA Translator: Enabled Nonstop Routing: Disabled Graceful Restart: Disabled, timer 120Graceful Restart Helper: EnabledBFD: Enabled I checked other NetIron boxes (CERs and MLXes) but this line is just not present in the output. We saw this behavior on another CERs, fixed this by a reboot. Unfortunately I don't have "show ip ospf" before the reboot from those boxes, now this line (Next SFP run wait) is just not present on the rebooted boxes. Looks like a bug, but maybe I am missing something. Can't it be something like SPF throttling and maybe there is a way to clear this state less disruptively? On the other hand, "clear ip ospf all" did not help yesterday. --Kind regards,Pavel