[f-nsp] Next SPF run wait

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 ospf

OSPF Version Version 2

Router 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) -177170950

External 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 120

Graceful Restart Helper: Enabled

BFD: 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

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