Excessive SPF calculation

Unanswered Question
Oct 15th, 2007

Dear all .

Urgent assistance needed:


Router currently experiencing high cpu utilization. On examining ospf , seems to be doing excessive spf calculation.


1. How can i determine the cause of the high SPF calculation

2. What are the recommended values for the SPF & LSA values, assuming you want to enable throttling

Loggs attached.


I have this problem too.
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bvsnarayana03 Mon, 10/15/2007 - 01:51

There seems no problems with area 200, as the last time SPF was run 1 week ago. However, the concern is area 0. Pls chk for any fluctuations of link frequently, CRC errors on link. Once the problem interface is identified, shut it & chk the performance.

If possible, clear ospf process once to reset the counters & get stats of sh ip ospf after every hour, to understand the trend.

To many acl's & route-maps are also a reason for high cpu at times.


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