How to Configure LSA Group Pacing

OSPF LSA group pacing is enabled by default. For typical customers, the default group pacing interval for refreshing, checksumming, and aging is appropriate, and you do not need to configure this feature. The pacing interval is configurable; it defaults to 4 minutes, which is randomized to further avoid synchronization.

The group pacing interval is inversely proportional to the number of LSAs that the router is refreshing, checksumming, and aging. For example, if you have approximately 10,000 LSAs, decreasing the pacing interval would be beneficial. If you have a small database (40 to 100 LSAs), increasing the pacing interval to 10 to 20 minutes might benefit you slightly.

The default value of pacing between LSA groups is 240 seconds (4 minutes). The range is 10 seconds to 1800 seconds (half an hour). To configure the LSA group pacing interval, you would enter the following commands in router configuration mode:

router ospf 100

timers lsa-group-pacing 60

This configuration changes the OSPF pacing between LSA groups to 60 seconds.

router ospf 100

timers lsa-group-pacing 60

This configuration changes the OSPF pacing between LSA groups to 60 seconds.

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