timers (OSPFv3)

Configures Link State Advertisement (LSA) pacing and Shortest Path First (SPF) timers.

Syntax

timers { lsa-group-pacing interval | spf start hold }

Command Default

Enabled.

Parameters

lsa-group-pacing interval

Specifies the interval at which OSPFv3 LSAs are collected into a group and refreshed, check-summed, or aged by the OSPFv3 process. Valid values range from 10 to 1800 seconds. The default is 240 seconds.

spf

Specifies start and hold intervals for SPF calculations for performance. The values you enter are in milliseconds.

start: Initial SPF calculation delay. Valid values range from 0 to 65535 seconds.
hold: Minimum hold time between two consecutive SPF calculations. Valid values range from 0 to 65535 seconds.

Modes

OSPFv3 router configuration mode

OSPFv3 router VRF configuration mode

Usage Guidelines

The device paces LSA refreshes by delaying the refreshes for a specified time interval instead of performing a refresh each time an individual LSA refresh timer expires. The accumulated LSAs constitute a group, which the device refreshes and sends out together in one or more packets.

The LSA pacing interval is inversely proportional to the number of LSAs the device is refreshing and aging. For example, if you have a large database of 10,000 LSAs, decreasing the pacing interval enhances performance. If you have a small database of about 100 LSAs, increasing the pacing interval to 10 to 20 minutes may enhance performance.

The no timers lsa-group-pacing command restores the pacing interval to its default value.

The no timers spf command sets the SPF timers back to their defaults.

Examples

The following example sets the LSA group pacing interval to 30 seconds.

device# configure terminal
device(config)# ipv6 router ospf 
device(config-ipv6-router-ospf-vrf-default-vrf)# timers lsa-group-pacing 30

The following example sets the SPF delay time to 10 and the hold time to 20.

device# configure terminal
device(config)# ipv6 router ospf
device(config-ipv6-router-ospf-vrf-default-vrf)# timers spf 10 20