Reference v4.1.0 Instruction Manual

1322 Network OS Command Reference
53-1003115-01
timers
2
timers
Configures Link State Advertisement (LSA) pacing and Shortest Path First (SPF) throttle timers.
Synopsis timers {lsa-group-pacing interval | throttle spf start hold max}
Operands lsa-group-pacing interval Specifies the interval at which OSPF LSAs are collected into a group and
refreshed, check-summed, or aged by the OSPF process. Valid values range
from 10 to 1800 seconds. The default is 240 seconds.
throttle spf Specifies start, hold and maximum wait intervals for throttling SPF
calculations for performance. The values you enter are in milliseconds.
start Initial SPF calculation delay. Valid values range from 0 to
60000 milliseconds. The default is 0 milliseconds.
hold Minimum hold time between two consecutive SPF calculations. Valid values
range from 0 to 60000 milliseconds. The default is 5000 milliseconds.
max Maximum wait time between two consecutive SPF calculations.Valid values
range from 0 to 60000 milliseconds. The default is 10000 milliseconds.
Defaults Referto the Operands for specific defaults.
Command Modes OSPF VRF router configuration mode
Description Use this command to configure LSA pacing and SPF throttle timers.
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.
Enter the no timers lsa-group-pacing to restore the pacing interval to its default value.
Enter no timers throttle spf to set the SPF timers back to their defaults.
Examples To set the LSA group pacing interval to 30 seconds:
switch# configure
switch(config)# rbridge-id 5
switch(config-rbridge-id-5)# router ospf
switch(config-router-ospf-vrf-default-vrf)# timers lsa-group-pacing 30
To change the SPF delay to 10000 milliseconds, the hold time to 15000 milliseconds, and the
maximum wait time to 30000 milliseconds:
switch# configure
switch(config)# rbridge-id 5
switch(config-rbridge-id-5)# router ospf
switch(config-router-ospf-vrf-default-vrf)# timers throttle spf 10000 15000 30000
See Also None