H3C Technologies H3C S5830V2 Series Switches - Manual (Page 76)

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Configuring the shortest SPF calculation interval
SPF calculations occur when the LSDB changes. To limit the amount of CPU resources consumed by
frequent SPF calculations, you can change the shortest SPF calculation interval.
The shortest SPF calculation interval defines the minimum interval between two consecutive SPF
calculations. A smaller value means that FSPF responds faster to fabric changes by recalculating routes
in a VSAN, but it requires more CPU resources.
To configure the shortest SPF calculation interval:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VSAN view. vsan vsan-id N/A
3. Configure the shortest SPF
calculation interval.
fspf spf-hold-time value The default setting is 0 second.
Configuring the minimum LSR arrival interval
The minimum LSR arrival interval specifies the period between receiving LSR updates in a VSAN. Any LSR
updates that arrive before the minimum LSR arrival interval expires are dropped. This helps avoid
frequent SPF calculations caused by LSDB updating.
To configure the minimum LSR arrival interval:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VSAN view. vsan vsan-id N/A
3. Configure the minimum
LSR arrival interval.
fspf min-ls-arrival value The default setting is 1 second.
Configuring the minimum LSR refresh interval
The minimum LSR refresh interval specifies the interval at which LSRs are refreshed. To reduce SPF
calculations and LSR flooding in a fabric caused by frequent LSR refreshing, the switch cannot refresh
local LSRs within this interval.
To configure the minimum LSR refresh interval:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VSAN view. vsan vsan-id N/A
3. Configure the minimum
LSR refresh interval.
fspf min-ls-interval value The default setting is 5 seconds.