HP 6125XLG R2306-HP 6125XLG Blade Switch FCoE Configuration Guide - Page 65

Configuring the shortest SPF calculation interval, Configuring the minimum LSR receiving interval,

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Step 2. Enter VSAN view. Command vsan vsan-id 3. Enable FSPF for the VSAN. fspf enable Remarks N/A By default, FSPF is enabled after a VSAN is created. Configuring the shortest SPF calculation interval When the LSDB changes, SPF calculations occur, which consume CPU resources. To prevent frequent SPF calculations from consuming too many CPU resources, you can configure 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 1. Enter system view. 2. Enter VSAN view. 3. Configure the shortest SPF calculation interval. Command system-view vsan vsan-id fspf spf-hold-time value Remarks N/A N/A The default setting is 0 second. Configuring the minimum LSR receiving interval The minimum LSR receiving interval specifies the time between receiving LSRs in a VSAN. Any LSR instances of the same LSR received within this time are dropped. This helps avoid frequent SPF calculations caused by LSDB updating. To configure the minimum LSR receiving interval: Step 1. Enter system view. 2. Enter VSAN view. 3. Configure the minimum LSR receiving interval. Command system-view vsan vsan-id fspf min-ls-arrival value Remarks N/A N/A 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: 59

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59
Step
Command
Remarks
2.
Enter VSAN view.
vsan
vsan-id
N/A
3.
Enable FSPF for the VSAN.
fspf enable
By default, FSPF is enabled after a VSAN is
created.
Configuring the shortest SPF calculation interval
When the LSDB changes, SPF calculations occur, which consume CPU resources. To prevent frequent SPF
calculations from consuming too many CPU resources, you can configure 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 receiving interval
The minimum LSR receiving interval specifies the time between receiving LSRs in a VSAN. Any LSR
instances of the same LSR received within this time are dropped. This helps avoid frequent SPF
calculations caused by LSDB updating.
To configure the minimum LSR receiving 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 receiving 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: