Virtual-System - HP FlexNetwork 3600 v2 Series Command Reference Manual

Parameters
maximum-interval: Maximum SPF calculation interval in seconds, ranging from 1 to 120.
initial-interval: Wait interval before the first SPF calculation, in milliseconds, ranging from 10 to
60000.
second-wait-interval: Wait interval before the second SPF calculation, in milliseconds, ranging from
10 to 60000.
Description
Use timer spf to set the SPF calculation interval.
Use undo timer spf to restore the default.
The default IS-IS SPF calculation interval is 10 seconds.
•
If only the maximum interval is specified, IS-IS waits the maximum interval before performing
the SPF calculation.
•
If both the maximum and initial intervals are specified:
IS-IS waits the initial interval before performing the first SPF calculation.
When SPF calculation triggers occur at intervals shorter than the maximum interval, the
topology is considered unstable and IS-IS waits the maximum interval before performing the
SPF calculation until the topology is stable.
•
If maximum-interval, initial-interval, and second-wait-interval are specified:
IS-IS waits the initial interval before performing the first SPF calculation.
When SPF calculation triggers occur at intervals shorter than the maximum interval, the
topology is considered unstable, IS-IS will wait the second-interval before performing the
second SPF calculation and penalty is applied on the wait interval for the next SPF
calculation. For each subsequent trigger, the wait interval before SPF calculation will be two
times the previous wait interval until the maximum interval is reached.
After the network topology becomes stable—triggers occur at intervals greater than the
maximum interval, the wait interval before SPF calculation is restored to the initial interval.
Examples
# Configure the maximum SPF calculation interval as 10 seconds, the wait interval before the first
SPF calculation as 100 milliseconds, and the wait interval before the second SPF calculation as 200
milliseconds.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] timer spf 10 100 200

virtual-system

Syntax
virtual-system virtual-system-id
undo virtual-system virtual-system-id
View
IS-IS view
Default level
2: System level
Parameters
virtual-system-id: Virtual system ID of the IS-IS process.
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