HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Routing Command Referenc - Page 205

virtual-system

Page 205 highlights

minimum-interval: Specifies the minimum SPF calculation interval in the range of 10 to 60000 milliseconds. incremental-interval: Specifies the incremental SPF calculation interval in the range of 10 to 60000 milliseconds. Usage guidelines Based on the LSDB, an IS-IS router uses the SPF algorithm to calculate a shortest path tree with itself being the root, and uses the shortest path tree to determine the next hop to a destination network. By adjusting the SPF calculation interval, you can prevent bandwidth and router resources from being overused due to frequent topology changes. When network changes are not frequent, the minimum-interval is adopted. If network changes become frequent, the SPF calculation interval is incremented by the incremental-interval each time a generation happens until the maximum-interval is reached. The minimum interval and the incremental interval cannot be greater than the maximum interval. Examples # Configure the maximum interval as 10 seconds, the minimum interval as 100 milliseconds, and the incremental interval as 300 milliseconds. system-view [Sysname] isis 1 [Sysname-isis-1] timer spf 10 100 300 virtual-system Use virtual-system to configure a virtual system ID for the IS-IS process. Use undo virtual-system to remove a virtual system ID. Syntax virtual-system virtual-system-id undo virtual-system virtual-system-id Default No virtual system ID is configured. Views IS-IS view Predefined user roles network-admin Parameters virtual-system-id: Specifies a virtual system ID for the IS-IS process. Examples # Set a virtual system ID of 2222.2222.2222 for IS-IS process 1. system-view [Sysname] isis 1 [Sysname-isis-1] virtual-system 2222.2222.2222 194

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194
minimum-interval
: Specifies the minimum SPF calculation interval in the range of 10 to 60000
milliseconds.
incremental-interval
: Specifies the incremental SPF calculation interval in the range of 10 to 60000
milliseconds.
Usage guidelines
Based on the LSDB, an IS-IS router uses the SPF algorithm to calculate a shortest path tree with itself being
the root, and uses the shortest path tree to determine the next hop to a destination network. By adjusting
the SPF calculation interval, you can prevent bandwidth and router resources from being overused due
to frequent topology changes.
When network changes are not frequent, the
minimum-interval is
adopted
.
If network changes become
frequent, the SPF calculation interval is incremented by the
incremental-interval
each time a generation
happens until the
maximum-interval
is reached.
The minimum interval and the incremental interval cannot be greater than the maximum interval.
Examples
# Configure the maximum interval as 10 seconds, the minimum interval as 100 milliseconds, and the
incremental interval as 300 milliseconds.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] timer spf 10 100 300
virtual-system
Use
virtual-system
to configure a virtual system ID for the IS-IS process.
Use
undo virtual-system
to remove a virtual system ID.
Syntax
virtual-system
virtual-system-id
undo virtual-system
virtual-system-id
Default
No virtual system ID is configured.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
virtual-system-id
: Specifies a virtual system ID for the IS-IS process.
Examples
# Set a virtual system ID of 2222.2222.2222 for IS-IS process 1.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] virtual-system 2222.2222.2222