R0106-HP MSR Router Series Layer 3 - IP Routing Command Reference(V7)

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tag: Specifies an administrative tag in the range of 1 to 4294967295.
Usage guidelines
If no level is specified, the command applies to Level-2.
You can summarize routes with the same next hop into a single route to reduce the size of the routing
table, as well as the size of the LSDB. This command can summarize both learned and redistributed IPv6
IS-IS routes. The cost of the summary route is the smallest cost of those summarized routes.
Examples
# Configure a summary route of 2002::/32.
<Sysname> system-view
[Sysname] isis
[Sysname-isis-1] address-family ipv6
[Sysname-isis-1-ipv6] summary 2002:: 32
timer spf
Use timer spf to set the SPF calculation interval.
Use undo timer spf to restore the default.
Syntax
timer spf maximum-interval [ minimum-interval [ incremental-interval ] ]
undo timer spf
Default
The maximum interval is 5 seconds, the minimum interval is 50 milliseconds, and the incremental interval
is 200 milliseconds.
Views
IS-IS IPv6 unicast address family view
Predefined user roles
network-admin
Parameters
maximum-interval: Specifies the maximum SPF calculation interval in the range of 1 to 120 seconds.
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 an SPT with itself being the root.
The router uses the SPT 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 infrequent, the minimum-interval is adopted. If network changes become
frequent, the SPF calculation interval is incremented by the incremental-interval for each calculation until
the maximum-interval is reached.