Configuring Convergence Priorities For Ipv4 Is-Is Routes - Huawei Quidway NetEngine80E Configuration Manual

HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
isis [ process-id ]
The IS-IS view is displayed.
Step 3 Run:
timer spf max-interval [ init-interval [ incr-interval ] ]
The SPF intelligent timer is configured.
The intelligent timer changes as follows:
l The delay for the first SPF calculation is determined by init-interval; the delay for the second
l If incr-interval is not specified, the delay in SPF calculation for the first time is determined
l When only max-interval is specified, the intelligent timer functions as an ordinary one-time
Step 4 (Optional) Run:
spf-slice-size duration-time
The maximum duration for SPF calculation is configured.
----End

7.7.5 Configuring Convergence Priorities for IPv4 IS-IS Routes

If some IS-IS routes need to be converged by preference to minimize adverse impacts on services,
configure those routes to have the highest convergence priority.
Context
By default, the convergence priority of 32-bit host routes is medium, and the convergence
priority of the other IS-IS routes is low.
The NE80E/40E allows you to configure the highest convergence priority for specific IS-IS
routes so that those IS-IS routes will be converged first when a network topology changes.
Procedure
Step 1 Run:
system-view
Issue 02 (2014-09-30)
SPF calculation is determined by incr-interval. From the third time on, the delay in SPF
calculation increases twice every time until the delay reaches the value specified by max-
interval. After the delay remains at the value specified by max-interval for three times or the
IS-IS process is restarted, the delay decreases to the value specified by init-interval.
by init-interval. From the second time on, the delay in SPF calculation is determined by max-
interval. After the delay remains at the value specified by max-interval for three times or the
IS-IS process is restarted, the delay decreases to the value specified by init-interval.
triggering timer.
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