Huawei S6700 Series

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.
l If incr-interval is not specified, the delay in SPF calculation for the first time is determined
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.
l When only max-interval is specified, the intelligent timer functions as an ordinary one-time
triggering timer.
----End
6.8.5 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 S6700 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
The system view is displayed.
Step 2 Run:
isis [ process-id ]
The IS-IS view is displayed.
Step 3 Run:
prefix-priority [ level-1 | level-2 ] { critical | high | medium } { ip-prefix
prefix-name | tag tag-value }
Convergence priorities are set for IS-IS routes.
The application rules of the convergence priorities for IS-IS routes are as follows:
l Existing IS-IS routes are converged based on the priorities configured in the prefix-
priority command.
l New IS-IS routes are converged based on the priorities configured in the prefix-priority
command.
l If an IS-IS route conforms to the matching rules of multiple convergence priorities, the
highest convergence priority is used.
l The convergence priority of a Level-1 IS-IS route is higher than that of a Level-2 IS-IS route.
l If the route level is not specified, the configuration of the prefix-priority command takes
effect for both Level-1 and Level-2 IS-IS routes.
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 6 IS-IS Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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