Context
By default, the convergence priority of 128-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
The system view is displayed.
Step 2
Run:
isis
[
process-id
]
The IS-IS view is displayed.
Step 3
Run:
ipv6 prefix-priority
[
level-1
|
level-2
] {
critical
|
high
|
medium
} {
ipv6-
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
ipv6 prefix-
priority
command.
l
New IS-IS routes are converged based on the priorities configured in the
ipv6 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.
NOTE
The
ipv6 prefix-priority
command is only applicable to the public network.
After the
ipv6 prefix-priority
command is run, the convergence priority of 32-bit host routes is
low
, and
the convergence priorities of the other routes are determined as specified in the
ipv6 prefix-priority
command.
Step 4
(Optional) Run:
quit
The system view is displayed.
Step 5
(Optional) Run:
ipv6 route prefix-priority-scheduler
critical-weight
high-weight
medium-weight
low-
weight
The preference-based scheduling ratio of IPv6 routes is configured.
HUAWEI NetEngine80E/40E Router
Configuration Guide - IP Routing
7 IS-IS Configuration
Issue 02 (2014-09-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
614
