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Usage guidelines
If multiple dynamic routing protocols find routes to the same destination, the route found by the protocol
with the highest preference is selected as the optimal route.
Examples
# Configure the preference for IPv6 IS-IS as 20.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] ipv6 preference 20
ipv6 priority
Use ipv6 priority to assign a convergence priority to specific IPv6 IS-IS routes.
Use undo ipv6 priority to remove the configuration.
Syntax
ipv6 priority { critical | high | medium } { prefix-list prefix-list-name | tag tag-value }
undo ipv6 priority { critical | high | medium } [ prefix-list | tag ]
Default
IPv6 IS-IS routes have the low convergence priority.
Views
IS-IS view
Predefined user roles
network-admin
Parameters
critical: Specifies the highest convergence priority.
high: Specifies the high convergence priority.
medium: Specifies the medium convergence priority.
prefix-list prefix-list-name: Specifies an IPv6 prefix list by its name, a case-sensitive string of 1 to 63
characters.
tag tag-value: Specifies a tag value in the range of 1 to 4294967295.
Usage guidelines
The higher the convergence priority, the faster the convergence speed.
IPv6 IS-IS host routes have a medium convergence priority.
Examples
# Assign the high convergence priority to IS-IS routes permitted by IPv6 prefix list standtest.
<Sysname> system-view
[Sysname] isis 1
[Sysname-isis-1] ipv6 priority high prefix-list standtest
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