ipv6 nd ra prefix

Use ipv6 nd ra prefix to configure the prefix information in RA messages.

Use undo ipv6 nd ra prefix to restore the default.

Syntax

ipv6 nd ra prefix { ipv6-prefix prefix-length | ipv6-prefix/prefix-length } [ valid-lifetime preferred-lifetime [ no-autoconfig | off-link ] * | no-advertise ]

undo ipv6 nd ra prefix { ipv6-prefix | ipv6-prefix/prefix-length }

Default

No prefix information is configured for RA messages. Instead, the IPv6 address of the interface sending RA messages is used as the prefix information.

If the IPv6 address is manually configured, the prefix uses the fixed valid lifetime 2592000 seconds (30 days) and preferred lifetime 604800 seconds (7 days).

If the IPv6 address is automatically obtained (through DHCP, for example), the prefix uses the valid and preferred lifetime of the IPv6 address.

Views

Interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ipv6-prefix: Specifies the IPv6 prefix.

prefix-length: Specifies the prefix length of the IPv6 address.

valid-lifetime: Specifies the valid lifetime of a prefix, in the range of 0 to 4294967295 seconds. The default value is 2592000 seconds (30 days).

preferred-lifetime: Specifies the preferred lifetime of a prefix used for stateless autoconfiguration, in the range of 0 to 4294967295 seconds. The preferred lifetime cannot be longer than the valid lifetime. The default value is 604800 seconds (7 days).

no-autoconfig: Specifies a prefix not to be used for stateless autoconfiguration. If you do not specify this keyword, the prefix is used for stateless autoconfiguration.

off-link: Indicates that the address with the prefix is not directly reachable on the link. If you do not specify this keyword, the address with the prefix is directly reachable on the link.

no-advertise: Disables the device from advertising the prefix specified in this command. If you do not specify this keyword, the device advertises the prefix specified in this command.

Usage guidelines

After hosts on the same link receive RA messages, they can use the prefix information in the RA messages for stateless autoconfiguration.

A prefix specified without a parameter in this command preferentially uses the default settings configured by using the ipv6 nd ra prefix default command. If the default settings are unavailable, the prefix uses the following settings:

Examples

# Configure the prefix information in RA messages on VLAN-interface 100.

Method 1:

<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] ipv6 nd ra prefix 2001:10::100/64 100 10

Method 2:

<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] ipv6 nd ra prefix 2001:10::100 64 100 10