ipv6 nd ra

Function

The ipv6 nd ra command sets the interval for sending RA messages.

The undo ipv6 nd ra command restores the default setting.

By default, The maximum interval is 600s. For the minimum interval, if the maximum interval for advertising RA packets is 9s or greater, it is 1/3 of the maximum interval. In other cases, the default minimum interval is the same as the maximum interval for advertising RA packets.

Format

ipv6 nd ra { max-interval maximum-interval | min-interval minimum-interval }

undo ipv6 nd ra { max-interval | min-interval }

Parameters

Parameter	Description	Value
max-interval maximum-interval	Specifies the maximum interval for the device to advertise RA messages.	The value is an integer ranging from 4 to 1800, in seconds. The maximum interval cannot be shorter than 4/3 of the minimum interval.
min-interval minimum-interval	Specifies the minimum interval for the device to send RA messages.	The value is an integer ranging from 3 to 1350, in seconds.

Parameter

Description

Value

max-interval maximum-interval

Specifies the maximum interval for the device to advertise RA messages.

The value is an integer ranging from 4 to 1800, in seconds. The maximum interval cannot be shorter than 4/3 of the minimum interval.

min-interval minimum-interval

Specifies the minimum interval for the device to send RA messages.

The value is an integer ranging from 3 to 1350, in seconds.

Views

100ge sub-interface view, 100GE interface view, 10GE sub-interface view, 10GE interface view, 200GE sub-interface view, 25GE sub-interface view, 25GE interface view, 400GE sub-interface view, 400GE interface view, 40GE sub-interface view, 40GE interface view, 50GE sub-interface view, 50GE interface view, Eth-Trunk sub-interface view, Eth-Trunk interface view, FlexE interface view, GE optical interface view, GE sub-interface view, GE interface view, GE electrical interface view, Global VE sub-interface view, PW-VE sub-interface view, PW-VE interface view, VBDIF interface view, VE sub-interface view, VLANIF interface view, Management interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
nd	write

Usage Guidelines

Usage Scenario

A Router periodically sends RA messages. An RA message carries both the IP address prefix and the flag of stateful address autoconfiguration.

You can run the ipv6 nd ra command to change the interval for sending RA messages.

Prerequisites

Before running the ipv6 nd ra command to set the interval for sending RA messages, you need to run the ipv6 enable command in the interface view to enable the IPv6 function on the interface.

Configuration Impact

Running the ipv6 nd ra command will change the number of NS messages that are sent when DAD is performed. Therefore, you are recommended to use the default interval.

The ipv6 nd ra command is circular in nature. That is, if the intervals set two times are different, the latest setting takes effect.

Precautions

Commonly, the interval for sending RA messages must be shorter than or equal to lifetime of the RA messages. You can run the ipv6 nd ra router-lifetime to change the lifetime of the RA messages.

The actual interval for sending RA messages is a random value between max-interval and min-interval.

Example

# Set the minimum interval for sending RA messages to 300 seconds.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/1
[~HUAWEI-GigabitEthernet0/1/1] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/1] ipv6 nd ra min-interval 300

# Set the maximum interval for sending RA messages to 1000 seconds.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet 0/1/1
[~HUAWEI-GigabitEthernet0/1/1] ipv6 enable
[*HUAWEI-GigabitEthernet0/1/1] ipv6 nd ra max-interval 1000