ipv6 nd ra
Function
The ipv6 nd ra command sets the interval for sending Router Advertisement packets.
The undo ipv6 nd ra command restores the interval for sending RA packets to the default value.
By default, the maximum interval is 600s and the minimum interval is 200s.
If min-interval is not specified, the minimum interval varies depending on the maximum interval specified by max-interval (the minimum is 1/3 of the maximum). If min-interval is specified, the minimum interval is the value configured.
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 sending RA packets. | The value is an integer that ranges from 4 to 1800, in seconds. The default value is 600 seconds, which is recommended. The maximum interval cannot be less than the minimum interval. |
| min-interval minimum-interval | Specifies the minimum interval for sending RA packets. | The value is an integer that ranges from 3 to 1350,
in seconds. The default value is 200 seconds, which is recommended. |
Usage Guidelines
Usage Scenario
A routing device periodically sends RA packets. An RA packet carries both the IPv6 address prefix and the flag of stateful address autoconfiguration.
You can run the ipv6 nd ra command to change the interval for sending RA packets. To reduce the number of RA messages being transmitted on a link, you can set a longer interval. To speed up router discovery, you can set a shorter interval.
Prerequisites
The IPv6 function has been enabled on the interface using the ipv6 enable command in the interface view.
Precautions
Running the ipv6 nd ra command changes the interval for sending RA packets during DAD. Therefore, you are advised to use the default interval, that is, the maximum value is 600s and the minimum value is 200s.
If the ipv6 nd ra command is run multiple times, the latest configuration takes effect.
The interval for sending RA packets cannot be longer than the lifetime of the RA packets. The default lifetime of the RA packets is 1800s and, you can run the ipv6 nd ra router-lifetime command to change the value.
The actual interval for sending RA packets is a random value between min-interval and max-interval.
Example
# Set the maximum interval for sending RA packets to 1000s on VLANIF100.
<HUAWEI> system-view [HUAWEI] ipv6 [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] ipv6 enable [HUAWEI-Vlanif100] ipv6 nd ra max-interval 1000
# Set the maximum interval for sending RA packets to 1000s on GE0/0/1.
<HUAWEI> system-view [HUAWEI] ipv6 [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo portswitch [HUAWEI-GigabitEthernet0/0/1] ipv6 enable [HUAWEI-GigabitEthernet0/0/1] ipv6 nd ra max-interval 1000
# Set the minimum interval for sending RA packets to 300s on VLANIF100.
<HUAWEI> system-view [HUAWEI] ipv6 [HUAWEI] interface vlanif 100 [HUAWEI-Vlanif100] ipv6 enable [HUAWEI-Vlanif100] ipv6 nd ra min-interval 300
# Set the minimum interval for sending RA packets to 300s on GE0/0/1.
<HUAWEI> system-view [HUAWEI] ipv6 [HUAWEI] interface gigabitethernet 0/0/1 [HUAWEI-GigabitEthernet0/0/1] undo portswitch [HUAWEI-GigabitEthernet0/0/1] ipv6 enable [HUAWEI-GigabitEthernet0/0/1] ipv6 nd ra min-interval 300