ipv6 nd ra halt

Function

The ipv6 nd ra halt command suppresses a router from sending Router Advertisement (RA) messages.

The undo ipv6 nd ra halt command enables a router to send RA messages.

By default, a router is suppressed from sending RA messages.

Format

ipv6 nd ra halt

undo ipv6 nd ra halt

Parameters

None

Views

Ethernet interface view, Eth-Trunk interface view, Tunnel interface view, VLANIF interface view, BDIF interface view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

When a routing device is connected to a host, the router device has to periodically advertise its IP address, prefix, and other parameters in RA messages to the host. Upon receipt, the host can update configurations. After the undo ipv6 nd ra halt command on the routing device, the device can periodically send RA messages to multicast address (FF02::1) of all nodes.
When one router is connected to another and there is no host in the network, the function to send RA messages does not need to be enabled, and You are then recommended to use the default mode of the command.

Prerequisites

Before the function to suppress a device from sending RA messages is configured using the ipv6 nd ra halt command, run the ipv6 enable command in the interface view to enable the IPv6 function on the interface.

Configuration Impact

After the ipv6 nd ra halt command is run to suppress a router from sending RA messages, the router will not send RA messages. In such a case, a host in the network will not receive information about updated IPv6 prefixes periodically.

Precautions

The ipv6 nd ra halt command only prevents the device from periodically sending RA messages. The device can send RA messages in response to requests sent by IPv6 nodes along local links.

Example

# Suppress a device from advertising messages on the GE interface.

<sysname> system-view

[sysname] interface GigabitEthernet 0/0/0

[sysname-GigabitEthernet0/0/0] ipv6 enable

[sysname-GigabitEthernet0/0/0] ipv6 nd ra halt