ipv6 nd ns retrans-timer
Function
The ipv6 nd ns retrans-timer command sets a timer for route retransmission.
The undo ipv6 nd ns retrans-timer command restores the default.
By default, the retransmission interval is 1000 ms.
Parameters
| Parameter | Description | Value |
|---|---|---|
| interval | Specifies the retransmission interval. | It is an integer ranging from 1000 to 4294967295 milliseconds. |
Views
Ethernet interface view, Eth-Trunk interface view, Tunnel interface view, VLANIF interface view, BDIF interface view
Usage Guidelines
Usage Scenario
Setting an interval for sending NS messages helps to:
Control the interval at which a routing device detects neighbor reachability.
Control the interval at which a routing device performs DAD.
Instruct hosts to specify this interval as their own interval for sending NS messages.
Prerequisites
The ipv6 enable command has been run in the interface view to enable IPv6.
Configuration Impact
Frequently sending NS messages results in high CPU usage and affects system performance. Therefore, setting a short interval for sending NS messages is not recommended. The default interval (1000 ms) is recommended.
If the ipv6 nd ns retrans-timer command is run more than once, the latest configuration overrides the previous one.
Precautions
The interval for sending NS messages is the default value in the following cases:
- No interval is set for sending NS messages.
- The undo ipv6 nd ns retrans-timer command is run to restore the default interval for sending NS messages.
After a host receives an RA message of which the sending interval is 0 ms from a router, the host sets the interval for sending NS messages to 1000 ms, the same as that on the router.