R21xx-HP FlexFabric 11900 Layer 3 IP Services Command Reference

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Default
The number of attempts to send an NS message for DAD is 1.
Views
Interface view
Predefined user roles
network-admin
Parameters
value: Specifies the number of attempts to send an NS message for DAD, in the range of 0 to 600. If it
is set to 0, DAD is disabled.
Usage guidelines
An interface sends an NS message for DAD after obtaining an IPv6 address.
If the interface does not receive a response within a specific time (set by the ipv6 nd ns retrans-timer
command), it continues to send an NS message.
If the interface still does not receive a response after the number of attempts reaches the threshold (set by
the ipv6 nd dad attempts command), the obtained address is considered usable.
Examples
# Set the number of attempts to send an NS message for DAD to 20.
<Sysname> system-view
[Sysname] interface vlan-interface 100
[Sysname-Vlan-interface100] ipv6 nd dad attempts 20
Related commands
• display ipv6 interface
• ipv6 nd ns retrans-timer
ipv6 nd ns retrans-timer
Use ipv6 nd ns retrans-timer to set the interval for retransmitting an NS message.
Use undo ipv6 nd ns retrans-timer to restore the default.
Syntax
ipv6 nd ns retrans-timer value
undo ipv6 nd ns retrans-timer
Default
The local interface sends NS messages at an interval of 1000 milliseconds, and the Retrans Timer field
in the RA messages sent is 0, so that the interval for retransmitting an NS message is determined by the
receiving device.
Views
Interface view