H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Configuration
H3C S7500E Series Ethernet Switches Chapter 1 IPv6 Basics Configuration
1-18
To do… Use the command… Remarks
Set the O flag bit to
1.
ipv6 nd autoconfig
other-flag
Optional
By default, the O flag bit is set to
0, that is, hosts acquire other
information through stateless
autoconfiguration.
Configure the router
lifetime in RA
messages
ipv6 nd ra
router-lifetime value
Optional
1,800 seconds by default.
Set the retrans timer
ipv6 nd ns
retrans-timer value
Optional
By default, the local interface
sends NS messages at intervals
of 1,000 milliseconds and the
Retrans Timer field in RA
messages sent by the local
interface is equal to 0.
Set the reachable
time
ipv6 nd nud
reachable-time value
Optional
By default, the neighbor
reachable time on the local
interface is 30,000 milliseconds
and the Reachable Timer field in
RA messages is 0.
Caution:
The maximum interval for sending RA messages should be less than or equal to the
router lifetime in RA messages.
1.4.4 Configuring the Number of Attempts to Send an NS Message for DAD
An interface sends a neighbor solicitation (NS) message for DAD after acquiring an
IPv6 address. If the interface does not receive a response within a specified time
(determined by the ipv6 nd ns retrans-timer command), it continues to send an NS
message. If it still does not receive a response after the number of attempts to send an
NS message reaches the maximum, the acquired address is considered available.
Follow these steps to configure the attempts to send an NS message for DAD:
To do… Use the command… Remarks
Enter system view
system-view
—
Enter interface view
interface interface-type
interface-number
—