3com S7906E Manuel De Montage

 

1-16 

Set the M flag bit to 1 

Optional 

By default, the M flag bit is set to 0, 
that is, hosts acquire IPv6 
addresses through stateless 
autoconfiguration. 

Set the O flag bit to 1 

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 

1800 seconds by default. 

Set the NS retransmission 
timer 

ipv6 nd ns retrans-timer 
value 

Optional 

By default, the local interface sends 
NS messages at an interval of 1000 
milliseconds, and the value of the 
Retrans Timer field in RA messages 
sent by the local interface is 0. 

Set the reachable time 

ipv6 nd nud 
reachable-time value 

Optional 

By default, the neighbor reachable 
time on the local interface is 30000 
milliseconds, and the value of the 
Reachable Timer field in RA 
messages is 0. 

 

z 

The maximum interval for sending RA messages should be less than or equal to the router lifetime 

in RA messages. 

z 

In VRRP networking, the source MAC address in an NA message is always different from that in 

the link layer address option at present, and therefore the consistency check on the MAC address 

of ND packets cannot be enabled. 

 

An interface sends a neighbor solicitation (NS) message for duplicate address detection 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 sent attempts reaches a configurable threshold, the acquired address is 

considered usable. 

Follow these steps to configure the attempts to send an NS message for DAD: 

Enter system view 

— 

Enter interface view 

interface interface-type 
interface-number 

—