Configuration Guide      IPv6 Configuration 
ipv6 nd reachable-time milliseconds 
(Optional)  Define  the  time  when  the  neighbor  is 
considered to be reachable. 
Note: as specified in RFC4861, the reachable time 
of a neighbor should be increased or decreased at 
random on the basis of the configured time in the 
range of 0.5 to 1.5 of the configured time. 
ipv6 nd prefix ipv6-prefix/prefix-length | 
default [[valid-lifetime preferred-lifetime] 
| [at valid-date preferred-date] | infinite | 
no-advertise]] 
(Optional) Set the address prefix to be advertised in 
the router advertisement (RA) message. 
ipv6 nd ra-lifetime seconds 
(Optional)  Set  the  TTL  of  the  router  in  the  router 
advertisement (RA) message, namely the time as 
the default router. 0, indicates that the router will not 
act  as  the  default  router  of  the  direct-connected 
network. 
ipv6 nd ra-interval seconds 
(Optional)  Set  the  time  interval  for  the  router  to 
send  the  router  advertisement  (RA)  message 
periodically. 
ipv6 nd managed-config-flag 
(Optional) Set the “managed address configuration” 
flag bit of the router advertisement (RA) message, 
and determine whether the host will use the stateful 
auto-configuration  to  obtain  the  address  when  it 
receives this router advertisement (RA). 
ipv6 nd other-config-flag 
(Optional) Set the “other stateful configuration” flag 
bit of the router advertisement (RA) message, and 
determine  whether  the  host  will  use  the  stateful 
auto-configuration to obtain other information other 
than  the  address  when  it  receives  this  router 
advertisement (RA). 
(Optional)  Set  whether  suppress  the  router 
advertisement (RA) message in this interface. 
Return to the privileged EXEC mode. 
show  ipv6  interface  [interface-id] 
[ra-info] 
Show  the  ipv6  interface  of  the  interface  or  the 
information of RA sent by this interface.