Unified Services Router    User Manual 
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  Prefix Address: IPv6 prefix address in the DHCPv6 server prefix pool 
  Prefix Length: Length prefix address 
2.1.2  Configuring IPv6 Router Advertisements 
Router Advertisements are analogous to IPv4 DHCP assignments for LAN clients, in 
that  the  router  will  assign  an  IP  address  and  supporting  network  information  to 
devices that are configured to accept such details. Router Advertisement is required 
in an IPv6 network is required for stateless auto configuration of the IPv6 LAN. By 
configuring the Router Advertisement Daemon on this router, the DSR will listen on 
the  LAN  for  router  solicitations  and  respond  to  these  LAN  hosts  with  router 
advisements. 
RADVD 
Advanced > IPv6 > IPv6 LAN > Router Advertisement 
To support stateless IPv6 auto configuration on the LAN, set the RADVD status to 
Enable. The following settings are used to configure RADVD: 
  Advertise Mode: Select Unsolicited Multicast to send router advertisements 
(RA‘s)  to  all  interfaces  in  the  multicast  group.  To  restrict  RA‘s  to  well 
known  IPv6  addresses  on  the  LAN,  and  thereby  reduce  overall  network 
traffic, select Unicast only.  
  Advertise  Interval:  When  advertisements  are  unsolicited  multicast  packets, 
this  interval  sets  the  maximum  time  between  advertisements  from  the 
interface.  The  actual  duration  between  advertisements  is  a  random  value 
between one third of this field and this field. The default is 30 seconds. 
  RA Flags: The router advertisements (RA‘s) can be sent  with one or both of 
these  flags.  Chose  Managed  to  use  the  administered  /stateful  protocol  for 
address  auto  configuration.  If  the  Other  flag  is  selected  the  host  uses 
administered/stateful protocol for non-address auto configuration. 
  Router  Preference:  this  low/medium/high  parameter  determines  the 
preference associated with the RADVD process of the router. This is useful 
if  there  are  other  RADVD  enabled  devices  on  the  LAN  as  it  helps  avoid 
conflicts for IPv6 clients. 
  MTU:  The  router  advertisement  will  set  this  maximum  transmission  unit 
(MTU) value for all nodes in the LAN that are autoconfigured by the router. 
The default is 1500. 
  Router Lifetime: This  value  is  present  in  RA‘s and  indicates  the  useful ness 
of  this  router  as  a  default  router  for  the  interface.  The  default  is  3600