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LAN Configuration
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ProSafe Wireless-N 8-Port Gigabit VPN Firewall FVS318N
Configure the IPv6 Router Advertisement Daemon and
Advertisement Prefixes for the LAN
Note: If you do not configure stateful DHCPv6 for the LAN but use
stateless DHCPv6, you need to configure the Router Advertisement
Deamon (RADVD) and advertisement prefixes.
The RADVD is an application that uses the Neighbor Discovery Protocol (NDP) to collect
link-local advertisements of IPv6 addresses and IPv6 prefixes in the LAN. The RADVD then
distributes this information in the LAN, which allows IPv6 clients to configure their own IPv6
address.
Hosts and routers in the LAN use NDP to determine the link-layer addresses and related
information of neighbors in the LAN that can forward packets on their behalf. The wireless
VPN firewall periodically distributes router advertisements (RAs) throughout the LAN to
provide such information to the hosts and routers in the LAN. RAs include IPv6 addresses,
types of prefixes, prefix addresses, prefix lifetimes, the maximum transmission unit (MTU),
and so on. In addition to configuring the RADVD, you also need to configure the prefixes that
are advertised in the LAN RAs.
The following table provides an overview of how information is obtained in the LAN when you
have configured a stateless DHCPv6 server and the RADVD:
When the Managed flag is set in the RADVD, the DHCPv6 server can assign IP addresses,
and the RADVD also assigns IP addresses in the sense that it provides information that
allows IPv6 clients to configure their own IPv6 address.
When the Other flag is set, the DHCPv6 server does not assign IP addresses but provides
DNS server and other configuration information only.
Table 15. DHCPv6 and RADVD interaction in the LAN
Flags in the RADVD DHCPv6 Server Provides RADVD Provides
Managed RA flag is set • IP address assignment
• DNS server and other configuration information
• IP address assignment
• Prefix
• Prefix length
• Gateway address
Other RA flag is set DNS server and other configuration information • IP address assignment
• Prefix
• Prefix length
• Gateway address