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Table 20 Network > WAN > Internet Connection: IPoE Encapsulation (continued)
LABEL
DESCRIPTION
IPv6 Tunneling
Select None to not allow IPv6 packets to cross IPv4 networks.
Select 6RD to enable 6RD. IPv6 Rapid Deployment (6RD) is an IPv6 transitioning
process for stateless tunneling of IPv6 over IPv4. Enable 6RD to allow tunneling across
an ISP's IPv4 only access network.
Select 6to4 to transmit IPv6 packets over an IPv4 network. A 6to4 relay router is
required to route 6to4 packets to a native IPv6 network.
Select 6in4 if the NBG6617 has a public IPv4 address and you want to transmit your
IPv6 packets to one and only one remote site whose LAN network is also an IPv6
network. You must know the WAN IP address of the remote gateway.
6RD
The NBG6617 generates a global IPv6 prefix from its IPv4 WAN address and tunnels IPv6 traffic to the ISP's
Border Relay router to connect to the native IPv6 Internet. The local network can also use IPv4 services. The
NBG6617 uses its configured IPv4 WAN IP to route IPv4 traffic to the IPv4 Internet.
This is available only when you select IPv4 Only in the IPv4/IPv6 field.
Automatically
Select this to have the NBG6617 detect the relay server's IP address automatically
configured by
through DHCP.
DHCPC
Manually Configured Select this if you have the IPv4 address of the relay server.
Border Relay IPv4
Specify the relay server's IPv4 address.
Address
Service Provider
Enter an IPv6 prefix for tunneling IPv6 traffic to the ISP's Border Relay router and
IPv6 Prefix
connecting to the native IPv6 Internet.
Service Provider
Enter the IPv6 prefix length.
IPv6 Prefix length
An IPv6 prefix length specifies how many most significant bits (starting from the left) in
the address compose the network address.
IPv4 mask length
Enter the subnet mask number (1~32) for the IPv4 network.
6to4
The NBG6617 should get a public IPv4 address for the WAN. The NBG6617 adds an IPv4 IP header to an IPv6
packet when transmitting the packet to the Internet. In reverse, the NBG6617 removes the IPv4 header from
an IPv6 packet when receiving it from the Internet.
This is available only when you select IPv4 Only in the IPv4/IPv6 field.
Relay Server IPv4
Enter the IPv4 address of a 6to4 relay server which helps forward packets between
Address
6to4 networks and native IPv6 networks.
6in4
The NBG6617 encapsulates IPv6 packets within IPv4 packets across the Internet. You must know the WAN IP
address of the remote gateway device. This mode is normally used for a site-to-site application such as two
branch offices.
This is available only when you select IPv4 Only in the IPv4/IPv6 field.
Remote IPv4
Enter the IPv4 address of the remote gateway to which this interface tunnels traffic.
Address
Remote IPv6
Enter the IPv6 address of the remote gateway to which this interface tunnels traffic.
Address
Local IPv6 Address
Enter the IPv6 address assigned by your ISP.
IPv6 Prefix
Enter the IPv6 prefix for this interface if you want to use a static IP address.
Chapter 10 WAN
NBG6617 User's Guide
68
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