User's Guide

Chapter 10 WAN
EMG3435-Q20A User’s Guide
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IPv6 Tunneling Select No ne 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 6to 4 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 EMG3435-Q20A 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 EMG3435-Q20A 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
EMG3435-Q20A uses its configured IPv4 WAN IP to route IPv4 traffic to the IPv4 Internet.
This is available only when you select IPv4 O nly in the IPv4/ IPv6 field.
Automatically
configured by
DHCPC
Select this to have the EMG3435-Q20A detect the relay server’s IP address automatically
through DHCP.
Manually Configured Select this if you have the IPv4 address of the relay server.
Border Relay IPv4
Address
Specify the relay server’s IPv4 address.
Service Provider IPv6
Prefix
Enter an IPv6 prefix for tunneling IPv6 traffic to the ISP’s Border Relay router and connecting
to the native IPv6 Internet.
Service Provider IPv6
Prefix length
Enter the 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 EMG3435-Q20A should get a public IPv4 address for the WAN. The EMG3435-Q20A adds an IPv4 IP header to
an IPv6 packet when transmitting the packet to the Internet. In reverse, the EMG3435-Q20A removes the IPv4
header from an IPv6 packet when receiving it from the Internet.
This is available only when you select IPv4 O nly in the IPv4/ IPv6 field.
Relay Server IPv4
Address
Enter the IPv4 address of a 6to4 relay server which helps forward packets between 6to4
networks and native IPv6 networks.
6in4
The EMG3435-Q20A 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 O nly in the IPv4/ IPv6 field.
Remote IPv4 Address Enter the IPv4 address of the remote gateway to which this interface tunnels traffic.
Remote IPv6 Address Enter the IPv6 address of the remote gateway to which this interface tunnels traffic.
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.
IPv6 DNS Server
This is available only when you select IPv4 O nly in the IPv4/ IPv6 field and set IPv6 Tunne ling to 6RD, 6in4 or 6to 4.
Table 19 Network > WAN > Internet Connection: IPoE Encapsulation (continued)
LABEL DESCRIPTIO N