Chapter 6 Broadband
SBG3500-N Series User’s Guide
104
Dual Stack Lite
Use Dual Stack Lite when local network computers use IPv4 and the ISP has an IPv6 network.
When the SBG3500-N Series has an IPv6 WAN address and you set IPv6/IPv4 Mode to IPv6
Only, you can enable Dual Stack Lite to use IPv4 computers and services.
The SBG3500-N Series tunnels IPv4 packets inside IPv6 encapsulation packets to the ISP’s Address
Family Transition Router (AFTR in the graphic) to connect to the IPv4 Internet. The local network
can also use IPv6 services. The VDSL Router uses it’s configured IPv6 WAN IP to route IPv6 traffic
to the IPv6 Internet.
Figure 21 Dual Stack Lite
6.1.3 Before You Begin
You need to know your Internet access settings such as encapsulation and WAN IP address. Get this
information from your ISP.
6.2 The Broadband Screen
Use this screen to change your SBG3500-N Series’s Internet access settings. Click Network
Setting > Broadband from the menu. The summary table shows you the configured WAN services
(connections) on the SBG3500-N Series.
Figure 22 Network Setting > Broadband
ISP (IPv6)
IPv6 Internet
IPv6
AFTR
IPv4 in IPv6
IPv4 Internet
IPv6
IPv4
+
LAN
- IPv6
- IPv4
WAN
- IPv6
- IPv4 in IPv6
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