Before You Begin - ZyXEL Communications PMG5317-T20A User Manual

Figure 20 IPv6 Rapid Deployment
LAN
- IPv6
- IPv4
+
IPv6 IPv4
Dual Stack Lite
Use Dual Stack Lite when local network computers use IPv4 and the ISP has an IPv6 network.
When the GPON Device has an IPv6 WAN address and you set IPv4/IPv6 Mode to IPv6 Only,
you can enable Dual Stack Lite to use IPv4 computers and services.
The GPON Device 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 GPON Device uses it's configured IPv6 WAN IP to route IPv6 traffic
to the IPv6 Internet.
Figure 21 Dual Stack Lite
LAN
- IPv6
- IPv4
+
IPv6 IPv4

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.
Chapter 6 Broadband
WAN
- IPv4
- IPv6 in IPv4
ISP (IPv4)
IPv6 in IPv4
IPv4
IPv4 Internet
WAN
- IPv6
- IPv4 in IPv6
ISP (IPv6)
IPv6
IPv4 in IPv6
AFTR
IPv4 Internet
PMG5317-T20A User's Guide
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BR
IPv6 Internet
IPv6 Internet