ZyXEL Communications PMG2006-T20A User Manual page 41

Chapter 6 Broadband
Figure 17 IPv6 Rapid Deployment
Dual Stack Lite
Use Dual Stack Lite when local network computers use IPv4 and the ISP has an IPv6 network. When the
PMG2006-T20A 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 PMG2006-T20A 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 PMG2006-T20A uses it's configured IPv6 WAN IP to route IPv6 traffic to the IPv6 Internet.
Figure 18 Dual Stack Lite
PMG2006-T20A User's Guide
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