Billion BiPAC 8900X R3, User Manual

Page: 126 / 261

121
IPv4inIPv6
4in6 refers to tunneling of IPv4 in IPv6. It is an inherent internet interoperation mechanism allowing
IPv4 to be used in an IPv6 only network.
4in6 uses tunneling to encapsulate IPv4 traffic over configured IPv6 tunnels. 4in6 tunnels are usually
manually configured but they can be automated using protocols such as TSP(Tunnel Setup Protocol)
to allow easy connection to a tunnel broker.
DS – Lite
DS –Lite, or Dual-Stack Lite, is designed to let an ISP omit the deployment of any IPv4 address to
the customer’s CPE. Instead, only global IPv6 addresses are provided (Regular Dual-Stack Lite
deploys global addresses for both IPv4 and IPv6).
The CPE distributes private IPv4 addresses for the LAN clients, the same as a NAT device. The
subnet information is chosen by the customer, identically to the NAT model. However, instead of
performing the NAT itself, the CPE encapsulates the IPv4 packet inside an IPv6 packet.
Click Add button to manually add the 4in6 rules.
Tunnel Name: User-defined tunnel name.
Mechanism: It is the 4in6 tunnel operation technology. Please select DS-Lite.
Associated WAN Interface: The applied WAN interface with the set tunnel, and when there are
packets from/to the WAN interface, the tunnel would be used to transport the packets.
Associated LAN Interface: Specify the linked LAN interface with the tunnel.
Method: Manually to specify the AFTP (Address Family Transition Router) address or Automatic.
AFTR: Specify the address of AFTP (Address Family Transition Router) from your ISP.