Figure 3-4 Working Principle Of Ipv6 Over Ipv4 Tunnel - Zte ZXR10 ZSR V2 Series Product Description

Figure 3-4 Working principle of IPv6 over IPv4 tunnel

IPv6 over IPv4 tunnel can be established on host-host, host-device, device-host, and
device-device. The terminal of the tunnel could be the final destination of IPv6 packet, or
could be further forwarded. Based on different ways to obtain IPv4 address for terminal
of the tunnel, the tunnel is divided into 'configured tunnel' and 'automatic tunnel'.

If the terminal address of IPv6 over IPv4 tunnel cannot be automatically obtained
from the destination address of IPv6 packet, it should be manually configured. This
is 'configured tunnel' such as 6in4 and GRE.

If the interface address of IPv6 over IPv4 tunnel uses special IPv6 address with
embedded IPv4 address, IPv4 address of tunnel terminal can be automatically
obtained from the destination address of IPv6 packet. This is 'automatic tunnel' such
as 6to4 and ISATAP.
3.9.4.2 IPv4 over IPv6 Tunnel
IPv4 or IPv6 over IPv6 tunnel (RFC2473) protocol encapsulates IPv4 or IPv6 data
packets to enable them to be transmitted in another IPv6 network. The encapsulated
data packets are IPv6 tunnel packets as shown in Figure:
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ZXR10 ZSR V2 Series Router Product Description
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