Ipv6 Over Ipv4 Tunnel - Huawei S9300 Configuration Manual

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service
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IPv6 over IPv4 Tunnel

Figure 11-2
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Figure 11-2 Schematic diagram of IPv6 over IPv4 tunnel
IPv6 host
IPv6 Header IPv6 Data
The virtual tunnel that transmits IPv6 packets between the border devices is called the IPv6 over
IPv4 tunnel. Tunnels can be classified according to their setup modes.
The common IPv6 over IPv4 tunnel modes include:
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IPv6 over IPv4 Manual Tunnel
An IPv6 over IPv4 manual tunnel is set up by configuring the border devices of two tunnel ends.
The source IPv4 address and destination IPv4 address of such a tunnel must be configured
statically.
Issue 01 (2012-03-15)
Supported by multiple applications
Multiple applications such as DNS, FTP and Telnet support dual stacks. The upper
application, such as DNS, can select TCP or UDP as its transport layer protocol. However,
it prefers the IPv6 protocol stack rather than IPv4 to be the network layer protocol.
shows principles of the IPv6 over IPv4 tunnel technology.
Enabling IPv4/IPv6 dual stacks
Enable IPv4/IPv6 dual stacks on the border device.
Encapsulating IPv6 packets
After receiving a packet from the IPv6 network, the border device takes the received IPv6
packet as the payload, adds an IPv4 packet header before the payload and encapsulates it
into an IPv4 packet if it finds that the destination of the packet is not for itself.
Transmitting the encapsulated packet
In the IPv4 network, the encapsulated packet is transmitted to the peer border device.
Decapsulating the packet
The peer border device decapsulates the packet, removes the IPv4 packet header, and
forwards the resulting IPv6 packet to the remote IPv6 network.
Dual Stack
Router
IPv6
IPv4 Header
IPv6 over IPv4 manual tunnels
6to4 tunnels
Intrasite Automatic Tunnel Addressing Protocol (ISATAP) tunnels
6PE
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11 IPv6 over IPv4 Tunnel Configuration
Dual Stack
Router
IPv4
Tunnel
IPv6 Header IPv6 Data
IPv6
IPv6 host
IPv6 Header IPv6 Data
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