ZyXEL P-660HW-67 User Guide - Page 346

Con d Tunnel, 6to4 Tunnel

Page 346 highlights

Appendix E IPv6 On the ZyXEL Device, you can either set up a configured tunnel or an automatic 6to4 tunnel. The following describes each method. Configured Tunnel A configured tunnel is a point-to-point tunnelling mechanism that encapsulates an IPv6 address with an IPv4 address. Routers (A and B) on both IPv6 networks (1 and 2) each must have an interface that connects to the IPv4 network (with an IPv4 address). This allows the router to send and receive IPv6 data over the IPv4 network. In this case, you must specify B's public IPv4 address on A (similarly, specify A's public IPv4 address on B) in order for packets to arrive at the intended destination through the IPv4 network. Figure 215 Configured Tunnel Example 6to4 Tunnel A 6to4 tunnel is an automatic tunnelling mechanism that provides connection between IPv6 networks across an IPv4 network. To transmit IPv6 packets over an IPv4 network, the IPv6 packets are encapsulated inside IPv4 packets. The following figure shows a network example. Figure 216 6to4 Relay Router Network Example In a 6to4 tunnel, 6to4 routers (A and B in the example network) forward these packets between IPv6 networks (1 and 2) over the IPv4 Internet. A 6to4 relay router (C) connects to both an IPv6 and IPv4 network. A 6to4 relay router is used to forward packets between 6to4 routers in an IPv4 Internet and an IPv6 device (Z) on the IPv6 Internet. To transmit packets, a 6to4 address is used with a special IPv6 prefix of 2002:: to encode a given IPv4 address. A 6to4 address has the following format: 2002:IPv4 address:subnet ID:host ID/64 346 ADSL Router Series User's Guide

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Appendix E IPv6
ADSL Router Series User’s Guide
346
On the ZyXEL Device, you can either set up a configured tunnel or an automatic 6to4 tunnel. The
following describes each method.
Configured Tunnel
A configured tunnel is a point-to-point tunnelling mechanism that encapsulates an IPv6 address
with an IPv4 address. Routers (
A
and
B
) on both IPv6 networks (
1
and
2
) each must have an
interface that connects to the IPv4 network (with an IPv4 address). This allows the router to send
and receive IPv6 data over the IPv4 network.
In this case, you must specify
B
’s public IPv4 address on
A
(similarly, specify
A
’s public IPv4
address on
B
) in order for packets to arrive at the intended destination through the IPv4 network.
Figure 215
Configured Tunnel Example
6to4 Tunnel
A 6to4 tunnel is an automatic tunnelling mechanism that provides connection between IPv6
networks across an IPv4 network. To transmit IPv6 packets over an IPv4 network, the IPv6 packets
are encapsulated inside IPv4 packets.
The following figure shows a network example.
Figure 216
6to4 Relay Router Network Example
In a 6to4 tunnel, 6to4 routers (
A
and
B
in the example network) forward these packets between
IPv6 networks (
1
and
2
) over the IPv4 Internet. A 6to4 relay router (
C
) connects to both an IPv6
and IPv4 network. A 6to4 relay router is used to forward packets between 6to4 routers in an IPv4
Internet and an IPv6 device (
Z
) on the IPv6 Internet.
To transmit packets, a 6to4 address is used with a special IPv6 prefix of
2002::
to encode a given
IPv4 address. A 6to4 address has the following format:
2002:IPv4 address:subnet ID:host ID/64