PoE
AP
Router
94
In
above
diagram,
the
6to4
means
no
need
to
set
gateway
address
"automatic"
tunneling
solution.
The
automatic
mean
have
relay
server,
as
defined
in
RFC
3068
has
included
segments
draw
192.88.99.0/24
used
as
6to4
relay
of
any
‐
cast
address
to
complete
6in4
setting.
6in4
6in4
is
an
Internet
transition
mechanism
for
Internet
IPv4
to
IPv6
migration.
6in4
uses
tunneling
to
encapsulate
IPv6
traffic
over
explicitly
‐
configured
IPv4
links.
As
defined
in
RFC
4213,
the
6in4
traffic
is
sent
over
the
IPv4
Internet
inside
IPv4
packets
whose
IP
headers
have
the
IP
protocol
number
set
to
41.
This
protocol
number
is
specifically
designated
for
IPv6
encapsulation.
In
above
diagram,
the
6in4
usually
needs
to
register
to
a
6in4
tunnel
service,
known
as
Tunnel
Broker,
in
order
to
use.
It
also
need
end
point
global
IPv4
address
as
114.39.16.49
to
complete
6in4
setting.
