RADWIN
5000
Configuration
Guide
Release
4.9.17
9
‐
2
QinQ
(Double
Tagging)
for
Service
Providers
VLAN
Functionality
Figure
9
‐
1:
VLAN
scenarios
handled
by
RADWIN
5000
HBS
IEEE
802.1Q
is
used
as
the
encapsulation
protocol
to
implement
this
mechanism
over
Ethernet
networks.
9.4.1
QinQ
(Double
Tagging)
for
Service
Providers
QinQ
is
useful
for
Service
Providers,
allowing
them
to
use
VLANs
internally
in
their
“transport
network”
while
mixing
Ethernet
traffic
from
clients
that
are
already
VLAN
‐
tagged.