Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
75
Above
is
the
general
case
for
3
Ethernet
LAN
ports
in
the
gateway.
But
if
the
device
just
has
one
Ethernet
LAN
port,
there
will
be
only
one
VLAN
group
for
the
device.
Under
such
situation,
it
still
supports
both
the
NAT
and
Bridge
mode
for
the
Port
‐
based
VLAN
configuration.
Tag
‐
based
VLAN
Tagging
for
Location
‐
free
Departments
Tag
‐
based
VLAN
function
can
group
Ethernet
ports,
Port
‐
1
~
Port
‐
4,
and
WiFi
Virtual
Access
Points,
VAP
‐
1
~
VAP
‐
8,
together
with
different
VLAN
tags
for
deploying
department
subnets
in
Intranet.
All
packet
flows
can
carry
with
different
VLAN
tags
even
at
the
same
physical
Ethernet
port
for
Intranet.
These
flows
can
be
directed
to
different
destination
because
they
have
differentiated
tags.
The
approach
is
very
useful
to
group
some
hosts
at
different
geographic
location
to
be
in
the
same
department.