Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
124
Scenario
Application
Timing
When
the
administrator
of
the
gateway
wants
to
specify
what
kinds
of
packets
to
be
transferred
via
which
one
gateway
interface
and
which
peer
gateway
to
their
destination.
It
can
be
carried
out
by
the
"Static
Routing"
feature.
Scenario
Description
Dedicated
packet
flows
from
the
Intranet
will
be
routed
to
their
destination
via
the
pre
‐
defined
peer
gateway
and
corresponding
gateway
interface
that
are
defined
in
the
system
routing
table
by
manual.
Parameter
Setup
Example
Following
tables
list
the
parameter
configuration
as
an
example
for
the
gateway
in
above
diagram
with
"Static
Routing"
enabling.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
tables.
Configuration Path
[Static Routing]-[Configuration]
Static Routing
■
Enable
Configuration Path
[Static Routing]-[Static Routing Rule List]
ID
1
2
Destination IP
173.194.72.94 188.125.73.108
Subnet Mask
255.255.255.255 255.255.255.255
Gateway
118.18.81.1 203.95.80.1
Metric
255 255
Rule
■
Enable
■
Enable
Scenario
Operation
Procedure
In
above
diagram,
the
Gateway
is
the
gateway
of
Network
‐
A
and
the
subnet
of
its
Intranet
is
10.0.75.0/24.
The
gateway
has
the
IP
address
of
10.0.75.2
for
LAN
interface,
118.18.81.33
for
WAN
‐
1
interface
and
203.95.80.22
for
WAN
‐
2
interface.
It
serves
as
a
NAT
router.
Configure
two
static
routing
rules
for
the
gateway.
The
first
one
is
to
define
the
packets
from
the
Intranet
to
the
web
site
(173.194.72.94)
will
be
routed
via
the
WAN
‐
1
interface
and
the
ADSL
ISP's
gateway.
The
second
one
is
to
define
the
packets
to
the
Yahoo
web
site
(188.125.73.108)
will
be
routed
via
the
WAN
‐
2
interface
and
the
Cellular
Network
ISP's
gateway.
System
will
route
the
packets
from
the
Intranet
to
site
and
Yahoo
site
based
on
above
settings.
