Modbus
Cellular
Gateway
Index
skipping
is
used
to
reserve
slots
for
new
function
insertion,
when
required.
287
The
remote
NMS
with
privilege
IP
address
can
manage
the
devices,
but
other
remote
NMS
can't.
Parameter
Setup
Example
Following
tables
list
the
parameter
configuration
as
an
example
for
the
Gateway
1
in
above
diagram
with
"SNMP"
enabling
at
LAN
and
WAN
interfaces.
Use
default
value
for
those
parameters
that
are
not
mentioned
in
the
tables.
Configuration
Path
[SNMP]
‐
[Configuration]
SNMP
Enable
■
LAN
■
WAN
Supported
Versions
■
v1
■
v2c
■
v3
Get
/
Set
Community
ReadCommunity
/
WriteCommunity
Trap
Event
Receiver
1
118.18.81.11
WAN
Access
IP
Address
118.18.81.11
Configuration
Path
[SNMP]
‐
[User
Privacy
Definition]
ID
1
2
3
User
Name
UserName1
UserName2
UserName3
Password
Password1
Password2
Disable
Authentication
MD5
SHA
‐
1
Disable
Encryption
DES
Disable
Disable
Privacy
Mode
authPriv
authNoPriv
noAuthNoPriv
Privacy
Key
12345678
Disable
Disable
Authority
Read/Write
Read
Read
Enable
■
Enable
■
Enable
■
Enable
Scenario
Operation
Procedure
In
above
diagram,
the
NMS
server
can
manage
multiple
devices
in
the
Intranet
or
a
UDP
‐
reachable
network.
The
"Gateway
1"
is
one
of
the
managed
devices,
and
it
has
the
IP
address
of
10.0.75.2
for
LAN
interface
and
118.18.81.33
for
WAN
‐
1
interface.
It
serves
as
a
NAT
router.
At
first
stage,
the
NMS
manager
prepares
related
information
for
all
managed
devices
and
records
them
in
the
NMS
system.
Then
NMS
system
gets
the
status
of
all
managed
devices
by
using
SNMP
get
commands.
When
the
manager
wants
to
configure
the
managed
devices,
the
NMS
system
allows
him
to
do
that
by
using
SNMP
set
commands.
The
"UserName1"
account
is
used
if
the
manager
uses
SNMPv3
protocol
for
configuring
the
"Gateway
1".
Only
the
"UserName1"
account
can
let
the
"Gateway
1"
accept
the
configuration
from
the
NMS
since
the
authority
of
the
account
is
"Read/Write".
Once
a
managed
device
has
an
urgent
event
to
send,
the
device
will
issue
a
trap
to
the
Trap
Event
Receivers.
The
NMS
itself
could
be
one
among
them.
If
you
want
to
secure
the
transmitted
SNMP
commands
and
responses
between
the
NMS
and
the
managed
devices,
use
SNMPv3
version
of
protocol.
The
remote
NMS
without
privilege
IP
address
can't
manage
the
"Gateway
1",
since
"Gateway
1"
allows
only
the
NMS
with
privilege
IP
address
can
manage
it
via
its
WAN
interface.
