Moxa DA-820-C8-DP-HV [2/2] Configuring the ethernet interface
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Moxa DA-820-C8-DP-HV [2/2] Configuring the ethernet interface

Moxa DA-820-C8-DP-HV [2/2] Configuring the ethernet interface
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Serial Ports
The DA-820 comes with 2 software-selectable RS-232/422/485
serial ports on the rear panel. The ports use DB9 male connectors.
Refer to the following table for pin assignments.
Pin
RS-232
RS-422
RS-485
(4-wire)
1
DCD
TxDA(-)
TxDA(-)
2
RxD
TxDB(+)
TxDB(+)
3
TxD
RxDB(+)
RxDB(+)
4
DTR
RxDA(-)
RxDA(-)
5
GND
GND
GND
6
DSR
–
–
7
RTS
–
–
8
CTS
–
–
Ethernet Ports
The DA-820 has 4 100/1000 Mbps RJ45 Ethernet ports. Refer to
the following table for pin assignments.
Pin
100 Mbps
1000 Mbps
1
Tx+
TRD(0)+
2
Tx-
TRD(0)-
3
Rx+
TRD(1)+
4
–
TRD(2)+
5
–
TRD(2)-
6
Rx-
TRD(1)-
7
–
TRD(3)+
8
–
TRD(3)-
The default IP addresses and netmasks of the Ethernet ports are
shown below. Note that W7E models default to DHCP.
Default IP Address
Netmask
LAN 1
192.168.3.127
255.255.255.0
LAN 2
192.168.4.127
255.255.255.0
LAN 3
192.168.5.127
255.255.255.0
LAN 4
192.168.6.127
255.255.255.0
Installing Removable Storage
The DA-820 has 4 hot-swappable 2.5” SSD/HDD storage trays
located on the front panel for installing additional storage drives.
Remove the screws on the trays to install the SSD/HDD storage
drives. RAID 0, 1, 5, and 10 are supported.
Configuring the Ethernet Interface
Linux users should follow these steps:
If you use the console cable to configure network settings for the
first time, use the following commands to edit the interfaces file.
First, make sure all network interfaces are offline before you
reconfigure the LAN settings:
MOXA:~#
ifdown –a
Next, edit the network interfaces file; you may use a text editor of
your choice, but vi is the default editor on the DA-820-LX:
MOXA:~#vi /etc/network/interfaces
You may set the DA-820 for either dynamic IP addressing or static
IP addressing. For dynamic IP addressing, enter the following lines
into the network interfaces file:
# The primary network interface
auto eth0
iface eth0 inet dhcp
To configure an interface for static IP addressing, use the following
configuration. Each interface must be configured with separate
entries in the network/interfaces file; LAN1 corresponds to eth0,
LAN 2 corresponds to eth1, and so on for the remaining interfaces.
# The loopback network interface
auto lo
iface lo inet loopback
# The first LAN interface, LAN 1
auto eth0
iface eth0 inet static
address 192.168.3.127
netmask 255.255.255.0
broadcast 192.168.3.255
# The second LAN interface, LAN 2
auto eth1
iface eth1 inet static
address 192.168.4.127
netmask 255.255.255.0
broadcast 192.168.4.255
Exit vi by typing:
:wq
After the interfaces file has been configured, use the following
commands to reinitialize the network interfaces and activate the
new settings immediately:
MOXA:~#sync; ifup –a
Win7 users should follow these steps:
Step 1:
Go to Start Control Panel Network and Internet
Network Connections.
Step 2:
On the Local Area Connection Properties screen, click
Internet Protocol (TCP/IP) and select Properties.
Step 3:
Click OK after inputting the preferred IP address and
netmask.

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