Instructions
UM-0085-B09 DT80 Range User Manual Page 237
RG
Dhcp Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
IP Address. . . . . . . . . . . . : 192.168.11.44
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.11.250
DHCP Server . . . . . . . . . . . : 192.168.10.100
DNS Servers . . . . . . . . . . . : 192.168.10.100
192.168.10.111
. . .
In this case the subnet mask is 255.255.255.0, which indicates that the first three parts of the IP address (192.168.11)
identify the subnet, while the last part identifies an individual computer. IP addresses on this subnet can therefore range
from 192.168.11.1 through 192.168.11.254. If, on the other hand, the subnet mask was 255.255.0.0 then the subnet
number is given by the first two
parts of the address. Such a subnet could then contain IP addresses ranging from
192.168.1.1 through 192.168.254.254. If the subnet mask is something other than these then it becomes a little technical
and you should ask an IP expert.
You should also make a note of the Default Gateway address (192.168.11.250 in this case) and the DNS Server
addresses (192.168.10.100 and 192.168.10.111).
2. Select DT80 IP address
The IP address chosen for the DT80 must:
• have the correct subnet number, as determined above. In this example, the subnet number is 192.168.11.
• have a unique host number. So in this example the DT80 could not use the host number "44" (i.e. have an IP
address of 192.168.11.44), because that has already been taken by the host computer.
This is where it can get tricky. One method of finding a free address is to "ping" various IP addresses to see whether
there is any reply. Be aware that this is not
foolproof, but it may be adequate for a small network where you are aware of
all the devices that use it. The procedure is as follows:
a. Switch on all computers and devices that are connected to the network in question and allow them to boot up.
b. From the command prompt window, use the ping utility to test a candidate IP address, e.g.:
ping 192.168.11.10
c. If you see a Reply from 192.168.11.10… response then that address is not free and cannot be used for
the DT80.
d. If you see a Request timed out… response then the address can probably be used for the DT80.
3. Configure the DT80
You now have all the information you need and can proceed to configuring the DT80. Connect to the DT80 using a USB
or RS232 connection and enter the appropriate profile settings. For this example (assuming that IP address
192.168.11.10 passed the ping test) you would enter:
PROFILE ETHERNET ENABLE=YES
PROFILE ETHERNET IP_ADDRESS=192.168.11.10
PROFILE ETHERNET SUBNET_MASK=255.255.255.0
PROFILE ETHERNET GATEWAY=192.168.11.250
PROFILE NETWORK DNS_SERVER_1=192.168.10.100
PROFILE NETWORK DNS_SERVER_2=192.168.10.111
4. Check Ethernet port
Using the front panel UP and DOWN keys, select the Ethernet IP screen. It should show the configured IP address:
Eth IP: No cable
192.168.11.10
If this is not the case then the DT80's Ethernet port has not been properly configured, see Step 3 above.
5. Connect Ethernet cable
You can now connect a standard Ethernet cable between the DT80 and a network connection point. Verify that the green
Link LED comes on on the DT80's Ethernet connector. If the Link LED does not come on then check that:
• the cable is a correctly wired straight through cable
• the network access point is active (check with your network administrator)
6. Check DT80 IP address
When the Ethernet cable is connected, the No cable indication should disappear from the Ethernet IP screen:
Eth IP: Manual
192.168.11.10
If you have a DT81 then you can alternatively send the command:
IP
192.168.11.10