Chapter 6
Using Your GPIB-ENET/100 and NI-488.2
6-2
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90 seconds at power on. In this situation, you will need to obtain a static
IP address from your network administrator and configure the device
yourself using the
NI Ethernet Device Configuration
utility. Refer to the
section in Chapter 3,
for more information. Notice that if DHCP fails to assign you an address,
the current subnet might not have an address available for you to use. In this
case, you may have to move your product to another subnet where there is
an available IP address.
Failure also happens if communication between DHCP and DNS does not
occur. In this situation, DHCP assigns an address to the device, but you
cannot communicate to it using the hostname you assigned. Your network
administrator may have to manually insert the hostname into the DNS table.
Alternatively, you can use the
NI Ethernet Device Configuration
utility
to determine the hostname associated with your assigned IP address, and
change the hostname to match the DNS entry. Refer to the
section in Chapter 3,
, for more
information.
Because there are many other possible reasons for failure, contact your
network administrator if you are having problems getting DHCP to work.
When you can use DHCP and DNS successfully, you can use the hostname
form of the IP address to communicate with your product—even if the
numerical IP address changes with successive reboots.
If you are setting up a small network for your instrumentation system,
it is recommended to use static IP addresses, because they are easier to
implement and maintain. In this system, you can safely use the numerical
form of the IP address to communicate with your product because the
address is unlikely to change. Small networks are less likely to have domain
name services available that would resolve the hostname into a numerical
IP address.
Using the CFG RESET Switch
The Configuration Reset (CFG RESET) switch is a recessed switch located
beside the ENET connector on the rear panel. Refer to Figure 2-2,
, for an illustration of its location.
This switch performs two functions, depending on whether you press it
while switching the power on or during operation.
