Chapter6 UsingYour GPIB-ENET/100 and NI-488.2
GPIB-ENET/100for Mac OS 6-2 ni.com
90 seconds at poweron. In this situatio n, you will need to obtain a static
IPaddress from your network adm inistrator and configure the device
yourselfusing th e NI Ethernet Device Configuration utility.Refer to the
Choosinga Static IP Address section in Chapter 3,Ethernet Configuration,
for more information. Notice that if DHCP fails to assign you an address,
thecurrent subnet might not have an address available for you to use. In this
case,you m ayhave to move your product to another subnet where there is
an availableIP address.
Failurealso happens if communication between DHCP and DNS does not
occur.In this situation, DHCP assigns an address to the device, but you
cannotc ommunicate to it using the hostname you assigned. Yournetwork
administratormay have to manually insert the hostname into the DNS table.
Alternatively,you can use the NI Ethernet Device Configuration utility
to determine thehostname associated with your assigned IP address, and
changethe hostname to match the DNS entry. Refer to the Verifying the
Hostname section in Chapter 3, Ethernet Configuration,formore
information.
Because there are manyother possible reasons for failure, contact your
networkadmi nistrator if you are havingproblems getting DH CP to work.
Whenyou can use DHCP and DNS successfully, you can use the hostname
form of the IP address to communicate with your product—even if the
numericalIP address changes with successive reboots.
If you are setting up a small network for your instrumentation system,
itis recommended to use static IP addresses, because they are easier to
implement and maintain. In this system, you can safely use the numerical
formof the IP address to communicate with your product because the
addressis unlikely to change. Small networks are less likely to have domain
name services availablethat would resolve the hostname into a num erical
IP address.
Using the CFG RESET Switch
TheConfiguration Reset (CFG RESET) switch is a recessed switch located
beside the ENET connector on the rear panel. Refer to Figure 2-2,
GPIB-ENET/100 Rear Panel, 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.