Chapter 3
Ethernet Configuration
©
National Instruments Corporation
3-7
Table 3-1 shows examples of valid and invalid IP addresses for a network
using subnet mask
255.255.255.0
. All valid IP addresses contain the
same first three numbers. The IP addresses in this table are for example
purposes only.
If you are setting up your own network, you probably do not have a
gateway or DNS server, so you should set these values to
0.0.0.0
.
Verifying the Hostname
The NI Ethernet Device Configuration utility automatically verifies that the
hostname for each DHCP-enabled device matches the DNS entry for the
assigned IP address. This verification process occurs when you either run
the utility or choose
<R>efresh List of Devices
from the main menu.
If any errors were detected during this process, an exclamation point (!)
appears to the left of the device that has a problem. To correct the problem
with the hostname, complete the following steps:
1.
Review the list of devices to determine which one displays an (
!
) next
to its IP address/hostname.
2.
Select the number that corresponds to the device to view its properties.
Table 3-1.
Valid and Invalid IP Addresses for Subnet Mask 255.255.255.0
IP Address
Comment
123.234.45.211
Valid.
123.234.45.213
Valid. The first three numbers match the previous
IP address. The fourth number must be a unique
number in the range of 1 to 254.
123.202.45.214
Invalid. Second number does not match the
previous IP addresses. The first three numbers
must match on all IP addresses with subnet mask
255.255.255.0
.
123.234.45.0
Invalid. The first three numbers are valid but the
fourth number cannot be 0.
123.234.45.255
Invalid. The first three numbers are valid but
the fourth number cannot be 255.
