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Using DHCP
The Dynamic Host Configuration Protocol (DHCP) is designed for large
networks in which networking devices are transient and network
parameters cannot be statically assigned and thus tied to specific
devices. DHCP eases the addition of networking devices onto a network
by having a server assign necessary network parameters, including the
IP address, netmask, and router information, to a newly attached network
device. Optionally, if the device provides a hostname with the
configuration request, DHCP may attempt to configure your network to
recognize the device with the requested hostname.
DHCP requires a Domain Name Server (DNS) to associate the numerical
IP address assigned with the requested hostname. Within the past few
years, an Internet community standard has emerged to provide a
standardized way for these services to provide dynamic domain name
services. Using this standard, after DHCP assigns the numerical IP
address, it can communicate with DNS to register the newly assigned IP
address with the requested hostname. However, the complexity of DHCP
and dynamic name registration typically requires active management by
a corporate MIS department, or equivalent, because of several risks for
failure.
One possible failure can occur if the pool of available addresses contains
no more unassigned IP addresses. This problem is evident if DHCP fails
to work and the
PWR/RDY
LED continues to flicker for longer than 90
seconds at power on. In this situation, you need to obtain a static IP
address from your network administrator and configure the device
yourself using the NI Ethernet Device Configuration utility. 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 need 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 need to insert the hostname manually into the
DNS table. Alternately, 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
for more information.
Содержание ENET-232 Series
Страница 1: ......
Страница 5: ...Using Help Conventions Navigating Help Searching Help Printing Help File Topics ...
Страница 17: ...How to Use this Help File To use this help file refer to the following flow chart and the appropriate topics ...
Страница 21: ...Serial Hardware Overview PCI Kits PXI Kits USB Kits ENET Kits ExpressCard Kits PCMCIA Kits ...
Страница 24: ...PCI 485I RS 485 two port isolated RS 485 four port isolated ...
Страница 27: ...PXI 8423 RS 485 two port isolated RS 485 four port isolated ...
Страница 63: ...Save Pending Changes To save your changes to this item click Save ...
Страница 65: ...Restore Defaults To reset the fields to their default values at any time click the Defaults button ...
Страница 98: ...0 LPVOID l_SerialInterface sizeof l_SerialInterface LPDWORD l_ByteCount NULL ...
Страница 127: ...2 PORT LEDs USB Serial Hardware LEDs ...
Страница 139: ...Connecting the Cables to a Four Port PXI Serial Board ...
Страница 141: ...67 58 50 41 33 24 16 7 TXD 9 RI 9 ...
Страница 167: ......
Страница 169: ......
Страница 171: ......
Страница 181: ...How many serial ports can I have on my machine You can have up to 256 serial ports ...
Страница 189: ...nslookup hostname If you still cannot communicate with your device contact National Instruments ...
Страница 201: ...Glossary Prefixes Symbols A B C D E F G H I K L M P R S T U V ...
Страница 203: ...Symbols degrees ohms percent ...
Страница 204: ...A A amperes ANSI American National Standards Institute ...
Страница 205: ...B b bits B bytes baud bits per second bps bits per second ...
Страница 206: ...C C Celsius COM Computer Output Microform used in reference to a communication port CTS clear to send ...
Страница 208: ...E EIA Electronic Industries Association EMI electromagnetic interference ENET Ethernet ...
Страница 209: ...F FCC Federal Communications Commission FIFO First In First Out ft feet ...
Страница 210: ...G G ground ...
Страница 211: ...H HSI handshake input HSO handshake output Hz Hertz ...
Страница 213: ...K Kbaud kilobits per second ...
Страница 214: ...L LED light emitting diode ...
Страница 215: ...M m meters MB megabyte ...
Страница 216: ...P PC personal computer PCI Peripheral Components Interconnect ...
Страница 218: ...S s seconds SCSI Small Computer Systems Interface ...
Страница 220: ...U UART Universal Asynchronous Receiver Transmitter ...
Страница 221: ...V V volts VDC volts direct current VXI VME eXtensions for Instrumentation ...
Страница 222: ...Important Information Warranty Copyright Trademarks Patents Warning Regarding Use of NI Products Compliance ...