DHCP controls how the machine obtains an IP address -- once an IP address is set, though, DHCP is meaningless. In other words, using AddIPAddress to change the address doesn't affect DHCP at all.it merely means it obtains the address from the call, rather than from a DHCP server. That said, it shouldn't affect your communications with this VxWorks card. As long as both have valid IP addresses and are on the same LAN segment, the lack of a DHCP server shouldn't be any problem at all. However, what Nobugs was saying (and I agree with him) is that an easier solution for you may be one of the following: - If you can leave the IP address of your client as 192.168.0.215, then do just that. Leave it there, and forget changing it programmatically. - If you CAN'T leave the IP address set to that address, then buy a second NIC to dedicate to that address, and leave the first one alone.
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Michael Asher. You are trying to solve a hardware problem in software, that's not the way to do it. If your LAN doesn't get a heart attack from you claiming that static IP, there's no point in switching back and forth. Just claim the address permanently. But it will likely get upset with you, you are going to knock somebody else off the network. Who will promptly reboot her machine and knock you off. You'll have to unplug your machine first.
That gets really old really quickly. Just buy another NIC, they are a dime a dozen. Hans Passant. To _persistently_ change the IP address, you need to access the registry key: HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services TcpIp Parameters Interfaces And then iterate for the proper network card. To change it just for a single session, you can use the AddIPAddress/DeleteIPAddress functions. The following article has a code example to demonstrate how: Michael Asher Thank you very much Michael.
Warhammer 40k 5th Edition Rulebook Torrent. Actually, I'm already using AddIPAddress and DeleteIPAddress. They work very well. For example, when I add IP 192.168.0.215, I can see it in the 'Local Area Connection Status' Support tab. However, when I go to the 'Internet Protocol (TCP/IP) Properties' General tab, I see that both the 'IP Address' and 'DNS Server Address' radio groups are set to 'Obtain Automatically'. My (maybe incorrect) understanding is that this means the network adapter is still in DHCP mode. If it was not in DHCP mode, I would have expected the 'IP Address' radio button be set to 'Use the Following IP Address' 192.168.0.215 (which is the one I added with AddIPAddress). But maybe I'm wrong.
Please allow me to further clarify my application. The embedded system I must talk to via ethernet is a VxWorks-based board that has adequate but limited on-board TCP support.
When it boots, it expects to become the server (it cannot operate as a client). And it has absolutely no DHCP support.
It's IP address is static, and it expects to talk to a static client IP address (i.e. No one else will ever be on the network (guaranteed). And the PC will have only one network adapter, named 'Local Area Connection' (guaranteed). I'm a rank novice in the ethernet arena. All I know at this point is that my PC app must talk to a server that has no DHCP support of its own, and both it and the client are at static IPs.
Maybe I can do this while the PC is still in DHCP mode. I don't know. Thanks in advance for any help or clarification you can give. DHCP controls how the machine obtains an IP address -- once an IP address is set, though, DHCP is meaningless. Download Wonder Woman 1975 Lynda here. In other words, using AddIPAddress to change the address doesn't affect DHCP at all.it merely means it obtains the address from the call, rather than from a DHCP server. That said, it shouldn't affect your communications with this VxWorks card. As long as both have valid IP addresses and are on the same LAN segment, the lack of a DHCP server shouldn't be any problem at all.
However, what Nobugs was saying (and I agree with him) is that an easier solution for you may be one of the following: - If you can leave the IP address of your client as 192.168.0.215, then do just that. Leave it there, and forget changing it programmatically. - If you CAN'T leave the IP address set to that address, then buy a second NIC to dedicate to that address, and leave the first one alone. Michael Asher.