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Originally Posted by pjphilli
Hi
I have previously extended the control of my astro PC located outdoors near my mount/scope to indoors via a RJ45 crossover cable. I am using
Windows XP Professional.
I have recently changed the astro PC and I am having difficulty getting
the ethernet connection working. Here is the situation:
1. Ethernet port working normally as indicated in Device Manager;
2. ipconfig indicates: IP Adress 169.254.51.212
Subnet mask: 255.255.0.0
Default Gateway: nil
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So that end is using autoconf. Is the other end doing that too? Does the PC at the other end have two network connections? The crossover to the astro and another to the 'net? If it does I don't think Windows will autoconf the x-over interface if there is a non-autoconf interface.
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I can internally ping this number successfully.
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What does that mean? You can ping it from itself, or from the house?
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3. Local Area Connection Status shows No Connectivity (the RJ45 cable
is plugged in at both ends and both PCs are active.) It says that the problem "occurred because the network did not assign a network address to the computer".
Attempt to Repair (to get a new IP address) reports: "Attempt to Repair
but Windows could not do this."
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Sounds like the analysis above might be correct or close to it. Rough up a diagram of all network cables and devices like I did in my examples.
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Is the IP address different from the Network Address?
Any suggestions?
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Yes. "Network Address" is the MAC address (media access - a level 2 concept). "IP address" is a logical address (a level 3 concept).
You can apply a static address to each end of the PC-PC link. Do not use the same subnet as any other network interface.
Do have a router or switch you can plug the astro PC into? This is 100% easier to get right than a x-over between PCs, but requires either normal cables (not x-over) or gigabit ethernet ports which sort out the cables all by themselves.
Andrew