No network interfaces found (verifyNetworkConnection)
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@Wayne-Workman I agree that something is not configured correctly on the building switch. By putting an unmanaged switch in between it fixes (masks) the issue. Because the building switch is never seeing the port drop as the target computer transitions between phases during booting.
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@george1421 I’ve actually seen this exact issue with our systems as well. Not very often, and the fix is indeed to put a managed switch between. Or, alter the firmware on windows to now put the nic into a “Power-saving” mode.
The latter is not a simple thing and is only good for that instance of the OS, if your image doesn’t have those firmware changes in place, they will not hold.
Please help us build the FOG community with everyone involved. It's not just about coding - way more we need people to test things, update documentation and most importantly work on uniting the community of people enjoying and working on FOG! Get in contact with me (chat bubble in the top right corner) if you want to join in.
Web GUI issue? Please check apache error (debian/ubuntu: /var/log/apache2/error.log, centos/fedora/rhel: /var/log/httpd/error_log) and php-fpm log (/var/log/php*-fpm.log)
Please support FOG if you like it: https://wiki.fogproject.org/wiki/index.php/Support_FOG
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@Tom-Elliott Can you elaborate (further) ?
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I know this isn’t going to help, but I had 18 OptiPlex 7010s in a lab, and several had this issue. I noticed that the ones that had the issue had a different BIOS version from the others. After updating the BIOS, the issue was resolved in this case.
In another lab with 7010s, I had the same issue with a couple of machines, but it was unrelated to the BIOS version. Instead, the network connection just wasn’t “good enough” for FOG to see for some reason. In Windows, these machines could connect, but FOG just wasn’t having it for some reason. We replaced the patch cable at the the switch, and it resolved the issue. I figured that if Windows thought the connection was acceptable that FOG would, too, but that is most definitely not the case at all.
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@loosus456 That does help. I’ll update the firmware and see if it has any effect.
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I just updated an Optiplex 7010 from A12 to A21.
Early results don’t look any different.
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I’ve disabled all power saving features in Firmware - still no luck.
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Network team says that “spanning-tree portfast” is set on all client ports in the building.
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Ok…
I’m feeling pretty ignorant at the moment.
I got to messing with this again and was able to try out a new unmanaged 1Gbps Cisco switch with it and I went through several different configurations in my tests and kept getting inconsistent results.
I have finally found out what the issue was. It was a bad patch cable the whole time.
That’s pretty shameful on my part as a technician, but it would be more shameful to conceal my mistake and not report what the issue was.
I do believe I exhausted every single other possible option before I realized it was the patch cable. Checking simple things first is hammered into all of us as troubleshooters, and the lesson has definitely been reinforced in me.
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@Wayne-Workman Thanks a lot for letting us know!!
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@wayne-workman I’m having the same problem. Did you find a solution?
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@thyago did you check your patch cable? Are you sure it’s working properly? Have you read through the whole post to try other things as suggested to see if it helps your situation.
The solution for the problem was replacing a patch cable, for this instance. We have no idea about yours. As this thread was 2 years old I’d recommend starting a new thread giving us the details of the problem and things you’ve already tried.
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I know you said @Tom-Elliott that this post is old and that @thyago should start a new thread.
I just had the same problem and what worked for me was to have both network cards connected to the switch. (Computer was Dell R5500).
