Losing Network after about 12 hours
Really odd problem today.
I have an industrial touchscreen on our shop floor that won't stay networked. It's hard wired and well under 300 ft. When I first plug it in, I get a network connection instantly and everything works perfectly for about 12 hours. Then I lose http access. I can still ping, VNC, RDP, etc. Just can't access any webpages from the touchscreen.
After verifying that all of my settings are correct, I reboot. Then I don't get any network access. The NIC says "cable unplugged". I'm sure it's not the touchscreen because it works perfectly if I move it somewhere else. I ran a new cable, same thing. It ran for about 12 hours, then lost its http only. I tried a different touchscreen and new cable, same thing.
What could cause this. I know the switch isn't bad because the other touchscreens in the same switch are all working perfectly. I also tried different ports in the switch.
Thanks for any input.
I have an industrial touchscreen on our shop floor that won't stay networked. It's hard wired and well under 300 ft. When I first plug it in, I get a network connection instantly and everything works perfectly for about 12 hours. Then I lose http access. I can still ping, VNC, RDP, etc. Just can't access any webpages from the touchscreen.
After verifying that all of my settings are correct, I reboot. Then I don't get any network access. The NIC says "cable unplugged". I'm sure it's not the touchscreen because it works perfectly if I move it somewhere else. I ran a new cable, same thing. It ran for about 12 hours, then lost its http only. I tried a different touchscreen and new cable, same thing.
What could cause this. I know the switch isn't bad because the other touchscreens in the same switch are all working perfectly. I also tried different ports in the switch.
Thanks for any input.
ASKER
Tried both. Neither had any effect. And the touchscreen works if I move it to another location in the building and plug it in. At this point, it has to be hardware related, but not on the touchscreen.
If you say "I tried a different touchscreen and new cable, same thing": does that mean that is says unplugged or that it runs for 12 hours and then drops HTTP? If this is the case I'd again have a look at the cabling (did you change the 300ft or just the patch cable?) or start to change switchport, then switch.
The dropping of just web raises another question: are the web servers inside your company or do you have to cross firewall/web proxy?
The dropping of just web raises another question: are the web servers inside your company or do you have to cross firewall/web proxy?
ASKER
The webserver it's accessing is withing the company. There is not hardware or software firewalls in play here.
When I tried other touchscreens and cables, it had the same effect. Worked for 12 hours, then stopped. However, if I took it somewhere else (e.g. my office) it worked and stayed up indefinitely.
When I tried other touchscreens and cables, it had the same effect. Worked for 12 hours, then stopped. However, if I took it somewhere else (e.g. my office) it worked and stayed up indefinitely.
Use this tool to scan the open ports on the device when it is working properly to see what ports are open when it is working.
http://www.snapfiles.com/get/advportscan.html
Then next time the http access drops, do another port scan. If you get a successful connection on the http port, then the web server is working but not responding for some reason. If you don't get a connection, then either the web server service has stopped responding or something on the network is blocking it.
Is there a firewall or some network security device on your network that may be blocking traffic?
http://www.snapfiles.com/get/advportscan.html
Then next time the http access drops, do another port scan. If you get a successful connection on the http port, then the web server is working but not responding for some reason. If you don't get a connection, then either the web server service has stopped responding or something on the network is blocking it.
Is there a firewall or some network security device on your network that may be blocking traffic?
Have you actually restarted the switch?
Waht type of switch are you using? Can you send the config?
ASKER
It's a dumb switch. Not sure on the brand off the top of my head, but there's not config.
I'm currently having maintenance run a cat6 from another location to see what happens.
I'm currently having maintenance run a cat6 from another location to see what happens.
Still worth restarting it, though, dumb or otherwise. I've known switches display behaviour similar to this before. It might be holding something nonsensical regarding that NIC.
ASKER
Ok, so I've narrowed things down a bit.
I've restarted and/or replaced everything. The touchscreen, cables, switch. When I get lucky (I can't seem to find any pattern to what makes it work), it runs for 12-24 hours perfectly, then just quits. But it's not actually stopped. I've said before that I can still VNC to the machine. I can also access another one of our internal servers, one that is only text based. That prompted me to run a bandwidth check, and I found out that it dropped from the usual, near 10Mb/s down to about 10kbps. The webpage the touchscreen is supposed to be on is java with a lot of images and such, so the browser can't load it with that slow of a connection.
So new question, what would cause that sudden drop in bandwidth?
I've restarted and/or replaced everything. The touchscreen, cables, switch. When I get lucky (I can't seem to find any pattern to what makes it work), it runs for 12-24 hours perfectly, then just quits. But it's not actually stopped. I've said before that I can still VNC to the machine. I can also access another one of our internal servers, one that is only text based. That prompted me to run a bandwidth check, and I found out that it dropped from the usual, near 10Mb/s down to about 10kbps. The webpage the touchscreen is supposed to be on is java with a lot of images and such, so the browser can't load it with that slow of a connection.
So new question, what would cause that sudden drop in bandwidth?
First question with bandwidth drops: what about duplex settings? What is your switch doing, how's the touchscreen configured? Either auto-auto, full-full or half-half is allowed (ok auto-half is ok as well).
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ASKER
Didn't really resolve, just worked around.
or uninstall the nic and reinstall