11 total posts
Where and how do they terminate?
Do they go to a patch panel and are they labeled so you can test them individually? Do you know if the ones gone bad might run through a common location? Perhaps over something that gets very hot? This might sound not to be possible but animals hiding in ceilings and other nooks and crannies of a building can damage wiring.
Network cable problem
I have looked in the ceiling and can not seem to find anything. The cables are away from the heating ducts. When you plug the cables into the computers they light up on the switch, but they will not ping anything and will not pick up an IP that is correct. Very frustrated at this point.
Are the dead cables all connected to the same switch?
If so, that could mean loss of connection to the router or that the switch has gone bad. You could try giving static addresses to a few PCs on the suspect cables and see if you can ping those addresses from other PCs. If that works, I'd be looking at the relay rack. If the switch is not of the auto-sensing type, perhaps the button for the uplink port has been tampered with.
Network cabling problem
I have tried assigning static IPs, but it still won't connect. I have almost come to the conclusion that the cables are not the problem. It seems to be one hallway that is out. However, some of the drops show to be sending and receiving traffic on the switch, they won't connect though. When I run the ipconfig on them, it gives them a 169 address. Won't ping the router, etc... I am wondering if we have something else going on. What do you think?
169 is the self assigned address.
You do know what this means?
It's a default and non-working address
that's created internally. You won't get a 0.0.0.0. Basically it means no address has been assigned by yourself or as requested by the device.
So you have blinking lights
Do you have everything labeled so you can trace wiring from a PC to the relay rack (presuming you use such)? Might this hallway have a switch located away from the main network closet area? If you unplug all the cables from the non working PCs, does each disconnect cause an LED to go out on a switch and is it the same switch? I do some volunteer work at a school and we did have a lightning strike that took out several ports in one switch leaving others unaffected. Any electrical "event" lately?
The electrical issue is kind of what I have been thinking too. Yes, the patch panel is labeled and when you plug the computers in the lights light up, but no connectivity. We had power surges around the time this happened that blew transformers on our wireless tower. The question is, how do I determine if that is it?
Can you reach the router from one of the dead drops?
If you can patch directly into the router with some of the individual cables and you get an internet connection, I'm thinking the problem may be with the switch. It's possible some ports work and some don't. It may also take a close examination of the relay rack wiring. I've seen loops between switching components to reek havoc. As well, managed switches that allow ports to be turned on and off or locked to MAC addresses can be an issue. I've not dealt with anything that sophisticated so cannot offer much in that regard. If your network drops terminate at a patch panel, just run a cable right to a router LAN port and see if you can connect. Good luck.