Hi,
it is my first post so feel free to correct me. I have got a setup with MikroTik connected to the TP-Link unmanaged switch with shielded F/UTP cable going through noisy environment (namely: electric box). It’s shielding is connected to the ground via already mentioned electric box. My problem is that since a few days it keeps going link-down. At first it was enough to just replug the RJ-45 jack on the switch’s side, but it was annoying and more importantly - it is not an option anymore, since now it only randomly starts and shuts down like on these logs:
may/26 06:45:20 interface,info ether4-wifi-dol link down
may/26 06:45:23 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 06:46:40 interface,info ether4-wifi-dol link down
may/26 06:49:54 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 06:49:58 interface,info ether4-wifi-dol link down
may/26 06:50:00 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 06:51:42 interface,info ether4-wifi-dol link down
may/26 06:51:45 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 06:58:25 interface,info ether4-wifi-dol link down
may/26 06:58:27 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 07:06:25 interface,info ether4-wifi-dol link down
may/26 07:06:26 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 07:59:03 interface,info ether4-wifi-dol link down
may/26 08:01:14 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 10:20:07 interface,info ether4-wifi-dol link down
may/26 10:20:08 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 10:27:47 interface,info ether4-wifi-dol link down
may/26 10:27:49 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 10:35:34 interface,info ether4-wifi-dol link down
may/26 10:35:37 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 10:44:46 interface,info ether4-wifi-dol link down
may/26 10:44:48 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 11:09:57 interface,info ether4-wifi-dol link down
may/26 11:22:59 interface,info ether4-wifi-dol link up (speed 100M, full duplex)
may/26 11:59:59 interface,info ether4-wifi-dol link down
Right now I have no access to the cable-tester, but I will check if cables aren’t damaged as soon as I get my hands on one. Do you have any idea what could cause this strange behaviour? It doesn’t seem likely that it’s because of electric box noise, because we didn’t change any electrical equipment recently, and the thing used to work fine for months.
Thanks in advance!