Glitches at the administrator or at a switch?

Question

System administration

Есть zyxel mes-3528, 15 занятых портов работают в штатном режиме т.е. сетка 100 мегабит каждый порт держит. Ставлю свежеобжатый кабель с ноутбуком на коцев с свободный порт, он начинает работать на 10 мегабитах, естественно ноут dhcp сервак не видит. Вставляю другой кабель с другим ноутбуком в другой свободный порт, тоже самое. Беру кабель который уже был в работе которых нормально работал, вставляю в порт и ноутбук, таже хрень 10 мегабит, что это??? свитч ребутал, кабеля обжимаю с 45-ых)) в чем может быть причина, у меня едет крыша ))

Answer 1

I read other comments and I am tormented by vague doubts... Who set up the switch, is it managed?
Something tells me that either vlan is somehow hardcoded, or 802.1x, or something else ..

Answer 2

Did you connect the laptop with a freshly compressed link to the ports that exactly hold 100?

Answer 3

Check the speed settings in the network adapters of the laptops. You can also force 100Mb / s on the switch.

Answer 4

1. Open the switch and inspect the power supply and switch board for swollen capacitors and other hardware problems. Solder all defective elements.
2. Connect via the console com-port on the switch, go to the management console and see how your switch is configured, since it is managed, there may be a binding to the mac-addresses of client devices and it simply blocks your laptop with a different mac-address .
3. Connect a laptop to a free port and check the status of this port through the management console. Whether the link has risen physically, whether there are any restrictions programmatically.
In my opinion, it's just that the switch has a port-mac binding, so other devices or old devices plugged into a different port do not work correctly.

Answer 5

Their power supplies are dead. We resoldered the conduits and it became good. In general, these switches are rubbish to be honest. We are getting rid of them...