Link down, link up on all ports

RouterOS General
1

Hello, is it possible to have link down/up on all ports?

17:26:32 interface,info ether2 link up (speed 1G, full duplex)
17:26:51 interface,info ether2 link down
17:26:52 interface,info ether2 link up (speed 1G, full duplex)
17:26:58 interface,info ether1 link up (speed 1G, full duplex)
17:30:12 interface,info ether1 link down
17:30:14 interface,info ether2 link down
17:30:16 interface,info ether1 link up (speed 1G, full duplex)
17:30:16 dhcp,info dhcp-client on ether1 got IP address 109.202.82.248
17:30:19 interface,info ether2 link up (speed 1G, full duplex)
17:30:23 interface,info ether2 link down
17:30:26 interface,info ether3 link down
17:30:29 interface,info ether2 link up (speed 1G, full duplex)
17:30:32 interface,info ether3 link up (speed 1G, full duplex)
17:30:40 dhcp,info dhcp1 deassigned 192.168.20.142 for 70:3A:51:78:6A:10
17:30:40 dhcp,info dhcp1 assigned 192.168.20.142 for 70:3A:51:78:6A:10
18:49:18 interface,info ether2 link down
18:49:21 interface,info ether2 link up (speed 1G, full duplex)
18:49:25 interface,info ether2 link down
18:49:27 interface,info ether2 link up (speed 1G, full duplex)
18:53:20 interface,info ether2 link down
18:53:22 interface,info ether2 link up (speed 1G, full duplex)

router RB951G-2HnD
eth1 WAN
eth2 AP_1 EAP245 TPlink
eth3 AP_2 EAP225 Outdoor
I had to disconnect the EAP225. The connection was unstable.
Thx

2

The answer is: Yes, it’s possible.

Look at date/time.

ETH1 - WAN - what is the type of connection? does ISP makes line down for some reason?

ETH2 & ETH3 - seems to have cable connection problem

3

The connection type is stable Fiber Optic.

After disconnecting the EAP225, there is no more link down/up. Is it possible for one bad cable to affect all ports?

4

Never say “no” … change the cable and check what will happen.
On the other hand … does LAN bridge have STP enabled and APs do connect via WiFi somehow and do close a loop which STP tries to avoid?

5

The EAP225 Outdoor is POE :slight_smile:

Have you got the cables in the right way around and there is a lot that can go wrong on the power pack injector block. Wont be the first POE injector to die nor the last.

6

Thank you for your help. The error was in a poorly connected RJ45 connector.

7

Wondering why jokes about an IT guy asking: “Is power cable connected?” are so popular? :smiley: :smiley: :smiley: