Link Up, Link down

RouterOS General
1

Hello,

I have problem with Rb on one of our installations, both links (to public and to local) goes link down and link up like in 2 seconds.
Except this in log is not anything that could cause this.
Eth 1 is WAN and Eth 2 is local TP-link switch, if one of them was dropping, but both at the same time?

Is there a posiibility of Rb being damaged or something like that?


07:58:31 system,info,account user admin logged out from 90.180.6.212 via winbox
08:00:09 interface,info ether1 link down
08:00:09 interface,info ether2 link down
08:00:11 interface,info ether1 link up (speed 1G, full duplex)
08:00:12 interface,info ether2 link up (speed 1G, full duplex)
08:00:17 system,info,account user admin logged in from 90.180.6.212 via winbox

It logs me out, local network drops, then it makes linkdown, link up and connects me again.

Thank you for your help

2

You think you can be helped when you do not mention the model of your routerboard and the RouterOS version you have running?

3

Router:RB951G-2HnD
Os version: 6.49.6

4

Ok I don’t know about link up/down problems on that model and RouterOS version.
I guess I would try checking the power adapter (try another one if you have it).

5

I can try but everytime I had problem with power supply all log was deleted, this logs link down and link up like in 2sec.

6

Are these two links to two different devices? E.g. an internet connection or modem and a local computer or switch?
If so, the cause must be from the inside. If it is not the external powersupply, it probably is a defective router.
The RB951G is normally quite dependable and not one of those new architectures where there sometimes are problems like this.