Critical Bug

RouterOS General
1

I am using 2.8.26.

sometime just out of blue the MT box cannot comminucate on ethernet board, which is using onboard ethernet:

Vendor: VIA technologies
Name: VT6102 (Rhine-II) (rev: 116)
VendorID: 0x1106
DeviceID:0x3065

IRQ:11
Memory:ea021000-ea0210ff
IO:e800-e8ff

I have exactly the same mainboard with other cpu working fine without this problem. I checked everything and cable but it was okay.

I tried to reboot, then it was working but it happens sometime 20 times a day and sometimes once a week. so I set the watchdog but even after 8 times reboot it did not work.

so what I did was disable ethernet and enable, and no result
I tried to disable it inside the bridge and system stop responding, and I got disconnected, so I tried to mac-telnet (wireless) and exactly the moment I pinged my pc IP the wireless link started to work but the ethernet was not working since it was not in the bridge so I set it back again (/interface bridge port set 0 bridge=bridge1) and it started working and again after 15 minutes same thing happened.


I’m going nuts over here.
thanks

2

if a different motherboard of the exact same model works well, you should just replace the defective one

3

just bought an intel cpu and motherboard, hopefully tomorrow can install it to check it but I’m sure its mikrotik bug

4

how can you be sure ?!

You have never seen broken network card, did you?


We know nothing about your configuration, could be also some other issue… but you definitely can’t be sure this is problem in software. Oh Lord.

5

I am a little confused but are you running this unit in bridge mode?
Do you by any chance have Spanning-Tree (STP) enabled?

6

STP is not enabled, should I enable it? whats that for anyway? this problem is still kicking my ass badly.

7

STP is the Spanning Tree Protocol. Its purpose is to avoid traffic loops in Layer 2 (i.e. bridged) networks.
Simply stated, STP does this by disabling ports if it detects a network loop.

You can read more about it in any good book on networking fundamentals. I’d recommend
“Interconnections, Second Edition” by Radia Perlman, ISBN 0-201-63448-1 .

So if your network links by any chance might form a loop on Layer 2, then yes, you should enable STP
on the interfaces in question.

–Tom

8

Yes, enable STP.

9

I did enabled it and it still happens quite alot :frowning: no luck to fix this issue.

the only thing I know that when I set remove the ethernet from the bridge, it will sorta halt for 20 second but the device will not reboot and then again I put set the bridge to bridge1 and again another 20 second halt and then its working
and each time I must either do this or rebooting for couple 10 or 20 times.