Problems with upgrading to latest 6.3x versions

RouterOS General
1

I have a 2011UAS-2HnD device which runs 6.13. Recently I decided to upgrade the RouterOS. I’ve tried 6.34.3 and 6.32.3. Both of them result in the same behavior: the Ethernet interfaces go up and down every several seconds. The activity LEDs go off, stay off for ~0.5 sec, go on, flash a bit indicating the network activity and then go off again. And this repeats forever:

10:20:00 interface,info ether7 link down
10:20:00 interface,info ether8 link down
10:20:00 interface,info ether9 link down
10:20:00 interface,info ether10-wan1 link down
10:20:02 interface,info ether7 link up (speed 100M, full duplex)
10:20:02 interface,info ether9 link up (speed 100M, full duplex)
10:20:02 interface,info ether10-wan1 link up (speed 100M, full duplex)
10:20:03 interface,info ether8 link up (speed 10M, half duplex)
10:20:05 interface,info ether7 link down
10:20:05 interface,info ether8 link down
10:20:05 interface,info ether9 link down
10:20:05 interface,info ether10-wan1 link down
10:20:07 interface,info ether7 link up (speed 100M, full duplex)
10:20:07 interface,info ether9 link up (speed 100M, full duplex)
10:20:07 interface,info ether10-wan1 link up (speed 100M, full duplex)
10:20:08 interface,info ether8 link up (speed 10M, half duplex)
10:20:10 interface,info ether7 link down
10:20:10 interface,info ether8 link down
10:20:10 interface,info ether9 link down
10:20:10 interface,info ether10-wan1 link down

Downgrading to 6.13 makes it work again.

What can I do? Isn’t it a software bug?

2

I think we only added this log information in 6.13, so you probably have the same problem in old version, but have no logs.

Check the cables, switches and other devices on the other end. Problem might be elsewhere.

3

You seem to misunderstand. 6.13 works normally, it doesn’t show anything in the log and the connection is stable and fine.

With newer versions which I tested the uplink Ethernet connection works poorly. A good deal of packets is dropped due to these interface ups and downs, as shown by running ping command.

4

When upgrading RouterOS itself, make sure you also upgrade the firmware (RouterBOOT, bootloader). Failing to do so may result in what looks like hardware problems at times.