I would disable pppoe server just before rebooting. After rebooting go to log and read the entry that is prompted for failing to install the new routeros version.
After reading the log file entry you can enable pppoe server so pppoe sessions can establish again.

I found some serious bug rebooting the devices. If you try to reboot by using winbox under System/Reboot, sometimes the router will shutdown instead of rebooting the device. That happend about 6 times on different RB (450G,493G,1100 and x86). This is not happening erverytime but to often. Rebooting ...

I got a problem upgrading a 450G last night from 4.17 to 5.0. The board didn't come up after rebooting. Unplug and plug power back solved the problem, the RB came back with installed 5.0.

Hi, I use the user-manager on ROS 4.16 as radius to authenticate about 180 users via pppoe at my access concentrator. I would like to upgrade to ROS 5.0 and use the new user-manager. Is there any chance of save the database of the ROS 4.16 user-manager and use it at the 5.0 user-manager? I'm afraid ...

Hello, got some serious problem with two of my RouterBOARDS 411. They come along with the RouterOS 4.10 and I tried to make the system package downgrade to 3.28. Downgrade worked fine but after rebooting the devices show me the following message: ROUTER HAS NO SOFTWARE KEY --------------------------...