I have an issue with 6.13rc20 with PPPOE authentication stops working on eth1-gateway. I have tried to downgrade the router (RB951G-2hnd) to 6.7 as this i know to be stable in my environment. I perform the downgrade command, restart the router but nothing happens. No entry in logs or anything.
I have lodged a ticket but am still waiting for a ticket number.
edit: ticket 2014051266000588
I have the same issue with my home lab, upgrading or downgrading from 6.12rc20 does not seem to work. I have the issue on two x86 devices, a crs and a ccr.
In some rare cases it might be impossible to do any package managment
(upgrade/downgrade/enable/disable/uninstall/install) in 6.13rc13+ rc versions,
board will simply reboot itself staying on previous version
This is fixed for the release version of 6.13 (2014-May-15 14:33) and newer:
Please, use Netinstall for upgrade/downgrade