I recently upgrade my rb500 panel from v2.9.34 to v3.0 beta 10 but now i cant login using wnbox, telnet or ssh! I ftp the whole package then rebooted the OS but i cant login. When i use another routerboard neighbor viewer, i can see the upgraded panel with 2 interfaces one the MAC address is XXXXXXXXX and the other one its proper MAC address.
i had the same problem and i used netisntall to reinstall routeros and worked fine after that , but in the new rc1 i do see the cpu at 100% more than id like it