When I upgrade a router which was originally shipped with the c180x-broadband-mz.124-6.T7.bin IOS to a c180x-advipservicesk9-mz.124-11.T2.bin IOS the router doesn't function as I expect it to. Layer2 seems screwed and I'm not getting any arp entries from directly connected devices, let alone ping replys.
Is there an 'upgrade process' i'm missing out on ? Should a del flash:c180x.....cfg then copy tftp flash of the new IOS work?
If i downgrade the IOS back to the broadband IOS everything seems to work as expected again. Very odd. Can anyone help?