Make sure the multilink interface is tie to a physical interface...Example:interface Multilink1 description the logical interface ip address 12.1.1.1 255.255.255.252 ppp multilink ppp multilink fragment disable ppp multilink links minimum 1 ppp mult...
It will not ask you to overwrite, if the flash is capable to store both the IOS.Just make sure you got enough space.And change the boot statement and reboot.example: boot system flash:filename1.binboot system flash:filename2.binSo if your IOS dun wor...
Or shall the Bri0/0 status be in Up Up(spoofing).Since Layer 1 is not even up, i think verification of the connection will solve your problem.....If u happen to have a bri0/1, try swapping itto see how it goes.
