i have two flash file in router one with ver 12.3 and other with 12.5. currently router is loading from 12.3 while i want router to load from new flash ver file 12.5a. please let me know how can i do this i am using 3845 router.
As Rick updated you can configure boot statement and make sure your config register value is set to 0x2102 which basically tells the router to look at the boot statement configured.
Also once you change your boot statements just save the config and reload the router and your router should boot with the image configured in first boot statement.
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