I have a Cisco 3825 running IOS c3825-advsecurityk9-mz.124-22.YB5.binI'm trying to use the 'login local' command for the usernames I have created on the router for the aux, con and vty lines.But when I try to configure the line, the command login is ...

Hi All,Where is the IOS/bin file for the 3825 stored?  I know if there is a compact flash card loaded it can be stored there.  Can it be placed anywhere else besides the compact flash?Thanks

I have a 3825 router that is using thec3825-advsecurityk9-mz.124-15.T.bin IOS.  What is a correct and suitable upgrade to this IOS?Thanks