Cisco router password recovery process

1. Connect to console port
2. Use the power switch to power cycle the router.
3. Issue the break sequence within 60 seconds of power up to put the router into ROMmon.
4. Type “confreg 0x2142” at the rommon 1> prompt.  (This changes the default configuration register and causes the router to bypass the startup configuration where the forgotten enable password is stored.The configuration register is usually set to 0x2102 or 0x102)
5. Type no after each setup question, or press Ctrl-C to skip the initial setup procedure.
6. Router> enable
7. Router#copy start run
8. Now, change the passwords and give no shutdown commands to interfaces
9. R1(config)# config-register 0x2102 (To make the startup configuration effective while next booting)