re . . . RESET CISCO Configuration!

If you're experiencing NVARM problem with your CISCO router (in our case we have this 2511 Model with 12.0(4) ios) better erase it (NVRAM) - execute write erase. Or better yet reset the configuration by executing the following steps:

1. Reboot the router, while the router loading Press Control+Break

2. then a prompt >, key in o/r 0x2142

3. then a prompt >, type i (this will tell your cisco to ignore its start-up configuration file from now on and reboot)

4. after reboot , it will ask you, if you want to configure the router, answer no

5. then a prompt >

6. >enable

7. #erase startup-config

8. #configure terminal

9. #config-register 0x2102

10. #exit

11. #reload

Since I've declined to initially configure the router. So I have to configure it manually which I prefer. After everything was set to the router, make sure to save whatever configuration you have by executing, - - - copy running-config startup-config or else everything will be lost the next time you reload your machine.