Booting Process of Cisco Router
- When Power on the Router then First it will do POST (Power on Self Test ) . The POST analyze Hardware Component of Router. It verify that all Router interface properly working or not . After the POST it will boot itself with help of Program which is store in ROM.
- After POST it search the Location of IOS in flash memory ( Internetwork OS). Bootstrap program responsible for finding IOS Program.
- After IOS found it will loaded in to RAM.
- After loading IOS it will go to NVRAM for Valid Configuration , If Configuration is available in NVRAM , then it will go to CLI mode.