WORKING MODES OF A ROUTER

1.User Mode (Default mode)


2.Privilege or Administrative Mode


3.Global Configuration Mode


4.Interface Configuration Mode


5.Sub Interface Configuration Mode


6.Router Setup Mode


7.ROMMON Mode

USER MODE

This is the user mode, I,e the default prompt. It means that when ever a router boots successfully it lands into the user mode. Router cannot be configured from this mode, but it is used for just monitoring purpose.






PREVILEGE MODE or ADMINISTRATIVE MODE

It is the administrating mode, we can check whether the settings and configurations made have been implemented or not.



GLOBAL CONFIGURATION MODE

As the name indicates, it is a global configuration mode I,e. we can configure any interface from this mode, just by entering into the interface mode.




INTERFACE CONFIGURATION MODE

This is the mode used to configure interface setting like enable or disbale interface, allocate bandwidth, clock rate etc.,






SUB-INTERFACE CONFIGURATION MODE
Generally interface supports visualization where the sub interface is used to configure virtual interface.

 

ROUTER MODE
When the router is turned on it takes some time to decompress the iOS image and it will turn on. The first mode we get is the Router setup mode where it will ask us to configure the complete router from the beginning.




ROMMON MODE
On startup router will search for IOS in the RAM, if it doesn;t found it it will go to ROMMOM Mode.