Routers on CE1220

Routers

Anatomy of a Router

• A Router is a Computer

  •Routers have CPU, memory and I/O devices

  •Cisco routers use IOS as their operating system.

• Router Memory

  •Just as a computer, routers have memory.

  •Routers contain RAM, ROM, NVRAM and Flash memory.

• Inside a Router

  •Routers have the same general structure.

• Connect to a Router

  •Routers have may ports to support connections.

• LAN and WAN Interfaces

  •Routers have LAN and WAN ports.

  •Different models ship with different ports.

  •Ethernet is very common on different router
  

 models.

• Bootset Files

    •IOS image file, stored in the Flash, contains the IOS. 

    •The Flash also stores other system files. 

    •The NVRAM stores configuration parameters.

• Router Bootup Process

    1.Perform the POST and load the bootstrap program.

    2.Locate and load the Cisco IOS software. 

    3.Locate and load the startup configuration file or enter setup mode

• Show Version Output

    •The show version command is very useful.

    •It provides information on the amounts of memory installed, what IOS images was         loaded during boot and more.

rsRouters