Since the same process and commands are used, instead of using an actual router, you should always use a simulator software such as the Packet Tracer.

No matter what you use, the process and commands are the same. Real router or simulator softwareįor practice, you can use a physical router or can use a simulator software. In the following section, we will understand how we can install or restore an IOS image file from a file server in ROMMON mode. The ROMMON mode allows us to install a new IOS image file from the file server. If a router, upon power-on, does not find a valid IOS image file, it starts in an emergency mode.

The same process is repeated each time when the router is used. When the router is powered off, all contents of the RAM (including the running IOS software) are deleted. In the running state, the router uses the IOS software from the RAM. After copying, if the IOS image file is compressed, the router extracts it. When a Cisco router is powered up, it copies the IOS image file from the flash memory to the RAM. Routers use flash memory to store the IOS image file. Cisco offers IOS software as a single image file. In other words, Cisco IOS is the operating system of Cisco routers. Cisco IOS software, just like other operating systems, provides a platform to use routers and other Cisco devices.

Extract software version from cisco ap