Updating cisco ios

Cisco network engineers should know how to correctly perform a router image update/upgrade.This article covers the different image types that exist on most Cisco equipment, Cisco’s image-naming structure, and how to perform image updates/upgrades.The boot image is a subset of the Cisco IOS software that is used when network booting when loading IOS images onto a device or when the system image has been corrupted.Depending on the platform, the boot image can be contained within ROM or flash memory.This section reviews the most commonly taught methods; it is by no means a complete list of the possibilities.Generally, most engineers rely on a Trivial File Transfer Protocol (TFTP) server and client (the device) to do image updates/upgrades.The structure of the IOS image is typically image that contains the code for all features.


Upgrading the Internetwork Operating System (IOS) on a Cisco device is a pretty common procedure as updated IOS images are released at least once every three months to fix bugs and provide new features and enable new device hardware.On most Cisco platforms, two different images are held within a device.



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