Either delete the old IOS file or configure the router to use the new IOS file.Īlthough the procedure of installing a new IOS image file or upgrading the existing IOS image file is fairly simple, still you should be very careful when following this procedure on a real Cisco router.
Use a file transfer protocol to copy the downloaded file into the flash memory of the router.
Download the new IOS file that includes the updates and bug fixes.
You can install a new IOS or upgrade an existing IOS in three easy steps. Fortunately, installing a new IOS image file is not as difficult and complex as installing other operating systems. In other words, for every update, you have to install a new IOS image file from scratch. It means, if you want to upgrade an existing IOS, then you have to replace the existing IOS file with the newly released IOS file. Instead of releasing bug fixes and updates separately, Cisco merges them into the original IOS file and releases that updated IOS file. Like other operating systems, Cisco does not release bug fixes and updates of the IOS as separate files. Currently, Cisco uses IOS software to manage multiple devices such as routers, high-end switches, and firewalls. Gradually, Cisco started using IOS software on its other devices as well. Cisco developed the IOS primarily for its routers. Just like Windows and Linux, the IOS is also an operating system.
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