Recently, I created a short video that shows you how to upgrade the Cisco Internetwork Operating System (IOS). It is a step-by-step eight-minute video. It was originally published over at SearchNetworking.com.
In this video, I walk you through the IOS upgrade, including router configuration, and provide advice on what you’ll need to get started.
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David Davis (CCIE #9369, VCP, CISSP, MCSE) has been in the IT industry for 15+ years. He has authored over 300 articles, 6 video training courses, and co-authored one book. Learn about David's certifications, video courses, and where you can find his content on our 
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Very useful & easy to do it