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SG300-20 - need images not in download

I ran into a switch that we were going to use for testing.  However, it had an image from 1.1.2.0.  i went to upgrade it to the latest version, 1.4.115.  However, they must have changed the way that the way they do checksums because it comes back and says it is not a valid file.  Under "all versions", they don't have any of the prior versions for me to upgrade to (such 1.2.0.0 - or anything below 1.4....   Is there a way Cisco can send me what I need to upgrade the image?

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balaji.bandi
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As per the recommendation you first have to upgrade the switch to 1.3.5.X series firmware and boot code.

 

https://community.cisco.com/t5/small-business-switches/sg300-upgade-steps-from-versions-earlier-than-1-3-5/td-p/3701910

 

Then upgrade to 1.4.X

BB

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