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: Do not delete your old, stable IOS image from the flash immediately. Leave it on the storage medium so you can manually change the boot variable via console access if the 15.8(3)M7 image fails to initialize properly. The Verdict c1900universalk9mzspa1583m7bin better

If you are preparing a technical write-up for a network upgrade or a performance review of this software, you can use the following structure: Description Full feature set enabled via Universal K9 image;