The filename C2951-UniversalK9-MZSPA-1573-M8-Bin breaks down into several components that provide insight into the software:
Router# show running-config | include boot c2951universalk9mzspa1573m8bin updated
The "Universalk9" image supports all feature sets (IP Base, Data, UC, Security), but you need the correct license activated. c2951universalk9mzspa1573m8bin updated
This guide covers the upgrade process, caveats, and best practices for this specific image. c2951universalk9mzspa1573m8bin updated