C2951-universalk9-mz.spa.157-3.m8.bin

sha256sum C2951-universalk9-mz.spa.157-3.m8.bin

configure terminal boot system flash:C2951-universalk9-mz.spa.157-3.m8.bin end write memory reload C2951-universalk9-mz.spa.157-3.m8.bin

: Indicates the image is S igned and P roduction A uthenticated. This is a security feature to ensure the firmware hasn't been tampered with and is digitally signed by Cisco. 157-3.m8 : This is the version number ( 15.7(3)M8 ). 15.7 is the major release. (3) is the maintenance release. sha256sum C2951-universalk9-mz