VOSS software images are cryptographic signed. Code signing is the process of digitally signing executables and scripts to confirm the software author and guarantee that the code has not been altered or corrupted since it was signed. This process employs the use of a cryptographic hash to validate authenticity and integrity.
The show software command displays information about the software image:
Switch:1#show software
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software releases in /intflash/release/
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4900_mux_64 (Backup Release) (Signed Release)
VOSS4900.8.5.0.0int020 (Primary Release) (Signed Release)
The following section describes operational considerations:
You not required to provide additional input.
You can use unsigned images; however, this is not recommended. To use an unsigned image, downgrade to a pre-VOSS 8.5 software image then load a debug image.
You cannot enter Enhanced Secure Mode with an unsigned image. Enhanced Secure Mode requires a signed image.