The switch software use a standardized dot notation format.
Software image names use the following number formats to identify release and maintenance values:
Product Name.Major Release.Minor Release.Maintenance Release.Maintenance Release Update.voss
For example, the image file name 5320.8.6.1.0.voss denotes a software image for the 5320 Series product with a major release version of 8, a minor release version of 6, a maintenance release version of 1 and a maintenance release update version of 0. VOSS is the file extension.