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Systems Network Architecture/Management Services (SNA/MS) has been enhanced to give network users change management capabilities. The first IBM products implementing change management are NetView™ Distribution Manager R2 and the 3174 Control Unit with the Central Site Change Management microcode function. This paper describes the design selected and the functions provided: Retrieve, Send, Delete, Install, Send-and-Install, Remove, Accept, and Activate. It also describes how SNA/MS makes use of another new SNA component designed for it—SNA/File Services, described in another paper in this issue. (Although not strictly necessary, it is recommended that the other paper be read prior to reading this one.) SNA/File Services, in turn, uses an enhanced SNA/Distribution Services format to provide an architecture for file distribution in an SNA network.
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