A tool for LAN-host integration (integration of SNA and non-SNA networks, personal computers and host computers, and Internet/intranet technologies with IBM AS/400 and mainframe systems).
Version 4 of Microsoft SNA Server is a comprehensive gateway and application integration platform that enables organizations to embrace Internet, intranet, and client/server technologies while preserving their investment in AS/400 and mainframe systems.
SNA Server offers the following advantages:
In its earliest versions, SNA Server provided gateway functions for integrating TCP/IP, Internetwork Packet Exchange (IPX), NetBEUI, and Banyan VINES networks with SNA host-based environments. This provided connectivity between LAN-based client/server systems such as Microsoft BackOffice Server and host-based systems such as IBM AS/400 and mainframe computers.
In version 3 of SNA Server, this gateway functionality was extended to include facilities integration with Microsoft Windows NT applications and security. Version 4 further extends the gateway functions while enhancing SNA Server’s position as a platform for application integration. SNA Server 4 is the first SNA gateway product that combines the features of a traditional SNA gateway with middleware application capabilities.
When a LAN client attempts to communicate with an SNA network, it establishes an initial connection with an SNA server, which provides the client with the names of all SNA servers in the domain. The client then tries SNA servers randomly from these names until it locates the requested logical unit (LU). An LU is a configurable unit that specifies the type of session to be established with the mainframe or AS/400 host. The SnaBase service lets SNA servers and clients keep track of the names of SNA servers in the domain. The SNA Server is connected to the AS/400 or mainframe using a dedicated 802.2, X.25, or Synchronous Data Link Control (SDLC) link using the appropriate hardware and cabling.
SNA Server 4 includes the following new features: