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SNA Protocol Support 17

SNA Protocol Support

This section describes briefly the different protocols that you can use with

Eicon SNA Gateway to link to a remote host.

Integrating with IBM’s SNA

IBM’s SNA (System Network Architecture) is a seven-layered architecture that

controls the exchange of information between IBM systems. Eicon SNA

Gateway provides full support for SNA protocols including: SNA Path Control,

SNA Function Management, APPC/LU6.2, and NetView over data-link

protocols such as 802.2 LLC, SDLC, X.25/QLLC, Frame Relay, and Eicon

IDLC. These protocols are fully configurable to meet the needs of specific

implementations.

Nodes and Logical Units

In IBM’s SNA architecture, the access point for the SNA network is the logical

unit (LU). One or more LUs are managed by a Node, which is typically a

dedicated piece of equipment called the cluster controller. The gateway

protocol software emulates multiple cluster controllers on the Eiconcard,

requiring minimal overhead on the gateway PC. Eiconcards can emulate up to

32 nodes, with up to 254 fully configurable LU definitions.

SNA Connectivity

Eicon SNA Gateway provides access to a variety of IBM hosts over 802.2 LLC,

SDLC, Eicon IDLC, X.25/QLLC, and Frame Relay links. These protocols are

also supported over ISDN. With Eicon SNA Gateway you can connect to S/370,

S/390, and ES9000 mainframes, as well as AS/400, System/36, and

System/38 midrange systems.

Client workstations can use desktop terminal emulation products, such as

Aviva for Desktops, and a full range of Eicon Networks’ application

development toolkits for advanced program-to-program connectivity (APPC)

or for access to SNA host applications (SNAFM).

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Eicon Networks C21 Guida di Installazione Pagina 17