Bull DPX/20 Guía de instalación descargar pdf (Pagina 105)

Managing Host Connection Program

3-3

Managing HCON Sessions

How HCON sessions process data depends on the type of host connections used. The

session profiles are stored in object classes using the Object Data Manager (ODM).

Types of HCON Sessions

From the user’s point of view, HCON supports six types of sessions:

• DFT display

• non-SNA DFT printer

• HIA display

• SNA standalone printer

• SNA standalone display

• TCP/IP display

However, there are two types of DFT display sessions, SNA and non-SNA, and two types of

SNA standalone printer sessions, LU1 and LU3. These sessions process information

distinctly using different protocols between the local system and the mainframe host.

DFT Display Sessions

The DFT connection requires installation of a 3270 Connection Adapter. For both types, the

user must define the device name in the session profile. The 3270 device driver determines

whether it is SNA- or non-SNA-attached to the host, and adjusts accordingly.

Although the user defines a display model number for the SNA DFT session, the model

number may not affect how the emulator displays information. See “HCON Screen-Size

Management” on page 3-46.

For a SNA DFT display session, HCON starts an e789lus process to handle the SNA

protocol, along with the e789x or xhconx process to handle the 3270 data stream. For a

non-SNA DFT display session, only the e789x or xhconx process is started. See “HCON

Processes” on page 3-23.

TCP/IP Display Sessions

HCON supports a TCP/IP display session to a mainframe host configured with the Telnet

3270 protocol. To set up an HCON TCP/IP display session, install and configure one of the

following adapters with TCP/IP:

• Token-Ring High-Performance Network Adapter attached to a Token-Ring LAN

• Ethernet High-Performance LAN Adapter attached to an IEEE 802.3 LAN

• FDDI adapter

• X.25 Interface Co-Processor/2 attached to an X.25 packet-switching network

• Block Multiplexer Channel Adapter

• ES Connection Architecture (ESCON) Adapter.

SMIT options are available to the user in configuring HCON for a TCP/IP display session.

The Add TCP/IP Display Session menu option is available to define a TCP/IP display

session. The user must provide the host name, which is used for routing and address

resolution purposes. The number of concurrent TCP/IP display sessions is limited only by

the workstation’s memory resources and paging space. The mkhcons command can also

be used to create an HCON session profile.

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