Host Configuration
For a connection to be established successfully between a host computer and a Host Integration Server 2004 computer, a number of software configuration settings (VTAM, NCP, or AS/400), and hardware characteristics must work together. These include the mainframe node ID settings, AS/400 name settings, addresses, BTU length, and link service settings.
The following table provides more details about important configuration items.
| Element | Important items to consider |
|---|---|
| Host configuration settings (VTAM, NCP, or AS/400 settings) must match the Connection and Server settings on Host Integration Server 2004 | Mainframe Node ID settings: For most mainframes, IDBLK and IDNUM in the PU definition must be matched by the two parts of the Remote Node ID on the Host Integration Server 2004 connection.
AS/400 name settings: For the AS/400, local and remote Control Point Names (CP names) and network names must match corresponding Host Integration Server 2004 settings (local names configured on the server and remote names on the connection). Addresses: For several connection types (802.2, X.25, and channel), host settings must be matched with equivalent settings on the Host Integration Server 2004 connection. For details, see the section about the type of connection you are configuring. BTU length: For the mainframe, this is set through MAXDATA in the PU definition. For the AS/400, this is set through MAXFRAME. These should equal the Max BTU Length on the Host Integration Server 2004 connection. Other settings: For some connections, other settings are also important. For example, for Synchronous Data Link Control (SDLC), the NRZ/NRZI settings on the host must match those on the Host Integration Server 2004 connection. For details about these and other settings, see the section about the type of connection you are configuring. |
| For SDLC and X.25
Communications hardware: line, modem (if applicable), and adapter characteristics must match the | Speed and duplexing: For SDLC and X.25, note the speed and duplexing capabilities of the line, modem (or DCE), and adapter, and make sure that they will not be exceeded by the settings in the Host Integration Server 2004 link service and connection. Settings for fast transmission or for full duplexing cause greater demands on hardware. (Fast transmission plus full duplexing cause the greatest demands.) The hardware element with the smallest capacity will limit the capacity of the entire system. For example, with an SDLC adapter that lacks a coprocessor, you cannot use full-duplex transmissions at high speeds, even if the modem and line can handle them. |
When configuring a new host connection or troubleshooting an existing connection, regardless of the connection type, the identifiers between the host and Host Integration Server 2004 must match. The following sections describe various configuration settings.
This section contains:
- Mainframe Connections Using Exchange Identifications (XIDs)
- Mainframe Connections Not Using (XIDs)
- AS/400 Connections
- Configuring VTAM for 3270 Access
- 802.2 Connection Parameters
- SDLC Connection Parameters
- X.25 Connection Parameters
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