HULFT7 Communication Mode

In HULFT8 or higher, the communication methods for connecting to the remote host have changed.

HULFT7 does not support the functions and the communication methods that have been added in HULFT8 or higher. Refer to the following for details on the functions and the communication methods that have been added in HULFT8 or higher:

HULFT10 New Features and Compatibility Guide : Added features of HULFT10

 

When connecting to a remote host, first HULFT10 tries to connect using the enhanced communication method. When it checks the response, if HULFT10 determines that the remote host is HULFT7, it connects again using a downward-compatible communication method.

Therefore, it takes more time to connect to HULFT7 than to HULFT8 or higher.

Figure 2.29 Operation when Use HULFT7 Comm. Mode is set to 'No'

If the remote host is HULFT7, you can avoid this delay by enabling Use HULFT7 Comm. Mode, which uses a downward-compatible communication method.

To use HULFT7 Communication Mode, specify 'Yes' for the Use HULFT7 Comm. Mode (HUL7MODE) in the Host Information for each host.

Set the Use HULFT7 Comm. Mode (HUL7MODE) to 'Yes' for HULFT to connect using the downward-compatible communication method from the start, regardless of the remote host's version.

Refer to the following for details about the Host Information:

HULFT10 for IBMi Operation Manual : Host Information

Figure 2.30 Operation when Use HULFT7 Comm. Mode is set to 'Yes'

Note

If the remote host is HULFT8 or higher, and you set the Use HULFT7 Comm. Mode (HUL7MODE) to "Yes," new functions of HULFT8 or higher are subjected to the following restrictions:

  • If the ID recorded in the management information is 9 bytes or longer, an error occurs.

  • Even if you specify a long message, it is not sent to the remote host.

  • Depending on the timing of the error, the correct remote host name may not be output to the log.

  • Even if you specify the DEFLATE compression or the Zstandard compression, the file is transferred without being compressed.

Affected Communication

The following kinds of communication are affected by the setting of the Use HULFT7 Comm. Mode (HUL7MODE) in the Host Information:

  • Sending Processing

  • Resend Processing

  • Send Request

  • Resend Request

  • Remote Job Execution Request

  • Job Execution Result Notification