Use the DPI Version 1.1 API as described in SNMP agent Distributed Protocol Interface version 1.1.

The DPI Version 2.0 API provided with z/OS® is for UNIX System Services sockets use only. Earlier versions of DPI were supported on C sockets.

See Migrating your SNMP DPI subagent to Version 2.0 for more detail about the changes that you must make to your DPI Version 1.x source.

If you want to convert to DPI Version 2.0, which prepares you also for SNMP Version 2, you must make changes to your code.

You can keep your existing DPI Version 1.1 subagent and communicate with a DPI-capable agent that supports DPI Version 1.1 in addition to DPI Version 2.0. For example, the z/OS SNMP agent provides support for multiple versions of DPI, including Version 1.0, Version 1.1, and Version 2.0.