SNMP Subagent Programmer's Guide

SNMP Subagent Programmer’s Guide—119728 iii
New and Changed Information
Most of the new information in this second edition of the SNMP Subagent
Programmer’s Guide describes Subagent Toolkit implementation of the following
features, supported by the D21 (July 24, 1995) and later versions of the Toolkit and the
D22 NonStop agent IPM AAD (July 18, 1995) and later versions of the NonStop agent:
•
Enhanced subagent security. Subagents can use the management function
mgmt_security() to control the type of operation and the Management Information
Base (MIB) objects that can be operated on. This function lets subagents use
manager station community strings and IP addresses as authentication criteria.
•
Enhanced Set operation error checking. Subagents can encode Set access
functions that return failure information.
Change bars are used within sections to highlight the following information, new in this
edition:
About This Manual Recommendations for additional related reading are added.
Section 1 A discussion of the roles of the NonStop agent and subagents
in authenticating SNMP requests is added.
Section 2 The System Time Manager sample subagent is revised to
demonstrate Set access function error handling. A new
sample subagent, Security Checker, is added to demonstrate
the use of mgmt_security().
Section 4 Minor changes are made to clarify how the following
functions work: mgmt_new_instance(),
mgmt_del_instance(), mgmt_poll(), mgmt_term_env(),
mgmt_trap(), and access functions. A description of the new
management function, mgmt_security(), is added.