Compaq AAR04BCTE manual Troubleshooting eSNMP Problems, Modifying the Subagent Error Limit

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Troubleshooting eSNMP Problems

The eSNMP modules provided with TCP/IP Services include troubleshooting features that are useful in controlling the way your subagent works.

This chapter describes:

•How to modify the subagent error limit (Section 6.1)

•How to modify the default subagent timeout value (Section 6.2)

•Log files (Section 6.3)

For additional information about troubleshooting SNMP problems, see the Compaq TCP/IP Services for OpenVMS Tuning and Troubleshooting guide.

6.1 Modifying the Subagent Error Limit

In certain circumstances, some subagent programs might enter a loop where a select( ) call repeatedly returns a -1 error value. (Note that standard SNMP subagents and the Chess example provided in TCPIP$EXAMPLES should not exhibit this behavior.)

You can define the logical name TCPIP$SNMP_SELECT_ERROR_LIMIT to modify the number of times a -1 error value can be returned from a select( ) call.

The valid TCPIP$SNMP_SELECT_ERROR_LIMIT values range from 1 to less than 232 01(default 100). When defining the error limit, remember:

•Do not use commas when defining the number.

•If you defined the limit as 0, no limit is set.

•A defined value greater than or equal to 4000000000 triggers warning messages.

For example, to define TCPIP$SNMP_SELECT_ERROR_LIMIT to limit the number of times a -1 error value is returned to 1,000, enter the following command:

$ DEFINE/SYSTEM TCPIP$SNMP_SELECT_ERROR_LIMIT 1000

6.2 Modifying the Subagent Timeout

You can define the logical name TCPIP$ESNMP_DEFAULT_TIMEOUT to modify the default time allowed (3 seconds) before timeout occurs because of the lack of response by the subagent to the master agent. The ability to define the timeout is especially useful for slower systems and systems with heavy network traffic. The logical name is translated at startup time.

Troubleshooting eSNMP Problems 6–1