Managing the Retransmission Policy

The WinSNMP application can request that the Microsoft WinSNMP implementation execute the application's retransmission policy. When the implementation manages retransmission, it uses the time-out period and the retry count values in its database.

The implementation identifies the default retransmission mode in a return value from the SnmpStartup function during initialization. The mode can be one of the following values.

Value	Meaning
SNMPAPI_ON	The implementation is executing the application's retransmission policy.
SNMPAPI_OFF	The implementation is not executing the application's retransmission policy.

 

A WinSNMP application can retrieve at any time the current retransmission mode in effect for the implementation by calling the SnmpGetRetransmitMode function. The WinSNMP API provides other database functions that simplify management of the retransmission policy.

At any time during program execution, the WinSNMP application can adjust execution of the policy by performing one of the following steps:

• Request that the implementation start or stop executing the retransmission policy by calling the SnmpSetRetransmitMode function. For more information, see Turning Retransmission On and Off.
• Modify the time-out period and retry count values in the implementation's database. For more information, see Changing the Retransmission Policy.
• Call the SnmpCancelMsg function to cancel the retransmission cycle and release internal data structures associated with a single SNMP message request. For more information, see Canceling Retransmission.

The application can execute its own retransmission policy. In this case, execution may or may not be based on the values in the database.