You use a Windows Server 2008-based computer or a Windows Vista-based computer as a proxy agent for Simple Network Management Protocol (SNMP) devices. When you do this, Microsoft System Center Operations Manager 2007 cannot receive SNMP trap data.

This issue also affects any application that calls the SnmpRegister function to receive SNMP trap data when the proxy agent is a Windows Server 2008-based computer or a Windows Vista-based computer.

Note: This issue does not occur if you use a Windows Server 2003-based computer or Windows XP-based computer as the proxy agent for the SNMP devices.

On a Windows Vista-based or Windows Server 2008-based computer that has the Simple Network Management Protocol (SNMP) service installed, the private memory size that is allocated by the Snmp.exe process starts to increase after several hours. This problem occurs if the Management Information Base (MIB) II Objects are frequently accessed.

The Simple Network Management Protocol (SNMP) Event Log Extension Agent does not initialize correctly on a computer that is running Windows Vista with Service Pack 1 (SP1) or Windows Server 2008. Therefore, network management middleware cannot use SNMP to retrieve event log information. When this problem occurs, the following events are logged in the Application log:

Event ID 1020

Log Name: Application
Source: EvntAgnt
Date: Date_Time
Event ID: 1020
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: ComputerName
Description:
Error processing registry parameters. Extension agent terminating.

Event ID 2019

Log Name: Application
Source: EvntAgnt
Date: Date_Time
Event ID: 2019
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: ComputerName
Description:
SNMP Event Log Extension Agent did not initialize correctly.

Event ID 2020

Log Name: Application
Source: EvntAgnt
Date: Date_Time
Event ID: 2020
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: ComputerName
Description:
SNMP Event Log Extension Agent has terminated.

Event ID 3003

Log Name: Application
Source: EvntAgnt
Date: Date_Time
Event ID: 3003
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: ComputerName
Description:
Error positioning to end of log file — can’t get oldest log record. Handle specified is 15728660. Return code from GetOldestEventLogRecord is 223.