SNMP Traps Not Properly Received by Windows 2000

View products that this article applies to.

This article was previously published under Q253302

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SYMPTOMS

A program that is running in Windows 2000 that uses the SnmpMgrGetTrapEx function to receive Simple Network Management Protocol (SNMP) traps may not appear to be receiving them.

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CAUSE

The SnmpMgrGetTrapEx function is defined as follows:

SnmpMgrGetTrapEx(
   AsnObjectIdentifier     * pEnterpriseOID,
   AsnNetworkAddress       * pAgentAddress,
   AsnNetworkAddress       * pSourceAddress,
   AsnInteger              * pGenericTrap,
   AsnInteger              * pSpecificTrap,
   AsnOctetString          * pCommunity,
   AsnTimeticks            * pTimeStamp,
   SnmpVarBindList        * pVarBindList);

Two of these parameters (pAgentAddress and pSourceAddress) are not being returned correctly in Windows 2000. pAgentAddress should return the IP address of the SNMP agent as listed in the SNMP Trap PDU, but is instead returning the IP endpoint. pSourceAddress should return the address of the IP endpoint that actually sent the trap, but is instead returning a null address.

Because of this, a program that calls this function discards any traps, making it appear that they where never received.

Two programs known to be affected by this problem are Compaq Insight Manager CIM 32 and Insight XE.

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RESOLUTION

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/EN-US/ ) How to Obtain the Latest Windows 2000 Service Pack

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STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 1.

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MORE INFORMATION

The third-party products that are discussed in this article are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.

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