You can obtain detailed SNMP debug information on Windows NT systems without attaching a debugger by using the checked build of Snmp.exe.

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Use the following steps to log detailed debug information to a log file (Snmpdbg.log) in the %SYSTEMROOT%\SYSTEM32 subdirectory, or to the system event log.

1.	Change to the %SYSTEMROOT\SYSTEM32 subdirectory.
2.	Rename the Snmp.exe file in your %SYSTEMROOT\SYSTEM32 subdirectory to SNMP.FRE.
3.	Copy the checked Snmp.exe file to your %SYSTEMROOT\SYSTEM32 subdirectory.
4.	From a command prompt, type the following: NET START SNMP /loglevel:20 /logtype:7 Debug information will be written to %SYSTEMROOT%\SYSTEM32\SNMPDBG.LOG, and to the system event log.
5.	You can adjust the output detail by lowering the /loglevel and /logtype options to lower numbers. The command uses the following syntax, where type determines where the log is created: net start snmp [/logtype:type] [/loglevel:level] The possible values are 2 for file, 4 for eventlog, and 6 for both. The default is 4. The file option creates a file under \%SYSTEMROOT%\SYSTEM32 called SNMPDBG.LOG. A value of 8 shows the output in a DebugView window. The /LOGLEVEL:level switch determines the debug level. The higher the number, the more the detail obtained. The default is 1 (minimum), and the range is from 1 to 20.

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Sample Output Using /loglevel:20 /logtype:7

Service: Debug log type changed to 7.
Service: Begin initializing agent.
agentConfigInit: entered.
regconf: entered.
vcConfig: entered.
vcConfig: RegKey Opened OK.
vcConfig: Calling RegEnumValue.
vcConfig: value found - type :1
vcConfig: value found - name :1
vcConfig: value found - data:pigland
vcConfig: memcpy called
vcConfig: memcpy returned
vcConfig: Calling RegEnumValue again.
vcConfig: RegEnumValue returned NO_MORE_ITEMS
vcConfig: calling RegCloseKey
vcConfig: RegCloseKey returned
vcConfig: exit.
pmConfig: entered.
pmConfig: exit.
eaConfig: entered.
eaConfig: value found (eakey) - type :1
eaConfig: value found (eakey) - name :1
eaConfig: value found (eakey) -
data:SOFTWARE\Microsoft\LANManagerMIB2Agent\CurrentVersion
eaConfig: value found (agent) - type :2
eaConfig: value found (agent) - name :Pathname
eaConfig: value found (agent) - data:%SystemRoot%\System32\lmmib2.dll
eaConfig: Pathname found (agent)
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\lmmib2.dll
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\lmmib2.dll
eaConfig: ExpandEnvironmentStrings returned
C:\WINNT35\System32\lmmib2.dll
eaConfig: value found (eakey) - type :1
eaConfig: value found (eakey) - name :2
eaConfig: value found (eakey) -
data:SOFTWARE\Microsoft\RFC1156Agent\CurrentVersion
eaConfig: value found (agent) - type :2
eaConfig: value found (agent) - name :Pathname
eaConfig: value found (agent) - data:%SystemRoot%\System32\inetmib1.dll
eaConfig: Pathname found (agent)
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\inetmib1.dll
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\inetmib1.dll
eaConfig: ExpandEnvironmentStrings returned
C:\WINNT35\System32\inetmib1.dll
eaConfig: value found (eakey) - type :1
eaConfig: value found (eakey) - name :3
eaConfig: value found (eakey) -
data:SOFTWARE\Microsoft\DhcpMibAgent\CurrentVersion
eaConfig: value found (agent) - type :2
eaConfig: value found (agent) - name :Pathname
eaConfig: value found (agent) - data:%SystemRoot%\System32\dhcpmib.dll
eaConfig: Pathname found (agent)
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\dhcpmib.dll
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\dhcpmib.dll
eaConfig: ExpandEnvironmentStrings returned
C:\WINNT35\System32\dhcpmib.dll
eaConfig: value found (eakey) - type :1
eaConfig: value found (eakey) - name :4
eaConfig: value found (eakey) -
data:SOFTWARE\Microsoft\WinsMibAgent\CurrentVersion
eaConfig: value found (agent) - type :2
eaConfig: value found (agent) - name :Pathname
eaConfig: value found (agent) - data:%SystemRoot%\System32\winsmib.dll
eaConfig: Pathname found (agent)
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\winsmib.dll
eaConfig: ExpandEnvironmentStrings called
%SystemRoot%\System32\winsmib.dll
eaConfig: ExpandEnvironmentStrings returned
C:\WINNT35\System32\winsmib.dll
eaConfig: exit.
tdConfig: entered.
tdConfig: exit.
regconf: exit.
Init: Read registry parameters.
error on ipx socket 10047
error on GetProcAddress(InitEx) 127
Init: Loaded/initialized 'C:\WINNT35\System32\lmmib2.dll'.
Init: Dupping 4 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Dupping 5 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Dupping 6 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Dupping 7 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Dupping 8 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Dupping 9 - 'C:\WINNT35\System32\inetmib1.dll'.
Init: Loaded/initialized 'C:\WINNT35\System32\inetmib1.dll'.
error on GetProcAddress(InitEx) 127
Init: Loaded/initialized 'C:\WINNT35\System32\dhcpmib.dll'.
error on GetProcAddress(InitEx) 127
Init: Loaded/initialized 'C:\WINNT35\System32\winsmib.dll'.
Init: Set-up UDP listen port (SNMP).
error on IPX socket 10047
Init: created agentCommThread tid=0x76.
agentCommThread entered
agentCommThread in select
Init: becoming agentTrapThread.
Service: serviceHandlerFunction(dwControl=4).
trapThread: event 1 set.
trapThread: trap by extension agent 1.
trapThread: trap by extension agent 1.
trapThread: trap by extension agent 1.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
trapThread: event 1 set.
Service: serviceHandlerFunction(dwControl=1).
trapThread: event 0 set.
trapThread: agentTrapThread exiting.
Term: agentTrapThread returned.
Term: comm thread in safe state for termination.
Term: agentCommThread terminated.
Service: Ending execution.
				

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