Users Guide
WMI Troubleshooting Procedures | Troubleshooting
OMNM 6.5.3 User Guide 715
WMI Troubleshooting Procedures
The following sections describe troubleshooting common WMI problems. To monitor with WMI,
the following must be true:
• WMI must be enabled on the remote, monitored server and functioning properly.
• The remote server must be accessible through a Remote Procedure Call (RPC) connection to
run WMI queries.
If your system does not meet these conditions WMI displays an
Unknown
status.
Examples of what may prevent the above can include the following:
• Not having local Administrator rights on the monitored host.
• Firewalls blocking the WMI traffic.
• An operating system not configured for WMI.
• An error in the credential password.
To help diagnose these issues, test the WMI services, the remote WMI connections, and you
system’s component configuration.
The following topics provide troubleshooting assistance:
•
WMI Troubleshooting
on the local host.
•
Testing Remote WMI Connectivity
•
Verify Administrator Credentials
•
Enable Remote Procedure Call (RPC)
•
Configure Distributed Component Object Model (DCOM) and User Account Control
(UAC)
•
Add a Windows Firewall Exception for Remote WMI Connections
• Checking the Authentication portlet to ensure correct credentials exist.
Finally, if these troubleshooting tips are not enough, see
Additional WMI Troubleshooting
on
page 723.
WMI and Operating Systems
Best practice is to avoid using Windows Vista And Windows 2008 for network monitoring of WMI.
WMI works well Windows 7, even for larger networks. But with Vista and Window 2008 this is not
true. Some tests even indicate that Windows 7 is up to 70 times faster than Windows 2008 or Vista.
In these tests, hardware (CPU, memory) does not strongly affect WMI monitoring performance,
nor does virtualization.
WMI Troubleshooting
To troubleshoot WMI, do the following:
1
To test WMI locally, click
Start > Run
, then enter
wbemtest.exe
and then click
OK
. The
wbemtest.exe
program comes with Windows that supports WMI.
2
Click
Connect
on the Windows Management Instrumentation Tester window.