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18. Troubleshooting
Using the iLO Virtual Serial Port with Windbg
If you want to debug a server, you can use the iLO Virtual Serial Port feature with the Windows
Windbg kernel debugger running on a local test system.
Prerequisites
PuTTY is installed on the local test system. You can download PuTTY from the following website:
http://www.putty.org/.
Procedure
1. Using the iLO web interface of the server with kernel issues, navigate to the Security -
Access Settings page, and configure the Serial Command Line Interface Speed.
The default value is 9600.
2. Configure the debug options in Windows (the boot.ini parameters for the serial
connection).
Use debugport=com2, and set the baud rate to match the configured Serial Command Line
Interface Speed.
3. Start or restart the server.
4. Press F9 in the server POST screen.
The ROM-based configuration utility starts.
5. Configure the following settings:
• Disable EMS and BIOS Serial Console.
• Set the Virtual Serial Port to COM 2.
6. To access the selection menu for the Windows debug boot option, reboot the server.
7. From the local test system, use PuTTY to connect to iLO and log in.
8. Enter the IP address for the session host name. Use the default settings for an SSH session.
When the PuTTY iLO CLI session opens, a user login window opens, unless the PuTTY session
is configured to use private keys.
It might take a minute for the prompt to appear.
9. At the </>iLO-> prompt, enter the following command: windbg_enable.
This command opens a socket to the Virtual Serial Port on port 3002.
10. To start the Windows debugger, enter the following command: windbg -k com:port=<IP-
address>,ipport=3002.
<IP-address> is the iLO IP address, and 3002 is the socket to connect to (the raw serial
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