Installation Manual

25 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/.
Debugging a server
1. Using the iLO web interface of the server with kernel issues, navigate to the
Administration→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 system RBSU or UEFI System Utilities start.
5. Configure the following settings:
• Disable EMS and BIOS Serial Console
• Set the Virtual Serial Port to COM 2.
For information about using the system RBSU or UEFI System Utilities, see the system
RBSU user guide or the UEFI System Utilities user guide.
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 </>hpiLO-> 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
data socket for iLO).
The ipport parameter is optional. The default port is 3002.
You can add other windbg command-line parameters if necessary. Hewlett Packard
Enterprise recommends using the -b parameter for the initial breakpoint.
Using the iLO Virtual Serial Port with Windbg 319