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| Sun Installation Assistant 2.3 through 2.4 User's Guide for x64 Servers Sun Fire X4640 Server Documentation Library

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## How to Establish a Connection Using a Serial Console

Follow these steps to establish a connection using a serial console.

1. Use the boot argument `console=ttyS0,9600` to have console output redirected to the serial console.

   This is helpful when debugging and you want to be able to scroll back to see messages. This will disable output to the VGA console.

2. Set up the serial console through the serial port.

   For more information about using a serial console, see the service processor (Lights Out Manager) documentation. The default setup is for the service processor to be available through the serial port.

3. Log in to the service processor and enter the following command to start the console:

   `# start /SP/console`

4. Reboot the system.
5. Select the Network Boot option.
6. Select your SIA target, and then observe the progress of the unattended network installation.

   After booting SIA, the serial console is sometimes left in a state where it is writing black text on a black background. If this occurs, reset your terminal to view the text.

   For additional information about debugging an unattended network installation, see Debugging Unattended Installation Problems.

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