The following procedure assumes you are connecting to the serial port (ttya) of the Sun Fire V490 system using a tip connection from serial port B (ttyb) of another Sun server, and that the other Sun server has its own local graphics terminal.
Procedure:
1. Decide whether you need to reset OpenBoot configuration variables on the Sun Fire V490 system.
Certain OpenBoot configuration variables control from where system console input is taken and to where its output is directed.
* If you are installing a new system – The default OpenBoot configuration variable settings will work properly. You do not need to reset the variables. Skip to Step 3.
* If you have previously altered OpenBoot configuration variable settings – For example, to use the system controller as the system console, you need to change the OpenBoot configuration variables back to their default values. Continue with the next step from the existing system console.
* If you are not sure whether OpenBoot configuration variable settings have been altered – Refer to “How to View and Set OpenBoot Configuration Variables” on page 178. Verify that the settings are as given in Reference for System Console OpenBoot Variable Settings. If not, reset them as described in the next step.
2. If necessary, reset OpenBoot configuration variables.
From the existing system console, type:
ok setenv diag-out-console false
ok setenv input-device ttya
ok setenv output-device ttya
Note – There are many other OpenBoot configuration variables, and although these do not affect which hardware device is used as the system console, some of them affect what diagnostic tests the system runs and what messages the system console displays. For details, refer to Controlling POST Diagnostics.
3. Connect the RJ-45 serial cable and adapter.
The cable and adapter connect the Sun server’s ttyb serial port to the Sun Fire V490 system’s built-in ttya serial port. Pinouts, part numbers, and other details about the serial cable and adapter are provided in the Sun Fire V490 Server Parts Installation and Removal Guide.
4. Ensure that the /etc/remote file on the Sun server contains an entry for hardwire.
Most releases of Solaris OS software shipped since 1992 contain an /etc/remote file with the appropriate hardwire entry. However, if the Sun server is running an older version of Solaris OS software, or if the /etc/remote file has been modified, you may need to edit it. Refer to How to Modify the /etc/remote File for details.
5. In a terminal tool window on the Sun server, type:
hostname% tip hardwire
The Sun server responds by displaying:
connected
The terminal tool is now a tip window directed to the Sun Fire V490 system via the Sun server’s ttyb port. This connection is established and maintained even if the Sun Fire V490 system is completely powered off or just starting up.
References: http://docs.sun.com