Maintaining Compatibility

These sections discuss creating a turnkey system while maintaining consistency and compatibility with other D3 platforms and releases.

Boot File /etc/inittab

The UNIX file /etc/inittab contains information on how each device is to be initialized and what has been modified. The /etc/inittab file can be modified so the desired tty devices boot directly to the D3 virtual machine.

To modify the entries in the /etc/inittab script file, use the Update Processor, the Editor, or the UNIX command vi.

The /etc/inittab file may be created or modified in AIX using the smit command.

On AIX systems, inittab entries can be added with mkitab, changed with chitab, or removed with rmitab.

See the man pages for more information on these commands and the inittab entries.

To create a turnkey D3 process on a tty, you must first disable the UNIX login. Review the topic below for more information on disabling the UNIX login with the AIX smit utility.

smit

smit (System Management Interface Tool) uses an SAA GUI, requiring function keys, BREAK key, DELETE key, and Arrow keys. Set up the TERM environment variable before accessing smit, or there will be screen problems. While in smit, use the arrow keys to move the cursor to the appropriate choice, then press ENTER.

Function keys displayed on the bottom of the screen allow moving from menu to menu. If the function keys do not work, they can be duplicated by pressing the escape key followed by the appropriate number, 1 through 9. Escape 10 is not possible. Follow the path through smit to add or change a tty device.

To add a tty:

smit > Devices > TTY > Add a tty > rs232

To change a tty:

smit > Devices > TTY > Change / Show Characteristics of a TTY

Select the tty device. The console or tty0 is created by default. To add a tty device, determine which computer slot the device is connected. AIX recognizes the card and displays the adapters currently installed. Move to the Enable LOGIN field.

• If Enable LOGIN is enabled, the tty boots up in AIX.

• If Enable LOGIN is disabled, the tty can boot up in D3.

Use the TAB key to toggle LOGIN settings. Move to TERMINAL type and enter the type desired. Use the DELETE key to delete unwanted characters. Press ENTER to implement the changes.

Terminal Types

The first time you log in to AIX, the Terminal Type must be set up to avoid screen problems. Use the AIX commands below to set up the terminal types.

• List all available AIX TERM types:

• List TERM type for the environment:

• Set TERM type for the environment:

• Set TERM type for the tty:

Serial Turnkey

A port designated as a serial turnkey process maintains compatibility. To create a turnkey system in this manner, include an entry similar to the example below in the inittab file.

An example entry to respawn tty2 to D3 port 1 is:

The label a1 is a unique two character ID. The d3 command follows the standard syntax defined in the D3 Reference Manual where:

• -n pick0 identifies the D3 configuration file

• 1 specifies the D3 PIB or port number

• -t tty2 identifies the tty to which the D3 process is attached

Setting Parameters for Serial Lines

There is a new way to configure a serial line. In the /usr/lib/pick directory, create a new subdirectory named pick_term. The pick_term directory will contain files that have serial configuration parameters for D3 lines. The name of each file is the PIB number that it represents. If the PIB is number 5, the file name is 5, and the full path to the file is:

/usr/lib/pick/pick_term/5

The files within the newly created pick_term directory contain all of the configuration parameters needed for the serial line they represent.

To set a nailed serial line to use the default parameters:

If a file has not been created to use the pick_term directory for a nailed serial line, the system assigns the default parameters.

Both examples use a serial line on tty5 and PIB5.

1. Starting a nailed serial line to use the default parameters, for example:

Omitting the -T option from the command line in the inittab sets the serial line to use the default parameters.

2. Starting a nailed serial line to use the configuration parameters stored in the pick_term directory, for example:

Adding the -T option to the command line in the inittab sets the serial line to use the configuration stored in the pick_term directory.

To create the files in the pick_term directory using the set-port command:

The files in the pick_term directory contain stty serial configuration commands, and can be created and populated manually using the set-port command.

When you use the set-port command to create the files for the pick_term directory, if a file does not already exist one will be created. If a file does exist, the existing configuration will be overwritten.

Listed below are several commands that are supported:

Examples

An example of this command at the TCL prompt is:

where

• 5 is the PIB

• 9600 is the Baud Rate

• 8 is the Word Length

• N is no Parity

• 1 is one Stop Bit

See Also

Creating a Turnkey System

Turnkey Systems

Configuring Blocks of Telnet Ports on D3

Changing inittab