Enables asynchronous tty devices to be console candidates at system boot when no console device is defined or available.
The /etc/consdef file enables tty devices such as terminals and modems to be chosen as the console device. When the console device is undefined, the system displays a message on all natively attached graphics displays and the tty on native serial port S1. The console device is undefined when:
If any of these conditions occur, the system displays the following message:
******* Please define the System Console. ******* Type a Number and press <Enter> to use this terminal as the system console.
For high function terminals (HFTs)graphics displays, the Number variable refers to a function key. For asynchronous ttys, this variable is a number.
The selected item becomes the
system console. To choose a non-default tty device as the system
console, you must first configure the /etc/consdef file.
This file contains stanzas that define various console attributes. Each
line, or entry, in a stanza must take the form of
Attribute=Value, and the line must not exceed
80 characters. The following attributes must be defined for each
|connection||Identifies the type of tty interface. Valid values are rs232 and rs422.|
|location||Specifies the location code of the terminal. Location codes of 00-00-S1-00 or 00-00-S2-00 indicate that the tty device is attached to the S1 or S2 serial port, respectively. Any other location code indicates the tty device is attached to an adapter card other than the standard I/O planar. You can display valid location values with the lsdev -C | grep tty command.|
You can also specify other terminal attributes such as speed, bpc, stops, parity, and term. If you do not define these attributes, the system uses the default values stored in the ODM database. The consdef file contains a sample stanza for the S1 port. To enable this stanza, or parts of it, remove the comment delimiters (#) from each applicable line.
To display the console selection message on the ttys attached to the S1 and S2 ports:
ALTTTY: connection=rs232 location=00-00-S1-00 speed=9600 bpc=8 stops=1 parity=none term=ibm3163
ALTTTY: connection=rs232 location=00-00-S2-00 speed=9600 bpc=8 stops=1 parity=none term=ibm3163
Note: For backward compatibility, the ALTTTY: keyword is not required for the first entry.
This file is part of Base Operating System (BOS) Runtime.
|/etc/consdef||Specifies the path of the consdef file.|
|/dev/console||Provides access to the system console.|
The chcons command.
The lsdev command.
The console special file.
Location Codes in AIX 5L Version 5.1 System Management Concepts: Operating System and Devices.