Installation guide

Console User Interface 2-7
2.3 Console Environment Variables
Console environment variables allow the user to modify the way
the console commands operate.
An environment variable is a name and value association maintained by
the console program. The value associated with an environment variable
is an ASCII string (up to 127 characters in length) or an integer. Certain
environment variables are typically modified by the user to tailor the re-
covery behavior of the system on power-up and after system failures. Vola-
tile environment variables are initialized by a system reset; others are
nonvolatile across system failures.
Environment variables can be created, modified, displayed, and deleted us-
ing the create, set, show, and clear commands. A default value is associ-
ated with any variable that is stored in EEPROM. This default value is
used if the EEPROM is unreadable.
Table 2-3 lists the predefined console environment variables, their attrib-
utes, and their functions. Refer to Chapter 3, Console Commands, for ex-
amples of their use.
Table 2-3 Environment Variables
Variable Attribute Function
auto_action
Non-
volatile
Specifies the action the console will take fol-
lowing an error halt. Values are:
restart - Automatically restart. If restart
fails, boot the operating system.
boot - Automatically boot the operating
system.
halt (default) - Enter console mode.
baud
Non-
volatile
Sets the console terminal port baud rate.
Allowable values are 300, 600, 1200, 2400,
4800, and 9600. The default value is 9600.