Technical data

3. Base configuration
3.3. Console settings
CONSOLE_BLANK_TIME Defaut Setting: CONSOLE_BLANK_TIME=”
Typically, the Linux kernel activates the console’s screen saver after some time without
console input activity. The variable CONSOLE_BLANK_TIME allows you to configure the
timeout to be used or to disable the screen saver completely (CONSOLE_BLANK_TIME=’0’).
BEEP Defaut Setting: BEEP=’yes’
Causes a beep at the end of the boot or shutdown process.
If you enter ‘yes’ here, there will be a beep at the end of the boot or shutdown process.
If you suffer from an extreme shortage of space on your boot media or if you don’t like
your router to beep, use ‘no’ instead.
SER_CONSOLE Default Setting: SER_CONSOLE=’no’
The fli4l router can be used completely without any keyboard or graphics adapter. In
order to see all boot messages without Telnet or SSH access to the router it is pos-
sible to redirect all input and output from/to a serial port by setting SER_CONSOLE,
SER_CONSOLE_IF, and SER_CONSOLE_RATE to appropriate values.
The serial console can be set to three modes:
SER_CONSOLE console input/output
no Input and output over tty0
yes Input and output over serial console
primary Input and output over serial console, output addition-
ally redirected to tty0
secondary Input and output over tty0, output additionally redi-
rected to serial console
Changing the value of SER_CONSOLE affects the router only if you also update your boot
media or if you perform a remote update of the syslinux.cfg file.
If you disable the serial console, please pay attention to enable an alternative access to
the router (ssh or physical console).
You will find further information in the appendix under Serial console (Page 340).
SER_CONSOLE_IF Default Setting: SER_CONSOLE_IF=’0’
Number of the serial port to use for console output.
This variable controls the number of the serial port to use. Zero corresponds to ttyS0 or
COM1 in the DOS world, respectively.
SER_CONSOLE_RATE Default Setting: SER_CONSOLE_RATE=’9600’
Transmission rate of the serial port for console output.
This variable contains the Baud rate to use for transmitting data over the serial port.
Reasonable values are: 4800, 9600, 19200, 38400, 57600, 115200
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