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ISDNDEBUG(8)		  BSD System Manager's Manual		  ISDNDEBUG(8)

NAME
     isdndebug — display and control isdn4bsd kernel variables and statistics

SYNOPSIS
     isdndebug [-c] [-e] [-g] [-l layer] [-m] [-q] [-r] [-s value] [-u unit]
	       [-z] [-C] [-Q]

DESCRIPTION
     The isdndebug utility is part of the isdn4bsd package and is used to con‐
     trol the level of debugging output of the isdn4bsd kernel part.  Every
     layer of the isdn4bsd kernel uses a debugging mask which can be manipu‐
     lated using this utility.

     A second usage of isdndebug is to display and reset chipset specific sta‐
     tistics and/or error counters and and to display and reset the D-channel
     layer 2 (Q.921 LAPD protocol) statistics and error counters.

     The following options are available:

     -c	     Display chipset specific statistics and/or error counters.

     -e	     Set debugging mask for the selected layer(s) to display errors
	     only.

     -g	     Get the debugging mask for the selected layer(s).

     -l	     Specify the layer for which a command applies. Default is all
	     layers.

     -m	     Set debugging mask for the selected layer(s) to display all pos‐
	     sible debugging messages (maximum output).

     -q	     Display the Q.921 (D-channel layer 2) frame receive/transmit sta‐
	     tistics.

     -r	     Set debugging mask for the selected layer(s) to the compiled in
	     default (reset).

     -s	     Set debugging mask for the selected layer(s) to value. Value can
	     be specified in any number base supported by sscanf(3).

     -u	     Set the unit numbers for the -c, -q, -C and -Q flags.

     -z	     Set debugging mask for the selected layer(s) to no output at all
	     (zero).

     -H	     Reset the chipset specific statistics and/or error counters to
	     zero.

     -Q	     Reset the Q.921 (D-channel layer 2) frame receive/transmit sta‐
	     tistics to zero.

FILES
     /dev/i4bctl

EXAMPLES
     The command:

	   isdndebug -g

     displays the current debugging level for all ISDN layers

AUTHORS
     The isdndebug utility and this manpage were written by Hellmuth Michaelis
     ⟨hm@kts.org⟩.

BSD				 May 31, 2000				   BSD

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