no -a and tcp_keepint ?? Post: 302297594

Sponsored Content

Operating Systems AIX no -a and tcp_keepint ?? Post 302297594 by bakunin on Friday 13th of March 2009 11:33:48 PM

03-14-2009

Registered User

In principle: a TCP connection is a so-called "virtual channel", think of it like a telephone call: you ring someone, he picks up the call - until one of you ends this call you are connected. The same principle applies to TCP: a connection is initiated, established and after some time removed. You can monitor all this with the "netstat" utility.

After some time an idle connection is removed automatically to preserve resources of the network stack. How long the system waits and how it determines what comprises an "idle" connection is subject of the parameters you asked for. Most of the values are seconds or milliseconds.

There is an arcane fountain of knowledge you could tap for more information called the "man pages". In this case the man pages of "no", which explain the parameters in painstaking detail. I suggest you read a good book about TCP/IP concepts and protocol mechanics (i always suggest W. Richard Stevens "TCP/IP Illustrated" and Andrew Tanenbaums "Computer Networks") first.

I hope this helps.

bakunin

bakunin

View Public Profile for bakunin

Find all posts by bakunin

LEARN ABOUT HPUX

axctl

AXCTL(8)						   Linux System Managers Manual 						  AXCTL(8)

NAME

       axctl - Configure/Kill running AX.25 connections.

SYNOPSIS

       axctl [-v] port dest src window|t1|t2|t3|n2|idle|paclen|kill [parm]

DESCRIPTION

       The  axctl  command  is designed to be a multi-function command that allows miscellaneous commands to be issued to the Linux AX.25 protocol
       layer for existing AX.25 connections. The connection is uniquely identified via the combination of port, destination  callsign  and  source
       callsign, with that information the kernel is able to change the parameters, or abort the connection.

       Many  of the options are similar to those found in axparms and perform the same function. Only one parameter may be changed on each invoka-
       tion of axctl.

OPTIONS

       -v		   Displays the version number.

       window window	   Sets the window size for the AX.25 connection.

       t1 t1-timeout	   Sets the initial T1 timeout value for the AX.25 connection, the value is given in seconds.

       t2 t2-timeout	   Sets the T2 timeout value for the AX.25 connection, the value is given in seconds.

       t3 t3-timeout	   Sets the T3 timeout value for the AX.25 connected, the value is given in seconds.

       n2 n2-count	   Sets the maximum number of tries for the AX.25 connection.

       idle idle-timeout   Sets the value for the idle timer for the AX.25 connection, the value is in minutes.

       paclen paclength    Sets the maximum packet length that may be transmitted on the AX.25 connection.

       kill		   Will abort an existing AX.25 connection.

FILES

       /etc/ax25/axports

SEE ALSO

       call(1), getsockopt(2), setsockopt(2), ax25(4), axparms(8), axports(5).

AUTHORS

       Joerg Reuter DL1BKE <jreuter@poboxes.com>

Linux								   2 August 1996							  AXCTL(8)