lltune - Sends/receives lapb or llc2 tuning parameters to/from their
lltune -s subnet_id -p protocol -P [-d device] [filename]
lltune -s subnet_id -p protocol [-G] [-d device]
lltune is a utility which either:
o puts a set of lapb parameters to the lapb driver,
o gets a set of lapb parameters from the lapb driver,
o puts a set of llc2 parameters to the llc2 driver, or
o gets a set of llc2 parameters from the llc2 driver.
By default, a get operation is performed.
These parameters are on a per-subnetwork basis and thus, the subnetwork
identifier must be specified.
The options used in lltune are the following:
subnet_id is the subnetwork to be referenced.
-p protocol specifies the protocol being used as protocol. This value
can be either lapb or llc2. This is obligatory as the tuning
parameters for lapb and llc2 are different.
-G get parameters from the lapb/llc2 (as specified by the -p
option) driver. These are written to the standard output.
Note: The -G (get) option is used as default and therefore is
optional when a 'get' is required.
-P put parameters to the lapb/llc2 driver, giving subnetwork
subnet_id these values.
-d device specify the lapb/llc2 device to be device. For an on-board
system, the default lapb device is /dev/lapb0, and the
default llc2 device is /dev/llc20. For an in-kernel system,
the default lapb device is /dev/lapb, and the default llc2
device is /dev/llc2.
The filename, as used in the 'send' option, specifies the file of
parameters to be sent (put) to LAPB or LLC2. These parameters are
described in the manual page llc2template(4). The values are read from
the standard input but this can be overridden by specifying a file of
If the filename begins with a '/', then it is assumed to be the full
path-name of the file. Otherwise, the file required is assumed to be
/var/opt/snet/template/filename. If filename is not found in the
template directory, then it is returned as invalid.
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