.Dd July 21 1996
.Dt WLCONFIG 8
.Os
.Sh NAME
.Nm wlconfig
.Nd read/write wavelan parameters (nwid)
.Sh SYNOPSIS
.Nm wlconfig 
.Op Fl i Ar ifname
.Op Fl r  
.Ar |
.Op Fl w Ar nwid
.Sh DESCRIPTION
The 
.Nm wlconfig 
command can be used to set the ATT Wavelan radio
lan card's 
.Nm NWID
or Network ID.
The NWID is a 2-byte parameter
passed to the card's radio modem and determines whether or not
packets (with the same NWID) will be accepted.  Packets with
different NWIDs are ignored.  In a sense, it is a logical channel.
In the hardware, NWIDs are stored long-term in non-volative memory
(called the PSA or programmable storage area), and are loaded by
software into the radio modem when the driver is initialized.
This command can be used to change ONLY the radio modem's value
and does not affect the PSA storage.  It can be used dynamically
to determine the current radio modem NWID setting or change the
NWID setting.  It might be used to set the NWID dynamically to allow
communication if you were to visit a different site with a different NWID.
It could also be used at boot to allow a different logical Wavelan link
to operate in the vicinity of a second link.  This may be useful for
test networks.
The interface must be specified
and most likely will be either 
.Nm wlp0
for the PCMCIA card
or
.Nm wl0
for the ISA card.  The
.Nm -r
parameter may be used to read the current setting.  The
.Nm -w
parameter may be used to change the NWID.  The value should be specified
as a two-nibble hex string; e.g., 0x0102.
.Pp
The command may only be executed by root.
.Sh EXAMPLE
.nr
# wlconfig -i wlp0 -w 0x0e01
.fi
.Sh HISTORY
This command is part of the Portland State University 
Mobile-IP implementation.