The firmware, loaded automatically, is not shipped with
NetBSD; install the
pkgsrc/sysutils/ipw-firmware package. The original archive is available from Intel at:
http://ipw2100.sourceforge.net/firmware.php?fid=3.
ipw2100-1.2.fw
BSS mode (connection to an access point) firmware
ipw2100-1.2-i.fw
IBSS mode (point-to-point connection) firmware
ipw2100-1.2-p.fw
Monitor mode firmware