Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages


home | help
RUM(4)		       FreeBSD Kernel Interfaces Manual			RUM(4)

     rum -- Ralink Technology/MediaTek USB IEEE	802.11a/b/g wireless network

     rum* at uhub? port	?

     The rum driver supports USB 2.0 and PCI Express Mini Card wireless
     adapters based on the Ralink RT2501USB and	RT2601USB chipsets.

     Ralink PCI	Express	Mini Card adapters show	up as normal USB 2.0 devices
     and are thus handled by the rum driver.

     The RT2501USB chipset is the second generation of 802.11a/b/g adapters
     from Ralink.  It consists of two integrated chips,	an RT2571W MAC/BBP and
     an	RT2528 or RT5226 radio transceiver.

     The RT2601USB chipset consists of two integrated chips, an	RT2671 MAC/BBP
     and an RT2527 or RT5225 radio transceiver.	 This chipset uses the MIMO
     (multiple-input multiple-output) technology with multiple antennas	to ex-
     tend the operating	range of the adapter and to achieve higher throughput.

     These are the modes the rum driver	can operate in:

     BSS mode	    Also known as infrastructure mode, this is used when asso-
		    ciating with an access point, through which	all traffic
		    passes.  This mode is the default.

     IBSS mode	    Also known as IEEE ad-hoc mode or peer-to-peer mode.  This
		    is the standardized	method of operating without an access
		    point.  Stations associate with a service set.  However,
		    actual connections between stations	are peer-to-peer.

     Host AP	    In this mode the driver acts as an access point (base sta-
		    tion) for other cards.

     monitor mode   In this mode the driver is able to receive packets without
		    associating	with an	access point.  This disables the in-
		    ternal receive filter and enables the card to capture
		    packets from networks which	it wouldn't normally have ac-
		    cess to, or	to scan	for access points.

     The rum driver can	be configured to use Wired Equivalent Privacy (WEP) or
     Wi-Fi Protected Access (WPA1 and WPA2).  WPA2 is the current encryption
     standard for wireless networks.  It is strongly recommended that neither
     WEP nor WPA1 are used as the sole mechanism to secure wireless communica-
     tion, due to serious weaknesses.  WPA1 is disabled	by default and may be
     enabled using the option "wpaprotos wpa1,wpa2".  For standard WPA net-
     works which use pre-shared	keys (PSK), keys are configured	using the
     "wpakey" option.  WPA-Enterprise networks require use of the wpa_suppli-
     cant package.  The	rum driver relies on the software 802.11 stack for
     both encryption and decryption of data frames.

     The rum driver can	be configured at runtime with ifconfig(8) or on	boot
     with hostname.if(5).

     The following firmware file is loaded when	an interface is	brought	up:


     The following adapters should work:

	   3Com	Aolynk WUB320g
	   Abocom WUG2700
	   Airlink101 AWLL5025
	   ASUS	WL-167g	ver 2
	   Atlantis Land A02-UP1-W54
	   Belkin F5D7050 ver 3
	   Belkin F5D9050 ver 3
	   Belkin F5D9050C
	   Buffalo WLI-U2-SG54HG
	   Buffalo WLI-U2-SG54HP
	   Buffalo WLI-U2-G54HP
	   CNet	CWD-854	ver F
	   Conceptronic	C54RU ver 2
	   Corega CG-WLUSB2GL
	   Corega CG-WLUSB2GO
	   Corega CG-WLUSB2GPX
	   D-Link DWA-110
	   D-Link DWA-111
	   D-Link DWL-G122 rev C1
	   D-Link WUA-1340
	   Digitus DN-7003GR
	   Edimax EW-7318Ug
	   Edimax EW-7318USg
	   Edimax EW-7618Ug
	   Gigabyte GN-WB01GS
	   Gigabyte GN-WI05GS
	   Hawking HWUG1
	   Hawking HWU54DM
	   Hercules HWGUSB2-54-LB
	   Hercules HWGUSB2-54V2-AP
	   LevelOne WNC-0301USB	v3
	   Linksys WUSB200
	   Linksys WUSB54G rev C
	   Linksys WUSB54GR
	   Planex GW-US54HP
	   Planex GW-US54Mini2
	   Planex GW-USMM
	   Senao NUB-3701
	   Sitecom WL-113 ver 2
	   Sitecom WL-172
	   Sweex LW053

     The following example scans for available networks:

	   # ifconfig rum0 scan

     The following hostname.if(5) example configures rum0 to join network
     "mynwid", using WPA key "mywpakey", obtaining an IP address using DHCP:

	   nwid	mynwid wpakey mywpakey

     The following hostname.if(5) example creates a host-based access point on

	   mediaopt hostap
	   nwid	mynwid wpakey mywpakey

     rum0: error N, could not read firmware ...	 For some reason, the driver
     was unable	to read	the microcode file from	the filesystem.	 The file
     might be missing or corrupted.

     rum0: could not load 8051 microcode  An error occurred while attempting
     to	upload the microcode to	the onboard 8051 microcontroller unit.

     rum0: device timeout  A frame dispatched to the hardware for transmission
     did not complete in time.	The driver will	reset the hardware.  This
     should not	happen.

     arp(4), ifmedia(4), intro(4), netintro(4),	usb(4),	hostname.if(5),
     hostapd(8), ifconfig(8)

     The rum driver first appeared in OpenBSD 4.0.

     The rum driver was	written	by Niall O'Higgins <>	and
     Damien Bergamini <>.

     The rum driver supports automatic control of the transmit speed in	BSS
     mode only.	 Therefore the use of a	rum adapter in Host AP mode is dis-

     This driver does not support powersave mode.

FreeBSD	13.0		       November	10, 2019		  FreeBSD 13.0


Want to link to this manual page? Use this URL:

home | help