---
name: "if_rue"
section: "4"
platform: "linux"
package: "freebsd-manpages"
version: "6.0-5"
release: "Debian 4.0 (Etch)"
platforms: ["linux", "freebsd"]
url: "https://new.carta.tech/if_rue"
---

# if\_rue(4)

RealTek RTL8150 USB to Fast Ethernet controller driver

## NAME

**rue** – RealTek RTL8150 USB to Fast Ethernet controller driver

## SYNOPSIS

To compile support for the

**rue** driver into your kernel, place the following lines in your kernel configuration file:

**device uhci** **device ohci** **device usb** **device miibus** **device rue**

Alternatively, to load the

**rue** driver at boot time, place the following line in [loader.conf(5)](/loader.conf/5.md):

```
if_rue_load="YES"
```

## DESCRIPTION

The **rue** driver provides support for USB Ethernet adapters based on the RealTek RTL8150 USB to Fast Ethernet controller chip.

The RTL8150 contains an integrated Fast Ethernet MAC, which supports both 10 and 100Mbps speeds in either full or half duplex. Although designed to interface with 100Mbps peripheral, the existing USB standard specifies a maximum transfer speed of 12Mbps. Users should therefore not expect to actually achieve 100Mbps speeds with this device.

The **rue** driver supports the following media types:

- **autoselect**

  Enable auto selection of the media type and options. The user can manually override the auto selected mode by adding media options to the */etc/rc.conf* file.

- **10baseT/UTP**

  Set 10Mbps operation. The **mediaopt** option can also be used to select either **full-duplex** or **half-duplex** modes.

- **100baseTX**

  Set 100Mbps (Fast Ethernet) operation. The **mediaopt** option can also be used to select either **full-duplex** or **half-duplex** modes.

The **rue** driver supports the following media options:

- **full-duplex**

  Force full duplex operation.

- **half-duplex**

  Force half duplex operation.

For more information on configuring this device, see [ifconfig(8)](/ifconfig/8.md).

## HARDWARE

The **rue** driver supports RealTek RTL8150 based USB Ethernet adapters including:

- Buffalo (Melco Inc.) LUA-KTX

- Green House GH-USB100B

- LinkSys USB100M

- Billionton 10/100 FastEthernet USBKR2

## DIAGNOSTICS

- rue%d: watchdog timeout

  A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the transmission before a timeout expired.

- rue%d: rx list init failed

  The driver failed to allocate an mbuf for the transmitter ring.

- rue%d: no memory for rx list

  The driver failed to allocate an mbuf for the receiver ring.

## SEE ALSO

[arp(4)](/arp/4.md), [miibus(4)](/miibus/4.md), [netintro(4)](/netintro/4.md), [ng\_ether(4)](/ng_ether/4.md), [ifconfig(8)](/ifconfig/8.md) *ReakTek RTL8150 data sheet*, ftp://ftp.realtek.com.tw/lancard/data\_sheet/8150/.

## HISTORY

The **rue** device driver first appeared in FreeBSD 5.1.

## AUTHORS

The **rue** driver was written by Shunsuke Akiyama ⟨akiyama@FreeBSD.org⟩.