---
name: "aue"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/aue"
---

# aue(4)

ADMtek AN986/ADM8511 Pegasus family 10/100 USB Ethernet device

## NAME

**aue** – ADMtek AN986/ADM8511 Pegasus family 10/100 USB Ethernet device

## SYNOPSIS

**aue\* at uhub?** **acphy\* at mii?** **bmtphy\* at mii?** **sqphy\* at mii?**

## DESCRIPTION

The **aue** driver provides support for USB Ethernet adapters based on the ADMtek AN986 ("Pegasus") and ADM8511 ("Pegasus II") chipsets. This includes the following adapters:

- 3Com 3c460b

  - Abocom UFE1000

  - Abocom DSB650TX

  - Accton USB320-EC

  - Accton SpeedStream Ethernet

  - Admtek Pegasus

  - Admtek Pegasus II

  - AEI USB Fast Ethernet

  - Allied Telesyn AT-USB100

  - ATEN UC-110T

  - Belkin F5D5050

  - Billionton Systems USB100

  - Billionton Systems USB100EL

  - Billionton Systems USB100LP

  - Billionton Systems USBE100

  - Corega FEther USB-TX

  - Corega FEther USB-TXS

  - D-Link DSB-650

  - D-Link DSB-650TX

  - D-Link DSB-650TX-PNA

  - ELCON Systemtechnik Goldpfeil P-LAN

  - Elecom LD-USB/TX

  - Elecom LD-USB20

  - Elecom LD-USBL/TX

  - Elsa Microlink USB2Ethernet

  - GIGABYTE GN-BR402W

  - Hawking UF100

  - HP HN210E

  - I/O DATA USB ET/TX

  - I/O DATA USB ET/TX-S

  - I/O DATA ETX-US2

  - Kingston KNU101TX

  - Laneed LD-USBL/TX

  - Linksys USB100TX

  - Linksys USB100H1

  - Linksys USB10T

  - Linksys USB10TA

  - Linksys USB10TX

  - Logitec LAN-TX/U1H2

  - Melco Inc. LUA-TX

  - Melco Inc. LUA2-TX

  - Microsoft MN110

  - Mobility EasiDock Ethernet

  - Netgear FA101

  - Omnidirectional Control Technology USB TO Ethernet

  - Siemens SpeedStream USB

  - Smartbridges smartNIC 2

  - SMC 2202USB/ETH

  - SMC 2206USB/ETH

  - SOHOware NUB100

  - SOHOware NUB110

  The Pegasus family of chipsets contain a 10/100 Ethernet MAC with an MII interface and are designed to work with both Ethernet and HomePNA transceivers. Although the chipsets are designed to interface with 100Mbps peripherals, the USB 1.x standards specify a maximum transfer speed of 12Mbps. Users should therefore not expect to actually achieve 100Mbps speeds with these devices.

The Pegasus chipsets support a 64-bit multicast hash table, single perfect filter entry for the station address and promiscuous mode. Packets are received and transmitted over separate USB bulk transfer endpoints.

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

- autoselect

  Enable autoselection of the media type and options. The user can manually override the autoselected mode by adding media options to the appropriate [hostname.if(5)](/hostname.if/5.md) file.

- 10baseT

  Set 10Mbps operation. The *mediaopt* option can also be used to enable *full-duplex* operation. Not specifying *full* *duplex* implies *half-duplex* mode.

- 100baseTX

  Set 100Mbps (Fast Ethernet) operation. The *mediaopt* option can also be used to enable *full-duplex* operation. Not specifying *full* *duplex* implies *half-duplex* mode.

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

- full-duplex

  Force full duplex operation. The interface will operate in half duplex mode if this media option is not specified.

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

## DIAGNOSTICS

- aue0: 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.

- aue0: no memory for rx list

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

## SEE ALSO

[acphy(4)](/acphy/4.md), [arp(4)](/arp/4.md), [bmtphy(4)](/bmtphy/4.md), [ifmedia(4)](/ifmedia/4.md), [intro(4)](/intro/4.md), [netintro(4)](/netintro/4.md), [sqphy(4)](/sqphy/4.md), [usb(4)](/usb/4.md), [hostname.if(5)](/hostname.if/5.md), [ifconfig(8)](/ifconfig/8.md) *ADMtek AN986 and ADM8511 data sheets*.

## HISTORY

The **aue** device driver first appeared in FreeBSD 4.0. OpenBSD support was added in OpenBSD 2.7.

## AUTHORS

The **aue** driver was written by Bill Paul ⟨*wpaul@ee.columbia.edu*⟩ and ported to OpenBSD by Aaron Campbell ⟨*aaron@openbsd.org*⟩.