udav(4)

udav4

Davicom dm9601 10/100 usb ethernet device

Usage

udav* at uhub? amphy* at mii?

Overview

The udav driver provides support for USB Ethernet adapters based on the Davicom DM9601 USB-ether bridge chip.

The udav driver supports the following adapters:

Corega FEther USB-TXC
HenTong WK-668
Konig CMP-NWUSB10
ShanTou ST268
ShanTou ZT6688
ShanTou ADM8515

The udav driver also supports CoreChip RD9700. As many of these units ship with the same MAC address, it is highly recommended to use ifconfig(8) lladdr to set the address manually, or lladdr random to assign a random address.

For more information on configuring this device, see ifconfig(8).

Releases

45 releases since OpenBSD 3.7; the text changed 10 times.

  1. 3.7–3.8
  2. 3.9
  3. 4.0
  4. 4.1
  5. 4.2
  6. 4.3–4.6
  7. 4.7–5.2
  8. 5.3
  9. 5.4
  10. 5.5–5.7
  11. 5.8–8.0

History

The udav device driver first appeared in OpenBSD 3.7.

Authors

The udav driver was written by Shingo WATANABE ⟨[email protected]⟩ and ported to OpenBSD by Jonathan Gray ⟨[email protected]⟩.

RD9700 support by Takayoshi SASANO ⟨[email protected]⟩.

Bugs

The RD9700 sometimes lacks zero-length packets to terminate USB transactions, which can cause USB IOERRORs.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.