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

# msk(4)

Marvell Yukon-2 10/100/1Gb Ethernet device

## NAME

**msk**, **mskc** – Marvell Yukon-2 10/100/1Gb Ethernet device

## SYNOPSIS

**mskc\* at pci?** **msk\* at mskc?** **eephy\* at mii?**

## DESCRIPTION

The **msk** driver provides support for Marvell Yukon-2 88E802x, 88E805x, 88E806x, and 88E807x based Gigabit Ethernet adapters and 88E803x/88E804x based Fast Ethernet adapters, including the following:

- D-Link DGE-550SX, multimode fiber adapter

- D-Link DGE-560SX, multimode fiber adapter

- D-Link DGE-550T B1, copper adapter

- D-Link DGE-560T, copper adapter

- SysKonnect SK-9E21 single port, copper adapter

- SysKonnect SK-9E22 dual port, copper adapter

- SysKonnect SK-9E81 single port, multimode fiber adapter

- SysKonnect SK-9E82 dual port, multimode fiber adapter

- SysKonnect SK-9E91 single port, single mode fiber adapter

- SysKonnect SK-9E92 dual port, single mode fiber adapter

- SysKonnect SK-9S21 single port, copper adapter

- SysKonnect SK-9S22 dual port, copper adapter

- SysKonnect SK-9S81 single port, multimode fiber adapter

- SysKonnect SK-9S82 dual port, multimode fiber adapter

- SysKonnect SK-9S91 single port, single mode fiber adapter

- SysKonnect SK-9S92 dual port, single mode fiber adapter

- SysKonnect SK-9E21D single port, copper adapter

The Yukon-2 88E802x, 88E805x, 88E806x, and 88E807x also support jumbo frames.

The **msk** 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 [ifconfig(8)](/ifconfig/8.md) **mediaopt** option can also be used to select either **full-duplex** or **half-duplex** modes.

- **100baseTX**

  Set 100Mbps (Fast Ethernet) operation. The [ifconfig(8)](/ifconfig/8.md) **mediaopt** option can also be used to select either **full-duplex** or **half-duplex** modes.

- **1000baseT**

  Set 1000baseT (Gigabit Ethernet) operation over twisted pair. Both **full-duplex** and **half-duplex** modes are supported.

- **1000baseSX**

  Set 1000Mbps (Gigabit Ethernet) operation. Both **full-duplex** and **half-duplex** modes are supported.

The **msk** 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). To view a list of media types and options supported by the card, try **ifconfig** **\<device\>** **media**. For example, **ifconfig** **msk0** **media**.

## SEE ALSO

[arp(4)](/arp/4.md), [eephy(4)](/eephy/4.md), [ifmedia(4)](/ifmedia/4.md), [intro(4)](/intro/4.md), [netintro(4)](/netintro/4.md), [pci(4)](/pci/4.md), [hostname.if(5)](/hostname.if/5.md), [ifconfig(8)](/ifconfig/8.md)

## HISTORY

The **msk** driver first appeared in OpenBSD 4.0.

## AUTHORS

The **msk** driver was written by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.

## BUGS

The **msk** driver does not support hardware receive IP checksum offload yet.