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

# bse(4)

Broadcom GENET 10/100/1Gb Ethernet device

## NAME

**bse** – Broadcom GENET 10/100/1Gb Ethernet device

## SYNOPSIS

**bse\* at acpi?** **bse\* at fdt?** **brgphy\*** **at** **mii?**

## DESCRIPTION

The **bse** driver provides support for the Broadcom GENET controller found on the Raspberry Pi4.

The **bse** driver supports several media types, which are selected via the [ifconfig(8)](/ifconfig/8.md) command. The supported media types are:

- **media** autoselect

  Attempt to autoselect the media type (default)

- **media** 1000baseT **mediaopt** full-duplex

  Use 1000baseT on copper, full duplex

- **media** 1000baseT **mediaopt** half-duplex

  Use 1000baseT on copper, half duplex

- **media** 100baseTX **mediaopt** full-duplex

  Use 100baseTX, full duplex

- **media** 100baseTX **mediaopt** half-duplex

  Use 100baseTX, half duplex

- **media** 10baseT **mediaopt** full-duplex

  Use 10baseT, full duplex

- **media** 10baseT **mediaopt** half-duplex

  Use 10baseT, half duplex

## SEE ALSO

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

## HISTORY

The **bse** driver first appeared in OpenBSD 6.7.

## AUTHORS

The **bse** driver was written by Jared D. McNeill for NetBSD and ported to OpenBSD by Mark Kettenis ⟨*kettenis@openbsd.org*⟩.