---
name: "jme"
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/jme"
---

# jme(4)

JMicron JMC25x/JMC26x 10/100/1Gb Ethernet device

## NAME

**jme** – JMicron JMC25x/JMC26x 10/100/1Gb Ethernet device

## SYNOPSIS

**jme\* at pci?** **jmphy\* at mii?**

## DESCRIPTION

The **jme** driver supports PCI Express Ethernet adapters based on the JMicron JMC260 10/100 and JMC250 10/100/1Gb Ethernet chips. The Ethernet portion of the JMC261 10/100 and JMC251 10/100/1Gb chips, which incorporate a card reader, is also supported.

The **jme** driver supports IPv4 receive/transmit IP/TCP/UDP checksum offload, IPv6 receive/transmit TCP/UDP checksum offload and VLAN tag insertion and stripping.

The following *media* types are supported:

- **autoselect**

  Enable autoselection of the media type and options.

- **10baseT**

  Set 10Mbps operation.

- **100baseTX**

  Set 100Mbps (Fast Ethernet) operation.

- **1000baseT**

  Set 1000Mbps (Gigabit Ethernet) operation (some models only).

## SEE ALSO

[arp(4)](/arp/4.md), [ifmedia(4)](/ifmedia/4.md), [intro(4)](/intro/4.md), [jmphy(4)](/jmphy/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 **jme** device driver first appeared in OpenBSD 4.5.

## AUTHORS

The **jme** driver was written by Pyun YongHyeon for FreeBSD and ported to OpenBSD by Jonathan Gray ⟨*jsg@openbsd.org*⟩.