Overview

The ie25g driver provides support for any PCI Express adapter or LOM (LAN On Motherboard) based on the Intel I225 Multi Gigabit Controller. The driver supports Transmit/Receive checksum offload, Jumbo Frames, MSI, TSO, and RSS.

The maximum MTU size for Jumbo Frames is 9216 bytes.

This driver version supports VLAN hardware insertion / extraction, and VLAN checksum offload. For information on enabling VLANs, see ifconfig(8). The ie25g driver supports the following media types:

• autoselect:  Enables auto-negotiation for speed and duplex.
• 10baseT/UTP Sets 10Mbps operation:  Use the mediaopt option to select half-duplex mode.
• 100baseTX Sets 100Mbps operation:  Use the mediaopt option to select half-duplex mode.
• 1000baseT Sets 1000Mbps operation:  Only full-duplex mode is supported at this speed.
• 2500baseT Sets 2500Mbps operation:  Only full-duplex mode is supported at this speed.

Loader tunables

Tunables can be set in loader.cfg.

dev.ie25g%d.jumboframes=1

Enable jumbo frames (>1500 bytes) for the device

Hardware

The ie25g driver supports the following models:

• I225-LM
• I225-V
• I225-IT
• I225-K

Diagnostics

Diagnostic messages will be logged to System Event Log.

• ie25g%d: Hardware Initialization Failed: A fatal initialization error has occurred.
• ie25g%d: Unable to allocate bus resource: memory A fatal initialization error has occurred.
• ie25g%d: Invalid MAC address: The MAC address programmed into the EEPROM is either empty or a multicast/broadcast address.

Requirements