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Version: 300469 (debian - 07/07/09)

Section: 4 (Pilotes et protocoles réseau)

BSD mandoc


fxp - Intel EtherExpress PRO/100 Ethernet device driver


To compile this driver into the kernel, place the following lines in your kernel configuration file:
device miibus device fxp

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf5:



The driver provides support for Ethernet adapters based on the Intel i82557, i82558, i82559, i82550, and i82562 chips. The driver supports TCP/UDP/IP checksum offload for both transmit and receive on i82550 and i82551. On i82559 only TCP/UDP checksum offload for receive is supported. TCP segmentation offload (TSO) for IPv4 as well as VLAN hardware tag insertion/stripping is supported on i82550 and i82551. Wake On Lan (WOL) support is provided on all controllers except i82557, i82259ER and early i82558 revisions.

The driver supports the following media types:

Enable autoselection of the media type and options
Set 10Mbps operation
Set 100Mbps (Fast Ethernet) operation

The driver supports the following media options:

Set full duplex operation

Note that 100baseTX media type is not available on the Pro/10. For further information on configuring this device, see ifconfig(8).

The driver supports reception and transmission of extended frames for vlan(4). This capability of can be controlled by means of the vlanmtu parameter to ifconfig(8).

The driver also supports a special link option:

Some chip revisions have loadable microcode which can be used to reduce the interrupt load on the host cpu. Not all boards have microcode support. Setting the link0 flag with ifconfig(8) will download the microcode to the chip if it is available.


Adapters supported by the driver include:


"fxp%d: couldn't map memory"
A fatal initialization error has occurred.
"fxp%d: couldn't map interrupt"
A fatal initialization error has occurred.
"fxp%d: Failed to malloc memory"
There are not enough mbuf's available for allocation.
"fxp%d: device timeout"
The device has stopped responding to the network, or there is a problem with the network connection (cable).
"fxp%d: Microcode loaded, int_delay: %d usec bundle_max: %d"
The chip has successfully downloaded the microcode, and changed the parameterized values to the given settings.


altq(4), arp(4), miibus(4), netintro(4), ng_ether4, polling(4), vlan(4), ifconfig(8)


The device driver first appeared in Fx 2.1 .


An -nosplit The device driver was written by An David Greenman . It has then been updated to use the busdma API and made endian-clean by An Maxime Henrion . This manual page was written by An David E. O'Brien .