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IGB(4)		       FreeBSD Kernel Interfaces Manual			IGB(4)

NAME
     igb -- Intel(R) PRO/1000 PCI Express Gigabit Ethernet adapter driver

SYNOPSIS
     To	compile	this driver into the kernel, place the following line in your
     kernel configuration file:

	   device igb

     Alternatively, to load the	driver as a module at boot time, place the
     following line in loader.conf(5):

	   if_igb_load="YES"

DESCRIPTION
     The igb driver provides support for PCI Express Gigabit Ethernet adapters
     based on the Intel	82575 and 82576	Ethernet controller chips.  The	driver
     supports Transmit/Receive checksum	offload	and Jumbo Frames.  Furthermore
     it	supports TCP segmentation offload (TSO)	on all adapters.  The identi-
     fication LEDs of the adapters supported by	the igb	driver can be con-
     trolled via the led(4) API	for localization purposes.

     For questions related to hardware requirements, refer to the documenta-
     tion supplied with	your Intel PRO/1000 adapter.  All hardware require-
     ments listed apply	to use with FreeBSD.

     Support for Jumbo Frames is provided via the interface MTU	setting.
     Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility con-
     figures the adapter to receive and	transmit Jumbo Frames.	The maximum
     MTU size for Jumbo	Frames is 9216.

     This driver supports hardware assisted VLANs.  The	igb 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
		  full-duplex mode.

     100baseTX	  Sets 100Mbps operation.  Use the mediaopt option to select
		  full-duplex mode.

     1000baseSX	  Sets 1000Mbps	operation.  Only full-duplex mode is supported
		  at this speed.

     1000baseTX	  Sets 1000Mbps	operation.  Only full-duplex mode is supported
		  at this speed.

     The igb driver supports the following media options:

     full-duplex  Forces full-duplex operation

     half-duplex  Forces half-duplex operation.

     Only use mediaopt to set the driver to full-duplex.  If mediaopt is not
     specified,	the driver defaults to half-duplex.

     For more information on configuring this device, see ifconfig(8).

HARDWARE
     The igb driver supports Gigabit Ethernet adapters based on	the Intel
     82575 and 82576 controller	chips:

     +o	 Intel Gigabit ET Dual Port Server Adapter (82576)
     +o	 Intel Gigabit VT Quad Port Server Adapter (82575)

LOADER TUNABLES
     Tunables can be set at the	loader(8) prompt before	booting	the kernel or
     stored in loader.conf(5).

     hw.igb.rxd
	     Number of receive descriptors allocated by	the driver.  The
	     default value is 256.  The	minimum	is 80, and the maximum is
	     4096.

     hw.igb.txd
	     Number of transmit	descriptors allocated by the driver.  The
	     default value is 256.  The	minimum	is 80, and the maximum is
	     4096.

     hw.igb.enable_aim
	     If	set to 1, enable Adaptive Interrupt Moderation.	 The default
	     is	to enable Adaptive Interrupt Moderation.

FILES
     /dev/led/igb*  identification LED device nodes

EXAMPLES
     Make the identification LED of igb0 blink:

	   echo	f2 > /dev/led/igb0

     Turn the identification LED of igb0 off again:

	   echo	0 > /dev/led/igb0

DIAGNOSTICS
     igb%d: Unable to allocate bus resource: memory  A fatal initialization
     error has occurred.

     igb%d: Unable to allocate bus resource: interrupt	A fatal	initialization
     error has occurred.

     igb%d: watchdog timeout --	resetting  The device has stopped responding
     to	the network, or	there is a problem with	the network connection
     (cable).

SUPPORT
     For general information and support, go to	the Intel support website at:
     http://support.intel.com.

     If	an issue is identified with the	released source	code on	the supported
     kernel with a supported adapter, email the	specific information related
     to	the issue to <freebsdnic@mailbox.intel.com>.

SEE ALSO
     altq(4), arp(4), em(4), led(4), netintro(4), ng_ether(4), polling(4),
     vlan(4), ifconfig(8)

HISTORY
     The igb device driver first appeared in FreeBSD 7.1.

AUTHORS
     The igb driver was	written	by Intel Corporation
     <freebsdnic@mailbox.intel.com>.

FreeBSD	10.1			 May 14, 2010			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | FILES | EXAMPLES | DIAGNOSTICS | SUPPORT | SEE ALSO | HISTORY | AUTHORS

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