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.conf5:
if_igb_load="YES"
DESCRIPTION
The
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.
For questions related to hardware requirements, refer to the
documentation supplied with your Intel PRO/1000 adapter.
All hardware requirements listed apply to use with
Fx .
Support for Jumbo Frames is provided via the interface MTU setting.
Selecting an MTU larger than 1500 bytes with the
ifconfig(8)
utility configures the adapter to receive and transmit Jumbo Frames.
The maximum MTU size for Jumbo Frames is 9216.
This driver supports hardware assisted VLANs.
The
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
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
driver supports Gigabit Ethernet adapters based on the Intel 82575 and
82576 controller chips:
Intel Gigabit ET Dual Port Server Adapter (82576)
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.conf5.
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.
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
Aq freebsdnic@mailbox.intel.com .
