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):
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
identification LEDs of the adapters supported by the
igb
driver can be controlled via the
led(4) API for localization
purposes.
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
FreeBSD.
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
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:
- 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.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.
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⟩.
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
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⟩.