igc(4) manual page

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

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

if_igc_load="YES"

The igc 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/MSI-X, TSO, and RSS.

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 bytes.

This driver version supports VLAN hardware insertion / extraction, and VLAN checksum offload. For information on enabling VLANs, see ifconfig(8). The igc 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.

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

hw.igc.igc_disable_crc_stripping
	Disable or enable hardware stripping of CRC field. This is mostly useful on BMC/IPMI shared interfaces where stripping the CRC causes remote access over IPMI to fail. Default 0 (enabled).
hw.igc.rx_int_delay
	This value delays the generation of receive interrupts in units of 1.024 microseconds. The default value is 0, since adapters may hang with this feature being enabled.
hw.igc.rx_abs_int_delay
	If hw.igc.rx_int_delay is non-zero, this tunable limits the maximum delay in which a receive interrupt is generated.
hw.igc.tx_int_delay
	This value delays the generation of transmit interrupts in units of 1.024 microseconds. The default value is 64.
hw.igc.tx_abs_int_delay
	If hw.igc.tx_int_delay is non-zero, this tunable limits the maximum delay in which a transmit interrupt is generated.
hw.igc.sbp
	Show bad packets when in promiscuous mode. Default is false.
hw.igc.rx_process_limit
	Maximum number of received packets to process at a time. Default is 100. A value of -1 means unlimited.
hw.igc.eee_setting
	Disable or enable Energy Efficient Ethernet. Default 1 (disabled).
hw.igc.max_interrupt_rate
	Maximum device interrupts per second. The default is 8000.

altq(4), arp(4), iflib(4), netintro(4), ng_ether(4), vlan(4), ifconfig(8)

The igc was originally written by Intel Corporation and converted to the iflib(4) framework by Netgate.

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

Manual Pages — IGC

NAME

CONTENTS

SYNOPSIS

DESCRIPTION

HARDWARE

LOADER TUNABLES

DIAGNOSTICS

SEE ALSO

HISTORY

AUTHORS

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.