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IGB(4) 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 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 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 configures the adapter to receive and transmit Jumbo Frames. The maxi- mum 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 sup- ported at this speed. 1000baseTX Sets 1000Mbps operation. Only full-duplex mode is sup- ported 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 de- fault 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 initializa- tion 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 (ca- ble). 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 sup- ported 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>. FreeBSD 8.1 May 14, 2010 IGB(4)
NAME | SYNOPSIS | DESCRIPTION | HARDWARE | LOADER TUNABLES | DIAGNOSTICS | SUPPORT | FILES | EXAMPLES | SEE ALSO | HISTORY | AUTHORS
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