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$FreeBSD: head/share/man/man4/em.4 100731 2002-07-26 20:50:35Z pdeuskar $
.Dd July 26, 2002 .Dt EM 4 .Os .Sh NAME .Nm em .Nd "Intel(R) PRO/1000 gigabit Ethernet driver for the FreeBSD operating system" .Sh SYNOPSIS .Cd "device em" .Sh DESCRIPTION The .Nm driver provides support for PCI gigabit Ethernet adapters based on the Intel 82540, 82542, 82543, 82544 and 82546 Ethernet controller chips. The driver supports Transmit/Receive checksum offload and Jumbo Frames only on 82540, 82543, 82544 and 82546-based adapters. For a list of supported adapters, see the
a README included with the driver.
p 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 .
p Support for Jumbo Frames is provided via the interface MTU setting. Selecting an MTU larger than 1500 bytes with the .Xr ifconfig 8 utility configures the adapter to receive and transmit Jumbo Frames. The maximum MTU size for Jumbo Frames is 16114.
p This driver version supports VLANs. For information on enabling VLANs, see the
a README . The .Nm driver supports the following media types: l -tag -width ".Cm 10baseT/UTP" t Cm autoselect Enables auto-negotiation for speed and duplex. t Cm 10baseT/UTP Sets 10Mbps operation. Use the .Cm mediaopt option to select .Cm full-duplex mode. t Cm 100baseTX Sets 100Mbps operation. Use the .Cm mediaopt option to select .Cm full-duplex mode. t Cm 1000baseSX Sets 1000Mbps operation. Only .Cm full-duplex mode is supported at this speed. t Cm 1000baseTX Sets 1000Mbps operation. Only .Cm full-duplex mode is supported at this speed. .El
p The .Nm driver supports the following media options: l -tag -width ".Cm full-duplex" t Cm full-duplex Forces full-duplex operation t Cm half-duplex Forces half-duplex operation. .El
p Only use .Cm mediaopt to set the driver to .Cm full-duplex . If .Cm mediaopt is not specified, the driver defaults to .Cm half-duplex .
p For more information on configuring this device, see .Xr ifconfig 8 . .Sh DIAGNOSTICS l -diag t "em%d: Unable to allocate bus resource: memory" A fatal initialization error has occurred. t "em%d: Unable to allocate bus resource: interrupt" A fatal initialization error has occurred. t "em%d: watchdog timeout -- resetting" The device has stopped responding to the network, or there is a problem with the network connection (cable). .El .Sh SUPPORT For additional information regarding building and installation, see the
a README included with the driver. For general information and support, go to the Intel support website at:
a http://support.intel.com .
p 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 . .Sh SEE ALSO .Xr arp 4 , .Xr gx 4 , .Xr netintro 4 , .Xr ng_ether 4 , .Xr vlan 4 , .Xr ifconfig 8 .Sh HISTORY The .Nm device driver first appeared in .Fx 4.4 . .Sh AUTHORS The .Nm driver was written by .An Intel Corporation Aq freebsdnic@mailbox.intel.com .