linux/Documentation/networking/igb.txt
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   1Linux* Base Driver for Intel(R) Network Connection
   2==================================================
   3
   4Intel Gigabit Linux driver.
   5Copyright(c) 1999 - 2010 Intel Corporation.
   6
   7Contents
   8========
   9
  10- Identifying Your Adapter
  11- Additional Configurations
  12- Support
  13
  14Identifying Your Adapter
  15========================
  16
  17This driver supports all 82575, 82576 and 82580-based Intel (R) gigabit network
  18connections.
  19
  20For specific information on how to identify your adapter, go to the Adapter &
  21Driver ID Guide at:
  22
  23    http://support.intel.com/support/go/network/adapter/idguide.htm
  24
  25Command Line Parameters
  26=======================
  27
  28The default value for each parameter is generally the recommended setting,
  29unless otherwise noted.
  30
  31max_vfs
  32-------
  33Valid Range:   0-7
  34Default Value: 0
  35
  36This parameter adds support for SR-IOV.  It causes the driver to spawn up to
  37max_vfs worth of virtual function.
  38
  39
  40Additional Configurations
  41=========================
  42
  43  Jumbo Frames
  44  ------------
  45  Jumbo Frames support is enabled by changing the MTU to a value larger than
  46  the default of 1500.  Use the ifconfig command to increase the MTU size.
  47  For example:
  48
  49       ifconfig eth<x> mtu 9000 up
  50
  51  This setting is not saved across reboots.
  52
  53  Notes:
  54
  55  - The maximum MTU setting for Jumbo Frames is 9216.  This value coincides
  56    with the maximum Jumbo Frames size of 9234 bytes.
  57
  58  - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or
  59    loss of link.
  60
  61  Ethtool
  62  -------
  63  The driver utilizes the ethtool interface for driver configuration and
  64  diagnostics, as well as displaying statistical information. The latest
  65  version of ethtool can be found at:
  66
  67  http://ftp.kernel.org/pub/software/network/ethtool/
  68
  69  Enabling Wake on LAN* (WoL)
  70  ---------------------------
  71  WoL is configured through the ethtool* utility.
  72
  73  For instructions on enabling WoL with ethtool, refer to the ethtool man page.
  74
  75  WoL will be enabled on the system during the next shut down or reboot.
  76  For this driver version, in order to enable WoL, the igb driver must be
  77  loaded when shutting down or rebooting the system.
  78
  79  Wake On LAN is only supported on port A of multi-port adapters.
  80
  81  Wake On LAN is not supported for the Intel(R) Gigabit VT Quad Port Server
  82  Adapter.
  83
  84  Multiqueue
  85  ----------
  86  In this mode, a separate MSI-X vector is allocated for each queue and one
  87  for "other" interrupts such as link status change and errors.  All
  88  interrupts are throttled via interrupt moderation.  Interrupt moderation
  89  must be used to avoid interrupt storms while the driver is processing one
  90  interrupt.  The moderation value should be at least as large as the expected
  91  time for the driver to process an interrupt. Multiqueue is off by default.
  92
  93  REQUIREMENTS: MSI-X support is required for Multiqueue. If MSI-X is not
  94  found, the system will fallback to MSI or to Legacy interrupts.
  95
  96  MAC and VLAN anti-spoofing feature
  97  ----------------------------------
  98  When a malicious driver attempts to send a spoofed packet, it is dropped by
  99  the hardware and not transmitted.  An interrupt is sent to the PF driver
 100  notifying it of the spoof attempt.
 101
 102  When a spoofed packet is detected the PF driver will send the following
 103  message to the system log (displayed by  the "dmesg" command):
 104
 105  Spoof event(s) detected on VF(n)
 106
 107  Where n=the VF that attempted to do the spoofing.
 108
 109Support
 110=======
 111
 112For general information, go to the Intel support website at:
 113
 114    www.intel.com/support/
 115
 116or the Intel Wired Networking project hosted by Sourceforge at:
 117
 118    http://sourceforge.net/projects/e1000
 119
 120If an issue is identified with the released source code on the supported
 121kernel with a supported adapter, email the specific information related
 122to the issue to e1000-devel@lists.sf.net
 123
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