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COPE the first practical network coding scheme which is developped on click

    Each descriptor is 16 bytes.  A receive buffer is also allocated for each
    descriptor and can be either 2048, 4096, 8192, or 16384 bytes, depending 
    on the MTU setting. The maximum MTU size is 16110.

    NOTE: MTU designates the frame size. It only needs to be set for Jumbo 
          Frames.

RxIntDelay
Valid Range: 0-65535 (0=off)
Default Value: 0 (82542, 82543, and 82544-based adapters)
               128 (82540, 82545, and 82546-based adapters)
    This value delays the generation of receive interrupts in units of 1.024 
    microseconds.  Receive interrupt reduction can improve CPU efficiency if 
    properly tuned for specific network traffic. Increasing this value adds 
    extra latency to frame reception and can end up decreasing the throughput 
    of TCP traffic. If the system is reporting dropped receives, this value 
    may be set too high, causing the driver to run out of available receive 
    descriptors.

    CAUTION: When setting RxIntDelay to a value other than 0, adapters based 
             on the Intel 82543 and 82544 LAN controllers may hang (stop 
             transmitting) under certain network conditions. If this occurs a
             message is logged in the system event log. In addition, the 
             controller is automatically reset, restoring the network 
             connection. To eliminate the potential for the hang ensure that 
             RxIntDelay is set to 0.

RxAbsIntDelay (82540, 82545, and 82546-based adapters only)
Valid Range: 0-65535 (0=off)
Default Value: 128
    This value, in units of 1.024 microseconds, limits the delay in which a 
    transmit interrupt is generated. Useful only if RxIntDelay is non-zero, 
    this value ensures that an interrupt is generated after the initial 
    packet is received within the set amount of time.  Proper tuning,
    along with RxIntDelay, may improve traffic throughput in specific network
    conditions.

Speed (adapters using copper connections only)
Valid Settings: 0, 10, 100, 1000
Default Value: 0 (auto-negotiate at all supported speeds)
    Speed forces the line speed to the specified value in megabits per second
    (Mbps). If this parameter is not specified or is set to 0 and the link 
    partner is set to auto-negotiate, the board will auto-detect the correct 
    speed. Duplex must also be set when Speed is set to either 10 or 100.

TxDescriptors
Valid Range: 80-256 for 82542 and 82543-based adapters
             80-4096 for 82540, 82544, 82545, and 82546-based adapters
Default Value: 256
    This value is the number of transmit descriptors allocated by the driver.
    Increasing this value allows the driver to queue more transmits. Each 
    descriptor is 16 bytes.

TxIntDelay
Valid Range: 0-65535 (0=off)
Default Value: 64
    This value delays the generation of transmit interrupts in units of 
    1.024 microseconds.  Transmit interrupt reduction can improve CPU
    efficiency if properly tuned for specific network traffic. If the
    system is reporting dropped transmits, this value may be set too high
    causing the driver to run out of available transmit descriptors.

TxAbsIntDelay (82540, 82545, and 82546-based adapters only)
Valid Range: 0-65535 (0=off)
Default Value: 64
    This value, in units of 1.024 microseconds, limits the delay in which a 
    transmit interrupt is generated. Useful only if TxIntDelay is non-zero, 
    this value ensures that an interrupt is generated after the initial 
    packet is sent on the wire within the set amount of time.  Proper tuning,
    along with TxIntDelay, may improve traffic throughput in specific 
    network conditions.

XsumRX (not available on the PRO/1000 Gigabit Server Adapter)
Valid Range: 0-1
Default Value: 1
    A value of '1' indicates that the driver should enable IP checksum
    offload for received packets (both UDP and TCP) to the adapter hardware.


Speed and Duplex Configuration
==============================

Three keywords are used to control the speed and duplex configuration. These 
keywords are Speed, Duplex, and AutoNeg.

If the board uses a fiber interface, these keywords are ignored, and the 
fiber interface board only links at 1000 Mbps full-duplex.

For copper-based boards, the keywords interact as follows:

  The default operation is auto-negotiate. The board advertises all supported
  speed and duplex combinations, and it links at the highest common speed and
  duplex mode IF the link partner is set to auto-negotiate.

  If Speed = 1000, limited auto-negotiation is enabled and only 1000 Mbps is
  advertised (The 1000BaseT spec requires auto-negotiation.)

  If Speed = 10 or 100, then both Speed and Duplex must be set. Auto-
  negotiation is disabled, and the AutoNeg parameter is ignored. Partner MUST
  also be forced.

The AutoNeg parameter is used when more control is required over the auto-
negotiation process.  When this parameter is used, Speed and Duplex must not 
be specified.  This parameter is a bitmap that specifies which speed and 
duplex settings are advertised to the link partner.

Bit            7      6      5       4       3      2      1       0
Speed (Mbps)   N/A    N/A    1000    N/A     100    100    10      10
Duplex                       Full            Full   Half   Full    Half

Note that setting AutoNeg does not guarantee that the board will link at the 
highest specified speed or duplex mode, but the board will link at the 
highest possible speed/duplex of the link partner IF the link partner is also
set to auto-negotiate. If the link partner is forced speed/duplex, the 
adapter MUST be forced to the same speed/duplex.


Additional Configurations
=========================

Configuring a network driver to load properly when the system is started is
distribution dependent. Typically, the configuration process involves adding
an alias line to /etc/modules.conf as well as editing other system startup 
scripts and/or configuration files. Many popular Linux distributions ship 
with tools to make these changes for you. To learn the proper way to 
configure a network device for your system, refer to your distribution 
documentation. If during this process you are asked for the driver or module 
name, the name for the Linux Base Driver for the Intel PRO/1000 Family of 
Adapters is e1000.

Link messages will not be displayed to the console if the distribution is 
restricting system messages. In order to see network driver link messages on 
your console, set dmesg to at least seven by entering the following:

     dmesg -n 7


  Jumbo Frames
  ------------

  The driver supports Jumbo Frames for all adapters except 82542-based 
  adapters.  Jumbo Frames support is enabled by changing the MTU to a value 
  larger than the default of 1500.  Use the ifconfig command to increase the 
  MTU size. For example:

        ifconfig ethx mtu 9000 up


Known Issues
============

  Jumbo Frames System Requirement
  -------------------------------

  Memory allocation failures have been observed on Linux systems with 64 MB 
  of RAM or less that are running Jumbo Frames. If you are using Jumbo 
  Frames, your system may require more than the advertised minimum 
  requirement of 64 MB of system memory.


Troubleshooting
===============

NOTE: For distribution-specific information, see the ldistrib.txt file 
      included in the driver tar.

When trying to compile the driver by running make install, the following
error may occur: 

    "Linux kernel source not configured - missing version.h"

To solve this issue, create the version.h file by going to the Linux source 
tree and entering:

    make include/linux/version.h.


Support
=======

For general information, 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 [e-mail].


License
=======

This software program is released under the terms of a license agreement 
between you ('Licensee') and Intel. Do not use or load this software or any 
associated materials (collectively, the 'Software') until you have carefully 
read the full terms and conditions of the LICENSE located in this software 
package. By loading or using the Software, you agree to the terms of this 
Agreement. If you do not agree with the terms of this Agreement, do not 
install or use the Software.

* Other names and brands may be claimed as the property of others.