Linux* Base Driver for the Intel(R) PRO/1000 Family of Adapters
===============================================================
-November 15, 2005
+November 17, 2004
Contents
===============
This file describes the Linux* Base Driver for the Intel(R) PRO/1000 Family
-of Adapters. This driver includes support for Itanium(R)2-based systems.
+of Adapters, version 5.x.x.
-For questions related to hardware requirements, refer to the documentation
-supplied with your Intel PRO/1000 adapter. All hardware requirements listed
+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 Linux.
-The following features are now available in supported kernels:
- - Native VLANs
- - Channel Bonding (teaming)
- - SNMP
-
-Channel Bonding documentation can be found in the Linux kernel source:
-/Documentation/networking/bonding.txt
-
-The driver information previously displayed in the /proc filesystem is not
-supported in this release. Alternatively, you can use ethtool (version 1.6
-or later), lspci, and ifconfig to obtain the same information.
-
-Instructions on updating ethtool can be found in the section "Additional
-Configurations" later in this document.
-
+Native VLANs are now available with supported kernels.
Identifying Your Adapter
========================
-For more information on how to identify your adapter, go to the Adapter &
+For more information on how to identify your adapter, go to the Adapter &
Driver ID Guide at:
http://support.intel.com/support/network/adapter/pro100/21397.htm
-For the latest Intel network drivers for Linux, refer to the following
-website. In the search field, enter your adapter name or type, or use the
+For the latest Intel network drivers for Linux, refer to the following
+website. In the search field, enter your adapter name or type, or use the
networking link on the left to search for your adapter:
http://downloadfinder.intel.com/scripts-df/support_intel.asp
+Command Line Parameters
+=======================
-Command Line Parameters =======================
-
-If the driver is built as a module, the following optional parameters
-are used by entering them on the command line with the modprobe or insmod
-command using this syntax:
+If the driver is built as a module, the following optional parameters are
+used by entering them on the command line with the modprobe or insmod command
+using this syntax:
modprobe e1000 [<option>=<VAL1>,<VAL2>,...]
- insmod e1000 [<option>=<VAL1>,<VAL2>,...]
+ insmod e1000 [<option>=<VAL1>,<VAL2>,...]
For example, with two PRO/1000 PCI adapters, entering:
insmod e1000 TxDescriptors=80,128
-loads the e1000 driver with 80 TX descriptors for the first adapter and 128
-TX descriptors for the second adapter.
+loads the e1000 driver with 80 TX descriptors for the first adapter and 128 TX
+descriptors for the second adapter.
The default value for each parameter is generally the recommended setting,
-unless otherwise noted.
-
-NOTES: For more information about the AutoNeg, Duplex, and Speed
- parameters, see the "Speed and Duplex Configuration" section in
- this document.
+unless otherwise noted. Also, if the driver is statically built into the
+kernel, the driver is loaded with the default values for all the parameters.
+Ethtool can be used to change some of the parameters at runtime.
- For more information about the InterruptThrottleRate,
- RxIntDelay, TxIntDelay, RxAbsIntDelay, and TxAbsIntDelay
- parameters, see the application note at:
- http://www.intel.com/design/network/applnots/ap450.htm
+ NOTES: For more information about the AutoNeg, Duplex, and Speed
+ parameters, see the "Speed and Duplex Configuration" section in
+ this document.
- A descriptor describes a data buffer and attributes related to
- the data buffer. This information is accessed by the hardware.
+ For more information about the InterruptThrottleRate, RxIntDelay,
+ TxIntDelay, RxAbsIntDelay, and TxAbsIntDelay parameters, see the
+ application note at:
+ http://www.intel.com/design/network/applnots/ap450.htm
+ A descriptor describes a data buffer and attributes related to the
+ data buffer. This information is accessed by the hardware.
-AutoNeg
--------
-(Supported only on adapters with copper connections)
-Valid Range: 0x01-0x0F, 0x20-0x2F
+AutoNeg (adapters using copper connections only)
+Valid Range: 0x01-0x0F, 0x20-0x2F
Default Value: 0x2F
-
-This parameter is a bit mask that specifies which speed and duplex
-settings the board advertises. When this parameter is used, the Speed
-and Duplex parameters must not be specified.
-
-NOTE: Refer to the Speed and Duplex section of this readme for more
- information on the AutoNeg parameter.
-
-
-Duplex
-------
-(Supported only on adapters with copper connections)
-Valid Range: 0-2 (0=auto-negotiate, 1=half, 2=full)
+ This parameter is a bit mask that specifies which speed and duplex
+ settings the board advertises. When this parameter is used, the Speed and
+ Duplex parameters must not be specified.
+ NOTE: Refer to the Speed and Duplex section of this readme for more
+ information on the AutoNeg parameter.
+
+Duplex (adapters using copper connections only)
+Valid Range: 0-2 (0=auto-negotiate, 1=half, 2=full)
Default Value: 0
-
-Defines the direction in which data is allowed to flow. Can be either
-one or two-directional. If both Duplex and the link partner are set to
-auto-negotiate, the board auto-detects the correct duplex. If the link
-partner is forced (either full or half), Duplex defaults to half-duplex.
-
+ Defines the direction in which data is allowed to flow. Can be either one
+ or two-directional. If both Duplex and the link partner are set to auto-
+ negotiate, the board auto-detects the correct duplex. If the link partner
+ is forced (either full or half), Duplex defaults to half-duplex.
FlowControl
-----------
-Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx)
-Default Value: Reads flow control settings from the EEPROM
-
-This parameter controls the automatic generation(Tx) and response(Rx)
-to Ethernet PAUSE frames.
-
+Valid Range: 0-3 (0=none, 1=Rx only, 2=Tx only, 3=Rx&Tx)
+Default: Read flow control settings from the EEPROM
+ This parameter controls the automatic generation(Tx) and response(Rx) to
+ Ethernet PAUSE frames.
InterruptThrottleRate
----------------------
-(not supported on Intel 82542, 82543 or 82544-based adapters)
-Valid Range: 100-100000 (0=off, 1=dynamic)
+Valid Range: 100-100000 (0=off, 1=dynamic)
Default Value: 8000
-
-This value represents the maximum number of interrupts per second the
-controller generates. InterruptThrottleRate is another setting used in
-interrupt moderation. Dynamic mode uses a heuristic algorithm to adjust
-InterruptThrottleRate based on the current traffic load.
-
-NOTE: InterruptThrottleRate takes precedence over the TxAbsIntDelay and
- RxAbsIntDelay parameters. In other words, minimizing the receive
- and/or transmit absolute delays does not force the controller to
- generate more interrupts than what the Interrupt Throttle Rate
- allows.
-
-CAUTION: If you are using the Intel PRO/1000 CT Network Connection
- (controller 82547), setting InterruptThrottleRate to a value
- greater than 75,000, may hang (stop transmitting) adapters
- under certain network conditions. If this occurs a NETDEV
- WATCHDOG 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 InterruptThrottleRate is set no greater
- than 75,000 and is not set to 0.
-
-NOTE: When e1000 is loaded with default settings and multiple adapters
- are in use simultaneously, the CPU utilization may increase non-
- linearly. In order to limit the CPU utilization without impacting
- the overall throughput, we recommend that you load the driver as
- follows:
-
- insmod e1000.o InterruptThrottleRate=3000,3000,3000
-
- This sets the InterruptThrottleRate to 3000 interrupts/sec for
- the first, second, and third instances of the driver. The range
- of 2000 to 3000 interrupts per second works on a majority of
- systems and is a good starting point, but the optimal value will
- be platform-specific. If CPU utilization is not a concern, use
- RX_POLLING (NAPI) and default driver settings.
-
+ This value represents the maximum number of interrupts per second the
+ controller generates. InterruptThrottleRate is another setting used in
+ interrupt moderation. Dynamic mode uses a heuristic algorithm to adjust
+ InterruptThrottleRate based on the current traffic load.
+Un-supported Adapters: InterruptThrottleRate is NOT supported by 82542, 82543
+ or 82544-based adapters.
+
+ NOTE: InterruptThrottleRate takes precedence over the TxAbsIntDelay and
+ RxAbsIntDelay parameters. In other words, minimizing the receive
+ and/or transmit absolute delays does not force the controller to
+ generate more interrupts than what the Interrupt Throttle Rate
+ allows.
+ CAUTION: If you are using the Intel PRO/1000 CT Network Connection
+ (controller 82547), setting InterruptThrottleRate to a value
+ greater than 75,000, may hang (stop transmitting) adapters under
+ certain network conditions. If this occurs a NETDEV WATCHDOG
+ 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 InterruptThrottleRate is set no greater than 75,000 and is
+ not set to 0.
+ NOTE: When e1000 is loaded with default settings and multiple adapters are
+ in use simultaneously, the CPU utilization may increase non-linearly.
+ In order to limit the CPU utilization without impacting the overall
+ throughput, we recommend that you load the driver as follows:
+
+ insmod e1000.o InterruptThrottleRate=3000,3000,3000
+
+ This sets the InterruptThrottleRate to 3000 interrupts/sec for the
+ first, second, and third instances of the driver. The range of 2000 to
+ 3000 interrupts per second works on a majority of systems and is a
+ good starting point, but the optimal value will be platform-specific.
+ If CPU utilization is not a concern, use RX_POLLING (NAPI) and default
+ driver settings.
RxDescriptors
--------------
-Valid Range: 80-256 for 82542 and 82543-based adapters
- 80-4096 for all other supported adapters
+Valid Range: 80-256 for 82542 and 82543-based adapters
+ 80-4096 for all other supported adapters
Default Value: 256
+ This value is the number of receive descriptors allocated by the driver.
+ Increasing this value allows the driver to buffer more incoming packets.
+ Each descriptor is 16 bytes. A receive buffer is allocated for each
+ descriptor and can either be 2048 or 4096 bytes long, depending on the MTU
-This value specifies the number of receive descriptors allocated by the
-driver. Increasing this value allows the driver to buffer more incoming
-packets. Each descriptor is 16 bytes. A receive buffer is also
-allocated for each descriptor and is 2048.
+ setting. An incoming packet can span one or more receive descriptors.
+ The maximum MTU size is 16110.
+ NOTE: MTU designates the frame size. It only needs to be set for Jumbo
+ Frames.
+ NOTE: Depending on the available system resources, the request for a
+ higher number of receive descriptors may be denied. In this case,
+ use a lower number.
RxIntDelay
-----------
-Valid Range: 0-65535 (0=off)
+Valid Range: 0-65535 (0=off)
Default Value: 0
-
-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 may
- hang (stop transmitting) under certain network conditions. If
- this occurs a NETDEV WATCHDOG 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
--------------
-(This parameter is supported only on 82540, 82545 and later adapters.)
-Valid Range: 0-65535 (0=off)
+ 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 may
+ hang (stop transmitting) under certain network conditions. If
+ this occurs a NETDEV WATCHDOG 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 later 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
-receive 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
------
-(This parameter is supported only on adapters with copper connections.)
+ This value, in units of 1.024 microseconds, limits the delay in which a
+ receive 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 should also be set when Speed is set to either 10 or 100.
-
+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 should 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 all other supported adapters
+Valid Range: 80-256 for 82542 and 82543-based adapters
+ 80-4096 for all other supported 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.
-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.
-
-NOTE: Depending on the available system resources, the request for a
- higher number of transmit descriptors may be denied. In this case,
- use a lower number.
-
+ NOTE: Depending on the available system resources, the request for a
+ higher number of transmit descriptors may be denied. In this case,
+ use a lower number.
TxIntDelay
-----------
-Valid Range: 0-65535 (0=off)
+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
--------------
-(This parameter is supported only on 82540, 82545 and later adapters.)
-Valid Range: 0-65535 (0=off)
+ 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 later 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
-------
-(This parameter is NOT supported on the 82542-based adapter.)
-Valid Range: 0-1
+ 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 82542-based 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.
-
+ 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.
+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
+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.
+ 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 = 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 should be set. Auto-
- negotiation is disabled, and the AutoNeg parameter is ignored. Partner
- SHOULD also be forced.
-
-The AutoNeg parameter is used when more control is required over the
-auto-negotiation process. It should be used when you wish to control which
-speed and duplex combinations are advertised during the auto-negotiation
-process.
-
-The parameter may be specified as either a decimal or hexidecimal value as
-determined by the bitmap below.
+ negotiation is disabled, and the AutoNeg parameter is ignored. Partner SHOULD
+ also be forced.
-Bit position 7 6 5 4 3 2 1 0
-Decimal Value 128 64 32 16 8 4 2 1
-Hex value 80 40 20 10 8 4 2 1
-Speed (Mbps) N/A N/A 1000 N/A 100 100 10 10
-Duplex Full Full Half Full Half
+The AutoNeg parameter is used when more control is required over the auto-
+negotiation process. When this parameter is used, Speed and Duplex parameters
+must not be specified. The following table describes supported values for the
+AutoNeg parameter:
-Some examples of using AutoNeg:
+Speed (Mbps) 1000 100 100 10 10
+Duplex Full Full Half Full Half
+Value (in base 16) 0x20 0x08 0x04 0x02 0x01
- modprobe e1000 AutoNeg=0x01 (Restricts autonegotiation to 10 Half)
- modprobe e1000 AutoNeg=1 (Same as above)
- modprobe e1000 AutoNeg=0x02 (Restricts autonegotiation to 10 Full)
- modprobe e1000 AutoNeg=0x03 (Restricts autonegotiation to 10 Half or 10 Full)
- modprobe e1000 AutoNeg=0x04 (Restricts autonegotiation to 100 Half)
- modprobe e1000 AutoNeg=0x05 (Restricts autonegotiation to 10 Half or 100
- Half)
- modprobe e1000 AutoNeg=0x020 (Restricts autonegotiation to 1000 Full)
- modprobe e1000 AutoNeg=32 (Same as above)
+Example: insmod e1000 AutoNeg=0x03, loads e1000 and specifies (10 full duplex,
+10 half duplex) for negotiation with the peer.
-Note that when this parameter is used, Speed and Duplex must not be specified.
-
-If the link partner is forced to a specific speed and duplex, then this
-parameter should not be used. Instead, use the Speed and Duplex parameters
-previously mentioned to force the adapter to the same speed and duplex.
+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 the Driver on Different Distributions
-------------------------------------------------
- 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 or /etc/modprobe.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.
+ 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.
- As an example, if you install the e1000 driver for two PRO/1000 adapters
- (eth0 and eth1) and set the speed and duplex to 10full and 100half, add
- the following to modules.conf or or modprobe.conf:
+ As an example, if you install the e1000 driver for two PRO/1000 adapters
+ (eth0 and eth1) and set the speed and duplex to 10full and 100half, add the
+ following to modules.conf:
alias eth0 e1000
alias eth1 e1000
Viewing Link Messages
---------------------
- 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 eight by entering the following:
+ 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 eight by entering the following:
dmesg -n 8
Jumbo Frames
------------
- The driver supports Jumbo Frames for all adapters except 82542 and
- 82573-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 eth<x> mtu 9000 up
-
- This setting is not saved across reboots. It can be made permanent if
- you add:
-
- MTU=9000
+ 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:
- to the file /etc/sysconfig/network-scripts/ifcfg-eth<x>. This example
- applies to the Red Hat distributions; other distributions may store this
- setting in a different location.
+ ifconfig ethx mtu 9000 up
- Notes:
+ The maximum MTU setting for Jumbo Frames is 16110. This value coincides
+ with the maximum Jumbo Frames size of 16128.
- - To enable Jumbo Frames, increase the MTU size on the interface beyond
- 1500.
- - The maximum MTU setting for Jumbo Frames is 16110. This value coincides
- with the maximum Jumbo Frames size of 16128.
- - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or
- loss of link.
- - Some Intel gigabit adapters that support Jumbo Frames have a frame size
- limit of 9238 bytes, with a corresponding MTU size limit of 9216 bytes.
- The adapters with this limitation are based on the Intel 82571EB and
- 82572EI controllers, which correspond to these product names:
- Intel® PRO/1000 PT Dual Port Server Adapter
- Intel® PRO/1000 PF Dual Port Server Adapter
- Intel® PRO/1000 PT Server Adapter
- Intel® PRO/1000 PT Desktop Adapter
- Intel® PRO/1000 PF Server Adapter
+ NOTE: Jumbo Frames are supported at 1000 Mbps only. Using Jumbo Frames at
+ 10 or 100 Mbps may result in poor performance or loss of link.
- - The Intel PRO/1000 PM Network Connection does not support jumbo frames.
+ NOTE: MTU designates the frame size. To enable Jumbo Frames, increase the
+ MTU size on the interface beyond 1500.
Ethtool
-------
version 1.6 or later is required for this functionality.
The latest release of ethtool can be found from
- http://sourceforge.net/projects/gkernel.
+ http://sf.net/projects/gkernel.
- NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support
- for a more complete ethtool feature set can be enabled by upgrading
- ethtool to ethtool-1.8.1.
+ NOTE: Ethtool 1.6 only supports a limited set of ethtool options. Support
+ for a more complete ethtool feature set can be enabled by upgrading
+ ethtool to ethtool-1.8.1.
Enabling Wake on LAN* (WoL)
---------------------------
WoL is configured through the Ethtool* utility. Ethtool is included with
- all versions of Red Hat after Red Hat 7.2. For other Linux distributions,
- download and install Ethtool from the following website:
+ all versions of Red Hat after Red Hat 7.2. For other Linux distributions,
+ download and install Ethtool from the following website:
http://sourceforge.net/projects/gkernel.
- For instructions on enabling WoL with Ethtool, refer to the website listed
+ For instructions on enabling WoL with Ethtool, refer to the website listed
above.
- WoL will be enabled on the system during the next shut down or reboot.
- For this driver version, in order to enable WoL, the e1000 driver must be
+ WoL will be enabled on the system during the next shut down or reboot.
+ For this driver version, in order to enable WoL, the e1000 driver must be
loaded when shutting down or rebooting the system.
NAPI
----
NAPI (Rx polling mode) is supported in the e1000 driver. NAPI is enabled
- or disabled based on the configuration of the kernel. To override
- the default, use the following compile-time flags.
-
- To enable NAPI, compile the driver module, passing in a configuration option:
-
- make CFLAGS_EXTRA=-DE1000_NAPI install
-
- To disable NAPI, compile the driver module, passing in a configuration option:
-
- make CFLAGS_EXTRA=-DE1000_NO_NAPI install
+ or disabled based on the configuration of the kernel.
See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI.
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.
-
- Performance Degradation with Jumbo Frames
- -----------------------------------------
-
- Degradation in throughput performance may be observed in some Jumbo frames
- environments. If this is observed, increasing the application's socket
- buffer size and/or increasing the /proc/sys/net/ipv4/tcp_*mem entry values
- may help. See the specific application manual and
- /usr/src/linux*/Documentation/
- networking/ip-sysctl.txt for more details.
-
- Jumbo frames on Foundry BigIron 8000 switch
- -------------------------------------------
- There is a known issue using Jumbo frames when connected to a Foundry
- BigIron 8000 switch. This is a 3rd party limitation. If you experience
- loss of packets, lower the MTU size.
-
- Multiple Interfaces on Same Ethernet Broadcast Network
- ------------------------------------------------------
-
- Due to the default ARP behavior on Linux, it is not possible to have
- one system on two IP networks in the same Ethernet broadcast domain
- (non-partitioned switch) behave as expected. All Ethernet interfaces
- will respond to IP traffic for any IP address assigned to the system.
- This results in unbalanced receive traffic.
-
- If you have multiple interfaces in a server, either turn on ARP
- filtering by entering:
-
- echo 1 > /proc/sys/net/ipv4/conf/all/arp_filter
- (this only works if your kernel's version is higher than 2.4.5),
-
- NOTE: This setting is not saved across reboots. The configuration
- change can be made permanent by adding the line:
- net.ipv4.conf.all.arp_filter = 1
- to the file /etc/sysctl.conf
-
- or,
-
- install the interfaces in separate broadcast domains (either in
- different switches or in a switch partitioned to VLANs).
-
- 82541/82547 can't link or are slow to link with some link partners
- -----------------------------------------------------------------
-
- There is a known compatibility issue with 82541/82547 and some
- low-end switches where the link will not be established, or will
- be slow to establish. In particular, these switches are known to
- be incompatible with 82541/82547:
-
- Planex FXG-08TE
- I-O Data ETG-SH8
-
- To workaround this issue, the driver can be compiled with an override
- of the PHY's master/slave setting. Forcing master or forcing slave
- mode will improve time-to-link.
-
- # make EXTRA_CFLAGS=-DE1000_MASTER_SLAVE=<n>
-
- Where <n> is:
-
- 0 = Hardware default
- 1 = Master mode
- 2 = Slave mode
- 3 = Auto master/slave
-
- Disable rx flow control with ethtool
- ------------------------------------
-
- In order to disable receive flow control using ethtool, you must turn
- off auto-negotiation on the same command line.
-
- For example:
-
- ethtool -A eth? autoneg off rx off
+ 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.
Support
http://support.intel.com
- or the Intel Wired Networking project hosted by Sourceforge at:
-
- http://sourceforge.net/projects/e1000
-
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 e1000-devel@lists.sourceforge.net
+kernel with a supported adapter, email the specific information related to
+the issue to linux.nics@intel.com.
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 file COPYING 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
+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.
git://git.onelab.eu / linux-2.6.git / blobdiff