Linux* Base Driver for the Intel(R) PRO/1000 Family of Adapters
===============================================================
-November 17, 2004
+November 15, 2005
Contents
===============
This file describes the Linux* Base Driver for the Intel(R) PRO/1000 Family
-of Adapters, version 5.x.x.
+of Adapters. This driver includes support for Itanium(R)2-based systems.
-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.
-Native VLANs are now available with supported kernels.
+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.
+
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
-=======================
-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:
+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:
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. 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.
+unless otherwise noted.
+
+NOTES: For more information about the AutoNeg, Duplex, and Speed
+ parameters, see the "Speed and Duplex Configuration" section in
+ this document.
- NOTES: For more information about the AutoNeg, Duplex, and Speed
- parameters, see the "Speed and Duplex Configuration" section in
- this document.
+ 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
- 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.
- A descriptor describes a data buffer and attributes related to the
- data buffer. This information is accessed by the hardware.
-AutoNeg (adapters using copper connections only)
-Valid Range: 0x01-0x0F, 0x20-0x2F
+AutoNeg
+-------
+(Supported only on adapters with copper connections)
+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 (adapters using copper connections only)
-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
+------
+(Supported only on adapters with copper connections)
+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: Read 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 Value: Reads flow control settings from the EEPROM
+
+This parameter controls the automatic generation(Tx) and response(Rx)
+to Ethernet PAUSE frames.
+
InterruptThrottleRate
-Valid Range: 100-100000 (0=off, 1=dynamic)
+---------------------
+(not supported on Intel 82542, 82543 or 82544-based adapters)
+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.
-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.
+
+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.
+
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
- setting. An incoming packet can span one or more receive descriptors.
- The maximum MTU size is 16110.
+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.
- 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 (82540, 82545 and later adapters only)
-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
+-------------
+(This parameter is supported only on 82540, 82545 and later adapters.)
+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 (adapters using copper connections only)
+
+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.)
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.
- 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.
+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.
+
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 (82540, 82545 and later adapters only)
-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
+-------------
+(This parameter is supported only on 82540, 82545 and later adapters.)
+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 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
+------
+(This parameter is NOT supported 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.
+ 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.
-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:
+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
-Speed (Mbps) 1000 100 100 10 10
-Duplex Full Full Half Full Half
-Value (in base 16) 0x20 0x08 0x04 0x02 0x01
+Some examples of using AutoNeg:
-Example: insmod e1000 AutoNeg=0x03, loads e1000 and specifies (10 full duplex,
-10 half duplex) for negotiation with the peer.
+ 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)
-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.
+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.
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 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 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.
- 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:
+ 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:
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-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:
+ 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
- ifconfig ethx mtu 9000 up
+ 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.
- The maximum MTU setting for Jumbo Frames is 16110. This value coincides
- with the maximum Jumbo Frames size of 16128.
+ Notes:
- 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.
+ - 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
+ - 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://sf.net/projects/gkernel.
+ http://sourceforge.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.
+ 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
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.
+ 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
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 linux.nics@intel.com.
+kernel with a supported adapter, email the specific information related
+to the issue to e1000-devel@lists.sourceforge.net
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
+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
install or use the Software.
* Other names and brands may be claimed as the property of others.
projects / linux-2.6 / commitdiff