Linux* Base Driver for the Intel(R) PRO/1000 Family of Adapters
===============================================================
-January 8, 2003
+September 26, 2006
Contents
========
- In This Release
-- Supported Adapters
+- Identifying Your Adapter
+- Building and Installation
- Command Line Parameters
- Speed and Duplex Configuration
- Additional Configurations
===============
This file describes the Linux* Base Driver for the Intel(R) PRO/1000 Family
-of Adapters, version 5.0.x. This driver includes support for
-Itanium(TM)-based systems.
+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
+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
-Supported Adapters
-==================
+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.
-The following Intel network adapters are compatible with the drivers in this
-release:
+Instructions on updating ethtool can be found in the section "Additional
+Configurations" later in this document.
- Controller Adapter Name Board IDs
- ---------- ------------ ---------
+NOTE: The Intel(R) 82562v 10/100 Network Connection only provides 10/100
+support.
- 82542 PRO/1000 Gigabit Server Adapter 700262-xxx, 717037-xxx
- 82543 PRO/1000 F Server Adapter 738640-xxx, A38888-xxx
+Identifying Your Adapter
+========================
- 82543 PRO/1000 T Server Adapter A19845-xxx, A33948-xxx
-
- 82544 PRO/1000 XT Server Adapter A51580-xxx
-
- 82544 PRO/1000 XF Server Adapter A50484-xxx
-
- 82544 PRO/1000 T Desktop Adapter A62947-xxx
-
- 82540 PRO/1000 MT Desktop Adapter A78408-xxx
- 82541 C91016-xxx
-
- 82545 PRO/1000 MT Server Adapter A92165-xxx
-
- 82546 PRO/1000 MT Dual Port Server Adapter A92111-xxx
-
- 82545 PRO/1000 MF Server Adapter A91622-xxx
-
- 82545 PRO/1000 MF Server Adapter(LX) A91624-xxx
-
- 82546 PRO/1000 MF Dual Port Server Adapter A91620-xxx
-
-
-
-To verify your Intel adapter is supported, find the board ID number on the
-adapter. Look for a label that has a barcode and a number in the format
-A12345-001. Match this to the list of numbers above.
-
-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
+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
+If the driver is built as a module, the following optional parameters
+are used by entering them on the command line with the modprobe command
using this syntax:
modprobe e1000 [<option>=<VAL1>,<VAL2>,...]
- insmod e1000 [<option>=<VAL1>,<VAL2>,...]
-
For example, with two PRO/1000 PCI adapters, entering:
- insmod e1000 TxDescriptors=80,128
+ modprobe e1000 TxDescriptors=80,128
-loads the e1000 driver with 80 TX resources for the first adapter and 128 TX
-resources 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.
-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
+ 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.
-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 the speed and duplex settings
+advertised by the adapter. 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 by 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.
+
+This 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)
-Default Value: 1
- 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.
+---------------------
+(not supported on Intel(R) 82542, 82543 or 82544-based adapters)
+Valid Range: 0,1,3,100-100000 (0=off, 1=dynamic, 3=dynamic conservative)
+Default Value: 3
+
+The driver can limit the amount of interrupts per second that the adapter
+will generate for incoming packets. It does this by writing a value to the
+adapter that is based on the maximum amount of interrupts that the adapter
+will generate per second.
+
+Setting InterruptThrottleRate to a value greater or equal to 100
+will program the adapter to send out a maximum of that many interrupts
+per second, even if more packets have come in. This reduces interrupt
+load on the system and can lower CPU utilization under heavy load,
+but will increase latency as packets are not processed as quickly.
+
+The default behaviour of the driver previously assumed a static
+InterruptThrottleRate value of 8000, providing a good fallback value for
+all traffic types,but lacking in small packet performance and latency.
+The hardware can handle many more small packets per second however, and
+for this reason an adaptive interrupt moderation algorithm was implemented.
+
+Since 7.3.x, the driver has two adaptive modes (setting 1 or 3) in which
+it dynamically adjusts the InterruptThrottleRate value based on the traffic
+that it receives. After determining the type of incoming traffic in the last
+timeframe, it will adjust the InterruptThrottleRate to an appropriate value
+for that traffic.
+
+The algorithm classifies the incoming traffic every interval into
+classes. Once the class is determined, the InterruptThrottleRate value is
+adjusted to suit that traffic type the best. There are three classes defined:
+"Bulk traffic", for large amounts of packets of normal size; "Low latency",
+for small amounts of traffic and/or a significant percentage of small
+packets; and "Lowest latency", for almost completely small packets or
+minimal traffic.
+
+In dynamic conservative mode, the InterruptThrottleRate value is set to 4000
+for traffic that falls in class "Bulk traffic". If traffic falls in the "Low
+latency" or "Lowest latency" class, the InterruptThrottleRate is increased
+stepwise to 20000. This default mode is suitable for most applications.
+
+For situations where low latency is vital such as cluster or
+grid computing, the algorithm can reduce latency even more when
+InterruptThrottleRate is set to mode 1. In this mode, which operates
+the same as mode 3, the InterruptThrottleRate will be increased stepwise to
+70000 for traffic in class "Lowest latency".
+
+Setting InterruptThrottleRate to 0 turns off any interrupt moderation
+and may improve small packet latency, but is generally not suitable
+for bulk throughput traffic.
+
+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(R) 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:
+
+ modprobe e1000 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.
+
- 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.
RxDescriptors
-Valid Range: 80-256 for 82542 and 82543-based adapters
- 80-4096 for 82540, 82544, 82545, and 82546-based adapters
-Default Value: 80
- 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 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.
+-------------
+Valid Range: 80-256 for 82542 and 82543-based adapters
+ 80-4096 for all other supported adapters
+Default Value: 256
+
+This value specifies the number of receive buffer descriptors allocated
+by the driver. Increasing this value allows the driver to buffer more
+incoming packets, at the expense of increased system memory utilization.
+
+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. 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 82546-based 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
- 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)
+
+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 82540, 82544, 82545, and 82546-based 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.
+
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 82546-based 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.
+ 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. 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.
+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.
-Bit 7 6 5 4 3 2 1 0
+The parameter may be specified as either a decimal or hexadecimal value as
+determined by the bitmap below.
+
+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
-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.
+Some examples of using AutoNeg:
+
+ 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 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 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(R) 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:
+
+ alias eth0 e1000
+ alias eth1 e1000
+ options e1000 Speed=10,100 Duplex=2,1
+
+ 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:
+
+ dmesg -n 8
+
+ NOTE: This setting is not saved across reboots.
+
Jumbo Frames
------------
+ 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
+
+ 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.
+
+ Notes:
+
+ - 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.
- 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:
+ - Using Jumbo Frames at 10 or 100 Mbps may result in poor performance or
+ loss of link.
- ifconfig ethx mtu 9000 up
+ - 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(R) 82571EB,
+ 82572EI, 82573L and 80003ES2LAN controller. These correspond to the
+ following product names:
+ Intel(R) PRO/1000 PT Server Adapter
+ Intel(R) PRO/1000 PT Desktop Adapter
+ Intel(R) PRO/1000 PT Network Connection
+ Intel(R) PRO/1000 PT Dual Port Server Adapter
+ Intel(R) PRO/1000 PT Dual Port Network Connection
+ Intel(R) PRO/1000 PF Server Adapter
+ Intel(R) PRO/1000 PF Network Connection
+ Intel(R) PRO/1000 PF Dual Port Server Adapter
+ Intel(R) PRO/1000 PB Server Connection
+ Intel(R) PRO/1000 PL Network Connection
+ Intel(R) PRO/1000 EB Network Connection with I/O Acceleration
+ Intel(R) PRO/1000 EB Backplane Connection with I/O Acceleration
+ Intel(R) PRO/1000 PT Quad Port Server Adapter
- The maximum MTU setting for Jumbo Frames is 16110. This value coincides
- with the maximum Jumbo Frames size of 16128.
+ - Adapters based on the Intel(R) 82542 and 82573V/E controller do not
+ support Jumbo Frames. These correspond to the following product names:
+ Intel(R) PRO/1000 Gigabit Server Adapter
+ Intel(R) PRO/1000 PM Network Connection
- 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 following adapters do not support Jumbo Frames:
+ Intel(R) 82562V 10/100 Network Connection
+ Intel(R) 82566DM Gigabit Network Connection
+ Intel(R) 82566DC Gigabit Network Connection
+ Intel(R) 82566MM Gigabit Network Connection
+ Intel(R) 82566MC Gigabit Network Connection
+ Intel(R) 82562GT 10/100 Network Connection
+ Intel(R) 82562G 10/100 Network Connection
+
+
+ Ethtool
+ -------
+ The driver utilizes the ethtool interface for driver configuration and
+ diagnostics, as well as displaying statistical information. 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.
+
+ 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:
+ http://sourceforge.net/projects/gkernel.
+
+ 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
+ loaded when shutting down or rebooting the system.
+
+ Wake On LAN is only supported on port A for the following devices:
+ Intel(R) PRO/1000 PT Dual Port Network Connection
+ Intel(R) PRO/1000 PT Dual Port Server Connection
+ Intel(R) PRO/1000 PT Dual Port Server Adapter
+ Intel(R) PRO/1000 PF Dual Port Server Adapter
+ Intel(R) PRO/1000 PT Quad Port Server Adapter
+
+ 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
+
+ See www.cyberus.ca/~hadi/usenix-paper.tgz for more information on NAPI.
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.
+Dropped Receive Packets on Half-duplex 10/100 Networks
+------------------------------------------------------
+If you have an Intel PCI Express adapter running at 10mbps or 100mbps, half-
+duplex, you may observe occasional dropped receive packets. There are no
+workarounds for this problem in this network configuration. The network must
+be updated to operate in full-duplex, and/or 1000mbps only.
+
+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.
+
+Allocating Rx Buffers when Using Jumbo Frames
+---------------------------------------------
+Allocating Rx buffers when using Jumbo Frames on 2.6.x kernels may fail if
+the available memory is heavily fragmented. This issue may be seen with PCI-X
+adapters or with packet split disabled. This can be reduced or eliminated
+by changing the amount of available memory for receive buffer allocation, by
+increasing /proc/sys/vm/min_free_kbytes.
+
+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 CFLAGS_EXTRA=-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
+
+Unplugging network cable while ethtool -p is running
+----------------------------------------------------
+In kernel versions 2.5.50 and later (including 2.6 kernel), unplugging
+the network cable while ethtool -p is running will cause the system to
+become unresponsive to keyboard commands, except for control-alt-delete.
+Restarting the system appears to be the only remedy.
Support
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 linux.nics@intel.com.
+or the Intel Wired Networking project hosted by Sourceforge at:
+ http://sourceforge.net/projects/e1000
-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.
+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.sf.net
git://git.onelab.eu / linux-2.6.git / blobdiff