1 Linux* Base Driver for the Intel(R) Ethernet 10 Gigabit PCI Express Family of
3 =============================================================================
5 Intel 10 Gigabit Linux driver.
6 Copyright(c) 1999 - 2013 Intel Corporation.
11 - Identifying Your Adapter
12 - Additional Configurations
17 Identifying Your Adapter
18 ========================
20 The driver in this release is compatible with 82598, 82599 and X540-based
21 Intel Network Connections.
23 For more information on how to identify your adapter, go to the Adapter &
26 http://support.intel.com/support/network/sb/CS-012904.htm
28 SFP+ Devices with Pluggable Optics
29 ----------------------------------
33 NOTES: If your 82599-based Intel(R) Network Adapter came with Intel optics, or
34 is an Intel(R) Ethernet Server Adapter X520-2, then it only supports Intel
35 optics and/or the direct attach cables listed below.
37 When 82599-based SFP+ devices are connected back to back, they should be set to
38 the same Speed setting via ethtool. Results may vary if you mix speed settings.
39 82598-based adapters support all passive direct attach cables that comply
40 with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach
41 cables are not supported.
43 Supplier Type Part Numbers
46 Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT
47 Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDDZ-IN1
48 Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2
50 Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT
51 Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDDZ-IN1
52 Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDZ-IN2
54 The following is a list of 3rd party SFP+ modules and direct attach cables that
55 have received some testing. Not all modules are applicable to all devices.
57 Supplier Type Part Numbers
59 Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL
60 Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ
61 Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL
63 Finisar DUAL RATE 1G/10G SFP+ SR (No Bail) FTLX8571D3QCV-IT
64 Avago DUAL RATE 1G/10G SFP+ SR (No Bail) AFBR-703SDZ-IN1
65 Finisar DUAL RATE 1G/10G SFP+ LR (No Bail) FTLX1471D3QCV-IT
66 Avago DUAL RATE 1G/10G SFP+ LR (No Bail) AFCT-701SDZ-IN1
67 Finistar 1000BASE-T SFP FCLF8522P2BTL
68 Avago 1000BASE-T SFP ABCU-5710RZ
70 82599-based adapters support all passive and active limiting direct attach
71 cables that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications.
73 Laser turns off for SFP+ when device is down
74 -------------------------------------------
75 "ip link set down" turns off the laser for 82599-based SFP+ fiber adapters.
76 "ip link set up" turns on the laser.
81 NOTES for 82598-Based Adapters:
82 - Intel(R) Network Adapters that support removable optical modules only support
83 their original module type (i.e., the Intel(R) 10 Gigabit SR Dual Port
84 Express Module only supports SR optical modules). If you plug in a different
85 type of module, the driver will not load.
86 - Hot Swapping/hot plugging optical modules is not supported.
87 - Only single speed, 10 gigabit modules are supported.
88 - LAN on Motherboard (LOMs) may support DA, SR, or LR modules. Other module
89 types are not supported. Please see your system documentation for details.
91 The following is a list of 3rd party SFP+ modules and direct attach cables that
92 have received some testing. Not all modules are applicable to all devices.
94 Supplier Type Part Numbers
96 Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL
97 Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ
98 Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL
100 82598-based adapters support all passive direct attach cables that comply
101 with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach
102 cables are not supported.
107 Ethernet Flow Control (IEEE 802.3x) can be configured with ethtool to enable
108 receiving and transmitting pause frames for ixgbe. When TX is enabled, PAUSE
109 frames are generated when the receive packet buffer crosses a predefined
110 threshold. When rx is enabled, the transmit unit will halt for the time delay
111 specified when a PAUSE frame is received.
113 Flow Control is enabled by default. If you want to disable a flow control
114 capable link partner, use ethtool:
116 ethtool -A eth? autoneg off RX off TX off
118 NOTE: For 82598 backplane cards entering 1 gig mode, flow control default
119 behavior is changed to off. Flow control in 1 gig mode on these devices can
122 Intel(R) Ethernet Flow Director
123 -------------------------------
124 Supports advanced filters that direct receive packets by their flows to
125 different queues. Enables tight control on routing a flow in the platform.
126 Matches flows and CPU cores for flow affinity. Supports multiple parameters
127 for flexible flow classification and load balancing.
129 Flow director is enabled only if the kernel is multiple TX queue capable.
131 An included script (set_irq_affinity.sh) automates setting the IRQ to CPU
134 You can verify that the driver is using Flow Director by looking at the counter
135 in ethtool: fdir_miss and fdir_match.
137 Other ethtool Commands:
138 To enable Flow Director
139 ethtool -K ethX ntuple on
141 Use -U switch. e.g., ethtool -U ethX flow-type tcp4 src-ip 10.0.128.23
143 To see the list of filters currently present:
146 Perfect Filter: Perfect filter is an interface to load the filter table that
147 funnels all flow into queue_0 unless an alternative queue is specified using
148 "action". In that case, any flow that matches the filter criteria will be
149 directed to the appropriate queue.
151 If the queue is defined as -1, filter will drop matching packets.
153 To account for filter matches and misses, there are two stats in ethtool:
154 fdir_match and fdir_miss. In addition, rx_queue_N_packets shows the number of
155 packets processed by the Nth queue.
157 NOTE: Receive Packet Steering (RPS) and Receive Flow Steering (RFS) are not
158 compatible with Flow Director. IF Flow Director is enabled, these will be
161 The following three parameters impact Flow Director.
165 Valid Range: 0-2 (0=off, 1=ATR, 2=Perfect filter mode)
168 Flow Director filtering modes.
172 Valid Range: 0-2 (0=64k, 1=128k, 2=256k)
175 Flow Director allocated packet buffer size.
182 Software ATR Tx packet sample rate. For example, when set to 20, every 20th
183 packet, looks to see if the packet will create a new flow.
188 Default Value: 1 (off)
190 0 - n: where n is the number of NUMA nodes (i.e. 0 - 3) currently online in
192 1: turns this option off
194 The Node parameter will allow you to pick which NUMA node you want to have
195 the adapter allocate memory on.
202 If the value is greater than 0 it will also force the VMDq parameter to be 1
205 This parameter adds support for SR-IOV. It causes the driver to spawn up to
206 max_vfs worth of virtual function.
209 Additional Configurations
210 =========================
214 The driver supports Jumbo Frames for all adapters. Jumbo Frames support is
215 enabled by changing the MTU to a value larger than the default of 1500.
216 The maximum value for the MTU is 16110. Use the ip command to
217 increase the MTU size. For example:
219 ip link set dev ethx mtu 9000
221 The maximum MTU setting for Jumbo Frames is 9710. This value coincides
222 with the maximum Jumbo Frames size of 9728.
224 Generic Receive Offload, aka GRO
225 --------------------------------
226 The driver supports the in-kernel software implementation of GRO. GRO has
227 shown that by coalescing Rx traffic into larger chunks of data, CPU
228 utilization can be significantly reduced when under large Rx load. GRO is an
229 evolution of the previously-used LRO interface. GRO is able to coalesce
230 other protocols besides TCP. It's also safe to use with configurations that
231 are problematic for LRO, namely bridging and iSCSI.
233 Data Center Bridging, aka DCB
234 -----------------------------
235 DCB is a configuration Quality of Service implementation in hardware.
236 It uses the VLAN priority tag (802.1p) to filter traffic. That means
237 that there are 8 different priorities that traffic can be filtered into.
238 It also enables priority flow control which can limit or eliminate the
239 number of dropped packets during network stress. Bandwidth can be
240 allocated to each of these priorities, which is enforced at the hardware
243 To enable DCB support in ixgbe, you must enable the DCB netlink layer to
244 allow the userspace tools (see below) to communicate with the driver.
245 This can be found in the kernel configuration here:
247 -> Networking support
248 -> Networking options
249 -> Data Center Bridging support
251 Once this is selected, DCB support must be selected for ixgbe. This can
255 -> Network device support (NETDEVICES [=y])
256 -> Ethernet (10000 Mbit) (NETDEV_10000 [=y])
257 -> Intel(R) 10GbE PCI Express adapters support
258 -> Data Center Bridging (DCB) Support
260 After these options are selected, you must rebuild your kernel and your
263 In order to use DCB, userspace tools must be downloaded and installed.
264 The dcbd tools can be found at:
270 The driver utilizes the ethtool interface for driver configuration and
271 diagnostics, as well as displaying statistical information. The latest
272 ethtool version is required for this functionality.
274 The latest release of ethtool can be found from
275 http://ftp.kernel.org/pub/software/network/ethtool/
279 This release of the ixgbe driver contains new code to enable users to use
280 Fiber Channel over Ethernet (FCoE) and Data Center Bridging (DCB)
281 functionality that is supported by the 82598-based hardware. This code has
282 no default effect on the regular driver operation, and configuring DCB and
283 FCoE is outside the scope of this driver README. Refer to
284 http://www.open-fcoe.org/ for FCoE project information and contact
285 e1000-eedc@lists.sourceforge.net for DCB information.
287 MAC and VLAN anti-spoofing feature
288 ----------------------------------
289 When a malicious driver attempts to send a spoofed packet, it is dropped by
290 the hardware and not transmitted. An interrupt is sent to the PF driver
291 notifying it of the spoof attempt.
293 When a spoofed packet is detected the PF driver will send the following
294 message to the system log (displayed by the "dmesg" command):
296 Spoof event(s) detected on VF (n)
298 Where n=the VF that attempted to do the spoofing.
304 An excellent article on performance tuning can be found at:
306 http://www.redhat.com/promo/summit/2008/downloads/pdf/Thursday/Mark_Wagner.pdf
312 Enabling SR-IOV in a 32-bit or 64-bit Microsoft* Windows* Server 2008/R2
313 Guest OS using Intel (R) 82576-based GbE or Intel (R) 82599-based 10GbE
315 ------------------------------------------------------------------------
316 KVM Hypervisor/VMM supports direct assignment of a PCIe device to a VM. This
317 includes traditional PCIe devices, as well as SR-IOV-capable devices using
318 Intel 82576-based and 82599-based controllers.
320 While direct assignment of a PCIe device or an SR-IOV Virtual Function (VF)
321 to a Linux-based VM running 2.6.32 or later kernel works fine, there is a
322 known issue with Microsoft Windows Server 2008 VM that results in a "yellow
323 bang" error. This problem is within the KVM VMM itself, not the Intel driver,
324 or the SR-IOV logic of the VMM, but rather that KVM emulates an older CPU
325 model for the guests, and this older CPU model does not support MSI-X
326 interrupts, which is a requirement for Intel SR-IOV.
328 If you wish to use the Intel 82576 or 82599-based controllers in SR-IOV mode
329 with KVM and a Microsoft Windows Server 2008 guest try the following
330 workaround. The workaround is to tell KVM to emulate a different model of CPU
331 when using qemu to create the KVM guest:
333 "-cpu qemu64,model=13"
339 For general information, go to the Intel support website at:
341 http://support.intel.com
343 or the Intel Wired Networking project hosted by Sourceforge at:
345 http://e1000.sourceforge.net
347 If an issue is identified with the released source code on the supported
348 kernel with a supported adapter, email the specific information related
349 to the issue to e1000-devel@lists.sf.net