| Linux Base Driver for 10 Gigabit PCI Express Intel(R) Network Connection |
| ======================================================================== |
| |
| Intel Gigabit Linux driver. |
| Copyright(c) 1999 - 2010 Intel Corporation. |
| |
| Contents |
| ======== |
| |
| - Identifying Your Adapter |
| - Additional Configurations |
| - Performance Tuning |
| - Known Issues |
| - Support |
| |
| Identifying Your Adapter |
| ======================== |
| |
| The driver in this release is compatible with 82598 and 82599-based Intel |
| Network Connections. |
| |
| For more information on how to identify your adapter, go to the Adapter & |
| Driver ID Guide at: |
| |
| http://support.intel.com/support/network/sb/CS-012904.htm |
| |
| SFP+ Devices with Pluggable Optics |
| ---------------------------------- |
| |
| 82599-BASED ADAPTERS |
| |
| NOTES: If your 82599-based Intel(R) Network Adapter came with Intel optics, or |
| is an Intel(R) Ethernet Server Adapter X520-2, then it only supports Intel |
| optics and/or the direct attach cables listed below. |
| |
| When 82599-based SFP+ devices are connected back to back, they should be set to |
| the same Speed setting via ethtool. Results may vary if you mix speed settings. |
| 82598-based adapters support all passive direct attach cables that comply |
| with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach |
| cables are not supported. |
| |
| Supplier Type Part Numbers |
| |
| SR Modules |
| Intel DUAL RATE 1G/10G SFP+ SR (bailed) FTLX8571D3BCV-IT |
| Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDDZ-IN1 |
| Intel DUAL RATE 1G/10G SFP+ SR (bailed) AFBR-703SDZ-IN2 |
| LR Modules |
| Intel DUAL RATE 1G/10G SFP+ LR (bailed) FTLX1471D3BCV-IT |
| Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDDZ-IN1 |
| Intel DUAL RATE 1G/10G SFP+ LR (bailed) AFCT-701SDZ-IN2 |
| |
| The following is a list of 3rd party SFP+ modules and direct attach cables that |
| have received some testing. Not all modules are applicable to all devices. |
| |
| Supplier Type Part Numbers |
| |
| Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL |
| Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ |
| Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL |
| |
| Finisar DUAL RATE 1G/10G SFP+ SR (No Bail) FTLX8571D3QCV-IT |
| Avago DUAL RATE 1G/10G SFP+ SR (No Bail) AFBR-703SDZ-IN1 |
| Finisar DUAL RATE 1G/10G SFP+ LR (No Bail) FTLX1471D3QCV-IT |
| Avago DUAL RATE 1G/10G SFP+ LR (No Bail) AFCT-701SDZ-IN1 |
| Finistar 1000BASE-T SFP FCLF8522P2BTL |
| Avago 1000BASE-T SFP ABCU-5710RZ |
| |
| 82599-based adapters support all passive and active limiting direct attach |
| cables that comply with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. |
| |
| Laser turns off for SFP+ when ifconfig down |
| ------------------------------------------- |
| "ifconfig down" turns off the laser for 82599-based SFP+ fiber adapters. |
| "ifconfig up" turns on the later. |
| |
| |
| 82598-BASED ADAPTERS |
| |
| NOTES for 82598-Based Adapters: |
| - Intel(R) Network Adapters that support removable optical modules only support |
| their original module type (i.e., the Intel(R) 10 Gigabit SR Dual Port |
| Express Module only supports SR optical modules). If you plug in a different |
| type of module, the driver will not load. |
| - Hot Swapping/hot plugging optical modules is not supported. |
| - Only single speed, 10 gigabit modules are supported. |
| - LAN on Motherboard (LOMs) may support DA, SR, or LR modules. Other module |
| types are not supported. Please see your system documentation for details. |
| |
| The following is a list of 3rd party SFP+ modules and direct attach cables that |
| have received some testing. Not all modules are applicable to all devices. |
| |
| Supplier Type Part Numbers |
| |
| Finisar SFP+ SR bailed, 10g single rate FTLX8571D3BCL |
| Avago SFP+ SR bailed, 10g single rate AFBR-700SDZ |
| Finisar SFP+ LR bailed, 10g single rate FTLX1471D3BCL |
| |
| 82598-based adapters support all passive direct attach cables that comply |
| with SFF-8431 v4.1 and SFF-8472 v10.4 specifications. Active direct attach |
| cables are not supported. |
| |
| |
| Flow Control |
| ------------ |
| Ethernet Flow Control (IEEE 802.3x) can be configured with ethtool to enable |
| receiving and transmitting pause frames for ixgbe. When TX is enabled, PAUSE |
| frames are generated when the receive packet buffer crosses a predefined |
| threshold. When rx is enabled, the transmit unit will halt for the time delay |
| specified when a PAUSE frame is received. |
| |
| Flow Control is enabled by default. If you want to disable a flow control |
| capable link partner, use ethtool: |
| |
| ethtool -A eth? autoneg off RX off TX off |
| |
| NOTE: For 82598 backplane cards entering 1 gig mode, flow control default |
| behavior is changed to off. Flow control in 1 gig mode on these devices can |
| lead to Tx hangs. |
| |
| Additional Configurations |
| ========================= |
| |
| Jumbo Frames |
| ------------ |
| The driver supports Jumbo Frames for all adapters. Jumbo Frames support is |
| enabled by changing the MTU to a value larger than the default of 1500. |
| The maximum value for the MTU is 16110. Use the ifconfig command to |
| increase the MTU size. For example: |
| |
| ifconfig ethx mtu 9000 up |
| |
| The maximum MTU setting for Jumbo Frames is 16110. This value coincides |
| with the maximum Jumbo Frames size of 16128. |
| |
| Generic Receive Offload, aka GRO |
| -------------------------------- |
| The driver supports the in-kernel software implementation of GRO. GRO has |
| shown that by coalescing Rx traffic into larger chunks of data, CPU |
| utilization can be significantly reduced when under large Rx load. GRO is an |
| evolution of the previously-used LRO interface. GRO is able to coalesce |
| other protocols besides TCP. It's also safe to use with configurations that |
| are problematic for LRO, namely bridging and iSCSI. |
| |
| Data Center Bridging, aka DCB |
| ----------------------------- |
| DCB is a configuration Quality of Service implementation in hardware. |
| It uses the VLAN priority tag (802.1p) to filter traffic. That means |
| that there are 8 different priorities that traffic can be filtered into. |
| It also enables priority flow control which can limit or eliminate the |
| number of dropped packets during network stress. Bandwidth can be |
| allocated to each of these priorities, which is enforced at the hardware |
| level. |
| |
| To enable DCB support in ixgbe, you must enable the DCB netlink layer to |
| allow the userspace tools (see below) to communicate with the driver. |
| This can be found in the kernel configuration here: |
| |
| -> Networking support |
| -> Networking options |
| -> Data Center Bridging support |
| |
| Once this is selected, DCB support must be selected for ixgbe. This can |
| be found here: |
| |
| -> Device Drivers |
| -> Network device support (NETDEVICES [=y]) |
| -> Ethernet (10000 Mbit) (NETDEV_10000 [=y]) |
| -> Intel(R) 10GbE PCI Express adapters support |
| -> Data Center Bridging (DCB) Support |
| |
| After these options are selected, you must rebuild your kernel and your |
| modules. |
| |
| In order to use DCB, userspace tools must be downloaded and installed. |
| The dcbd tools can be found at: |
| |
| http://e1000.sf.net |
| |
| Ethtool |
| ------- |
| The driver utilizes the ethtool interface for driver configuration and |
| diagnostics, as well as displaying statistical information. The latest |
| ethtool version is required for this functionality. |
| |
| The latest release of ethtool can be found from |
| http://ftp.kernel.org/pub/software/network/ethtool/ |
| |
| FCoE |
| ---- |
| This release of the ixgbe driver contains new code to enable users to use |
| Fiber Channel over Ethernet (FCoE) and Data Center Bridging (DCB) |
| functionality that is supported by the 82598-based hardware. This code has |
| no default effect on the regular driver operation, and configuring DCB and |
| FCoE is outside the scope of this driver README. Refer to |
| http://www.open-fcoe.org/ for FCoE project information and contact |
| e1000-eedc@lists.sourceforge.net for DCB information. |
| |
| MAC and VLAN anti-spoofing feature |
| ---------------------------------- |
| When a malicious driver attempts to send a spoofed packet, it is dropped by |
| the hardware and not transmitted. An interrupt is sent to the PF driver |
| notifying it of the spoof attempt. |
| |
| When a spoofed packet is detected the PF driver will send the following |
| message to the system log (displayed by the "dmesg" command): |
| |
| Spoof event(s) detected on VF (n) |
| |
| Where n=the VF that attempted to do the spoofing. |
| |
| |
| Performance Tuning |
| ================== |
| |
| An excellent article on performance tuning can be found at: |
| |
| http://www.redhat.com/promo/summit/2008/downloads/pdf/Thursday/Mark_Wagner.pdf |
| |
| |
| Known Issues |
| ============ |
| |
| Enabling SR-IOV in a 32-bit Microsoft* Windows* Server 2008 Guest OS using |
| Intel (R) 82576-based GbE or Intel (R) 82599-based 10GbE controller under KVM |
| ----------------------------------------------------------------------------- |
| KVM Hypervisor/VMM supports direct assignment of a PCIe device to a VM. This |
| includes traditional PCIe devices, as well as SR-IOV-capable devices using |
| Intel 82576-based and 82599-based controllers. |
| |
| While direct assignment of a PCIe device or an SR-IOV Virtual Function (VF) |
| to a Linux-based VM running 2.6.32 or later kernel works fine, there is a |
| known issue with Microsoft Windows Server 2008 VM that results in a "yellow |
| bang" error. This problem is within the KVM VMM itself, not the Intel driver, |
| or the SR-IOV logic of the VMM, but rather that KVM emulates an older CPU |
| model for the guests, and this older CPU model does not support MSI-X |
| interrupts, which is a requirement for Intel SR-IOV. |
| |
| If you wish to use the Intel 82576 or 82599-based controllers in SR-IOV mode |
| with KVM and a Microsoft Windows Server 2008 guest try the following |
| workaround. The workaround is to tell KVM to emulate a different model of CPU |
| when using qemu to create the KVM guest: |
| |
| "-cpu qemu64,model=13" |
| |
| |
| Support |
| ======= |
| |
| For general information, go to the Intel support website at: |
| |
| http://support.intel.com |
| |
| or the Intel Wired Networking project hosted by Sourceforge at: |
| |
| http://e1000.sourceforge.net |
| |
| 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 |