Emulex Drivers for Windows Release Notes
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1. disabled globally at operating system level but will still be enabled at the adapter level The behavior of other RDMA related PowerShell cmdlets can be inconsistent and should not be relied upon For example Get NetAdapterStatistics RdmaStatistics will not show any statistics but NETSTAT EXE xan will show active connections Workaround If you run the PowerShell cmdlet Set NetOffloadGlobalSetting NetworkDirect Disabled use the following command to enable RDMA at operating system level once again Set NetOffloadGlobalSetting NetworkDirect Enabled Alternatively you can use the following PowerShell cmdlets to disable or enable RDMA Disable NetAdapterRdma and Enable NetAdapterRdma 8 Some switches strip the VLAN tag from the incoming frame with VLAN 0 or VLAN 1 and send the frame out without a VLAN tag and so without VLAN priority resulting in dropped frames If VLAN 0 or VLAN 1 is configured the driver posts an informational message warning you of an incorrect configuration however the results of this error are not prevented Workaround When running NIC RoCE personality if PFC is enabled always configure the interface with a VLAN ensuring that the VLAN ID is greater than 1 9 Windows NIC driver transmission may consume all of the available cycles on one CPU core resulting in the system freezing or pausing Workaround None 10 When using OCe14000 series adapters with active RDMA operations completion queue errors occu2. gt S EMULEX Emulex Drivers for Windows Release Notes Versions FC and FCoE Version 10 2 370 8 NIC Version 10 2 370 18 iSCSI Version 10 2 370 9 Date September 2014 Purpose and Contact Information These release notes describe new features resolved known issues and current known issues associated with this Emulex drivers for Windows release For the latest product documentation go to www Emulex com If you have questions or require additional information contact an authorized Emulex technical support representative at tech support emulex com 800 854 7112 US Canada toll free 1 714 885 3402 US International or 44 1189 772929 Europe Middle East and Africa New Features 1 Supports alternate routing ID interpretation ARI 2 Supports RDMA over Converged Ethernet RoCE 3 Supports Quality of Service QoS for LPe16000 series OCe15000 series and OCe14000 series adapters Resolved Issues 1 Tx Ethernet traffic unfairness is no longer observed on OCe14000 series adapters 2 Changing from UMC to a non UMC configuration now restores the correct value in the registry key NumRssQueues Default value 3 While Powershell still reports RSS driver capabilities using the registry entries rather than querying the driver this issue has been documented in the Emulex Drivers Version 10 2 for Windows User Manual 4 After disabling a UMC channel by specifying a minimum or maximum bandwidth of zero and then rebooting y
3. ItemProperty Path HKLM SYSTEM CurrentControlSet Services LanmanWorkstation Parameters ConnectionCount PerRdmaNetworkInterface Value 1 Force If one of the values is set from a non default value the following command will return the value Get ItemProperty Path HKLM SYSTEM CurrentControlSet Services LanmanWorkstation Parameters ConnectionCount PerRdmaNetworkInterface Note Ifa third port fails an out of resource condition occurs The following information was omitted from the current release user manual under the topic SMB Multichannel Note When adding or removing adapters from you system you must readjust the multichannel constraints for optimal performance Workaround None The following issue applies to the current release of the user manual in Table 3 3 Windows Server 2008 Windows Server 2008 R2 Windows Server 2012 and Windows Server 2012 R2 NIC Driver Options The Receive Buffer parameter entry incorrectly indicates that the value range is 64 16384 The correct value range for the Receive Buffer parameter is 64 32768 Workaround None Packet drops may occur when using a 40GbE Cisco switch to connect more than six clients to an adapter configured for RoCE Completion queue errors may be reported on the seventh client trying to connect Workaround None RoCE traffic requires a lossless network During heavy I O PFC traffic may be dropped at the switch Workaround Increase switch port egress buf
4. agefile is configured on a direct attached storage DAS volume updating the boot driver causes a system lock up The MPIO driver claiming the boot LUN incorrectly allows the boot LUN to be disabled during a driver update This leads to a system lock up Workaround Microsoft has released a hotfix that remedies this problem Download and install information for the hotfix at http support microsoft com id 2591462 While Emulex drivers for Windows 7 and Windows 8 8 1 are supported they are Emulex signed only You must accept the Emulex certificate to install the client kits Support is provided by Emulex but not by Microsoft Workaround None If you configure the link speed in a BIOS utility the speed may be overridden by the Windows operating system according to its own configuration settings Workaround Configure the link speed in both the operating system driver and the Boot BIOS or UEFI driver When attaching an LTO6 tape to LPe16000 series adapters an operating system error may occur often referred to as a BSOD The computer may freeze and require restarting to make it operational Workaround Use a topology other than private loop Emulex Drivers for Windows Release Notes 2 P010079 01B Rev A gt G EMULEX 7 Disabling RDMA using the PowerShell cmdlet Set NetOffloadGlobalSetting NetworkDirect Disabled is not supported Issuing the command can result in an inconsistent RDMA state specifically RDMA will be
5. fers Consult your switch vendor or switch documentation Emulex Drivers for Windows Release Notes 5 P010079 01B Rev A gt G EMULEX 22 RoCE is disabled when switching from IPv6 to IPv4 or from IPv4 to IPv6 Workaround To avoid disabling RoCE when switching from IPv4 to IPv6 or from IPv6 to IPv4 use the following procedures IPv4 to IPv6 If IPv4 is enabled and you want to disable IPv4 and enable IPv6 e From the Network Property page select both IPv4 and IPv6 Click OK e Re open the Network Property page and clear IPv4 while leaving IPv6 selected Click OK IPv6 to IPv4 If IPv6 is enabled and you want to disable IPv6 and enable IPv4 e From the Network Property page select both IPv4 and IPv6 Click OK e Re open the Network Property page and clear IPv6 while leaving IPv4 selected Click OK Technical Tips 1 SR IOV and Hyper V Windows Sever 2012 Hyper V supports SR IOV only with Windows Server 2012 and Windows 8 8 1 guest operating systems Microsoft has designed SR IOV as an optional feature in the guest operating system where the SR IOV virtual function is always paired with an emulated NIC interface which is similar to any non SR IOV virtual NIC The virtual PCI function may be added and removed dynamically from the guest operating system without interrupting the network traffic With this design Microsoft is able to support key features like Live Migration and snapshots even with SR IOV enabled These fea
6. ly e During a VMQ affinity change some receive packets may be dropped as a result of VMQ CPU affinity changes resulting in retries of the lost frames e The PowerShell applet Get NetAdapterVmqQueue might report a Device not present error if executing during VMQ affinity changes e If using any type of multichannel UMC NPAR Flex10 VNIC all possible functions must be enabled amp configured e VMQs are only supported on PFO and PF1 of any adapter e Advanced Mode must be enabled Workaround None For optimal NVGRE performance if UMC is used enable a HyperV virtual switch on only one NIC function per port Workaround None Windows driver incorrectly displays FDMI OptionROM version and operating system name Workaround None Windows driver intermittently fails to enumerate target after zoning merge Workaround None SMB Direct failover limitations using 4 port OCe14000 series adapters When using 4 port OCe14000 series adapters with the default two queue pair QP per port setting and one port fails the RDMA connections will be torn down as the result of an out of resource failure When using one QP up to two ports can fail without running out of resources Emulex Drivers for Windows Release Notes 4 P010079 01B Rev A 18 19 20 21 gt G EMULEX Workaround When using a 4 port adapter you must change the default QP setting from two to one using the following powershell command Set
7. our system the UMC channel now displays a link down status 5 The Device Manager correctly uninstalls Emulex devices on Windows 2008 and Windows 2008 SP2 6 Microsoft KB2846837 is automatically installed as part of the Emulex Windows driver installation so specific low performance issues are no longer seen with the Emulex NIC driver Emulex Drivers for Windows Release Notes 1 P010079 01B Rev A gt G EMULEX Known Issues 1 Only a maximum of 64 targets can be discovered using the Add Portal option in the iSCSI Target Discovery dialog box Workaround Targets can be added manually or discovered through iSNS Crash Dump on Windows iSCSI Boot From storage area network SAN fails when the boot target is not among the first seven targets configured in iSCSISelect or Unified Extensible Firmware Interface Basic Input Output System UEFI BIOS When an iSCSI Boot From SAN configuration has many iSCSI targets configured and the iSCSI boot target is not among the first seven targets configured from iSCSISelect or UEFI BIOS the crash dump function fails to complete successfully This is a known limitation of the Emulex iSCSI driver on Windows Workaround From iSCSI Select or UEFI BIOS the boot target must be configured before the other persistent targets are set up so that they are within the first seven targets In a Boot From SAN configuration of Windows 2008 R2 and Windows 7 if multipath input output MPIO is enabled and the p
8. products also apply to OCe11100R series products Emulex Drivers for Windows Release Notes 6 P010079 01B Rev A
9. r on the server when the client is rebooted Any RDMA operation issued by the server in response to an SMB client must be completed before the connections disappear from the server When rebooting any outstanding RDMA operations issued prior to the reboot will be continually retried by the server until it times out resulting in a completion queue error Workaround None 11 After a Windows driver reload with NetworkDirect disabled throughput by way of SMB gets capped to the highest link speed available as shown by Get SmbClientNetworkInterface PowerShell Command on the client system This issue is seen only if RDMA is not enabled on the adapter and SMB uses TCP Workaround Use one of the following procedures e Set Multichannel Constraint so that only intended interface will be used for traffic e Disable and then enable the port of the required interface Emulex Drivers for Windows Release Notes 3 P010079 01B Rev A 12 13 14 15 16 17 gt EMULEX e Ensure that no other interfaces are enabled This requires SMB to choose the only interface available that will not cap throughput e Reboot the system You may experience packet loss low performance and possible dropped connections as a result of Windows Hyper V time outs when using an OCe11102 UCNA Workaround Disable virtual machine queue VMQ for affected adapters Contact Emulex support for assistance When using VMQ the following the following issues app
10. tures do not depend on the existence of the SR IOV hardware they only save the state of the emulated network interface When the virtual machine is restored it will try to recreate the SR IOV virtual NIC but if the hardware is not available it can continue using the emulated NIC seamlessly 2 If you are running Windows 2012 R2 ensure that you have installed the April 2014 Windows update If Windows 2012 R2 is not running with the April 2014 update and shutdown is initiated while RoCE traffic is in progress an operating system error may occur often referred to as a BSOD The computer may freeze and require restarting to make it operational While the April 2014 update is specifically required to avoid this issue Emulex strongly recommends the you have Windows Update activated on your servers Copyright 2014 Emulex All rights reserved worldwide This document refers to various companies and products by their trade names In most if not all cases their respective companies claim these designations as trademarks or registered trademarks This information is provided for reference only Although this information is believed to be accurate and reliable at the time of publication Emulex assumes no responsibility for errors or omissions Emulex reserves the right to make changes or corrections without notice This report is the property of Emulex and may not be duplicated without permission from the Company Note References to OCe11100 series
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