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XenServer 7.1 Release NotesFebruary 2017XenServer 7.1 Release NotesWelcome to XenServer 7.1. This document provides important information about the XenServer 7.1release.XenServer 7.1 is available in two commercial editions: Standard EditionEnterprise EditionXenServer 7.1 is available to download from the XenServer Product Download page.New Features and Improvements in XenServer 7.1XenServer 7.1 introduces enhanced features and functionality for application, desktop and servervirtualization use cases. Major themes for this release are simplified maintenance, enhancements toCitrix Provisioning Services (PVS) and support for Nutanix Hyperconverged Infrastructure.All XenServer 7.1 features are now available to all licensed XenApp/XenDesktop customers.PVS-Accelerator Enterprise EditionCitrix XenServer and Citrix XenApp/XenDesktop development teams have jointly developed andenhanced the existing Provisioning Services (PVS) solution to maximize the benefits customersreceive from their Citrix Application and Desktop Delivery solutions.The new PVS-Accelerator feature dramatically reduces network traffic in XenApp and XenDesktopdeployments in order to achieve greater virtual server and desktop density, faster boot times duringboot storms, and overall improved server and desktop performance.This feature is available when PVS 7.13 is used in conjunction with XenServer 7.1.XenServer Nutanix IntegrationWe have worked closely with Nutanix to seamlessly integrate XenServer into the NutanixHyperconverged Infrastructure product. This is available within the Nutanix AOS 5.0 Tech Previewrelease, and enables Nutanix customers to leverage the unique capabilities of XenServer.Automated Updates Using XenCenter Enterprise EditionThe Install Update wizard in XenCenter has got a whole lot smarter, automatically determiningwhich hotfixes are required to bring a pool up-to-date and enabling customers to update multiplepools in a single pass of the wizard.Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

Enterprise EditionXenServer6.5:LiveReleasePatching NotesXenServerIn an industry-first,XenServer delivers the ability to seamlessly apply patches to a running systemJanuary2015without requiring host reboots.This capability will be applicable for select Linux kernel and Xen hypervisor hotfixes, which willconsist of both a live patch, which will be applied to the Control Domain (Dom0) memory of thehost, as well as a hotfix to update the disk image of the host (through the Automated Updatesmechanism). This ensures that following any future reboots, the applied patches persist.Long Term Service Release (LTSR)As a Long Term Service Release, XenServer 7.1 is available with a 10-year servicing option, comprisedof 5 years of standard support, plus an optional 5 years of extended support.Additional XenCenter Improvements vCPU Hotplug for Linux VMs Standard and Enterprise EditionsAbility to change the Control Domain (Dom0) memory using XenCenterPerformance Improvements Improved SMB performance Enterprise EditionSignificant reduction in the time taken for VM Import/Export operationsSupport for New GuestsXenServer 7.1 supports the following new guest operating systems: Windows Server 2016SLES 11 SP4CentOS 6.8, 7.3RHEL 6.8, 7.3Oracle Linux 6.8, 7.3Scientific Linux 6.8NeoKylin Linux Advance Server 6.5NeoKylin Linux Advance Server 7Platform UpdatesThis release also incorporates the following core platform updates: Xen hypervisor v4.7.1Dom0 Linux Kernel v4.4Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

Support for New Processors Intel Skylake-H processorXenServer6.5: Release NotesJanuary 2015XenServer Conversion Manager Updates Enterprise Edition Ability to convert VMs running on VMware ESXi and vSphere hostsSupport for converting Linux guest operating systemsInteroperability with Citrix ProductsXenServer 7.1 is interoperable with Citrix XenApp/XenDesktop 7.6, 7.12 and 7.13.Localization SupportThe localized version of XenCenter (Simplified Chinese and Japanese) is also available in this release.Installation and UpgradesBefore beginning installation, customers should review the system requirements and installationinstructions detailed in the XenServer 7.1 Installation Guide.LicensingCustomers should upgrade their Citrix License Server to version 11.13.1.2 or higher in order to usethe XenServer 7.1 licensed features.Note: Customers wishing to use the PVS-Accelerator feature are required to upgrade their LicenseServer to 11.14.For more information about XenServer 7.1 licensing, see XenServer 7.1 Licensing FAQ.Product DocumentationTo access XenServer 7.1 product documentation, see XenServer 7.1 Product Documentation.For frequently asked questions about XenServer, see XenServer 7.1 Technical FAQ.Documentation may be updated or changed after the initial release. We suggest that you regularlyvisit the XenServer 7.1 page on Citrix Product Documentation to learn about updates.Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

Advisories and Known IssuesThe following6.5:sectiondetails advisoriesXenServerReleaseNotesand minor issues with this release and any workarounds thatcan be applied.January 2015Graphics SupportIMPORTANT:NVIDIA does not support the use of K1 or K2 cards with XenServer 7.1. This reflects NVIDIA'sannouncement that from December 2016, no new hypervisor versions or guest operating systemswill be supported with these cards.Customers who wish to use K1 or K2 cards should continue to use XenServer 7.0, which is supporteduntil May 2021.Newer NVIDIA Maxwell cards are fully supported in XenServer 7.1. Intel GVT-g is now supported on Intel Skylake processors. XenServer hosts with large amounts of RAM that use Intel Xeon v4 or higher processors mayencounter unexpected crashes when performing certain operations such as concurrentlyrebooting multiple vGPU-enabled VMs. To work around this issue, add ept no-pml tothe Xen command line and reboot the host. For more information, neral After upgrading a XenServer host from a previous version to XenServer 7.1, Windows VMswith XenServer Tools installed may incorrectly report as not having the XenServer Toolsinstalled, or display some of the functionalities as unavailable. To work around this issue,install XenServer Tools issued with XenServer 7.1. Enabling Active Directory (AD) authentication on a domain controller that has only one vCPUcan fail. To resolve this issue, ensure that the AD domain controllers have at least twovCPUs. When you import a Windows VM from an ESXi server to XenServer, the IPv4/IPv6 networksettings can be lost. To retain the network settings, reconfigure the IPv4/IPv6 settings aftercompleting the conversion. After downloading an update from the Citrix Support website, attempts to upload the zip filewithout unpacking the ISO, or uploading an incomplete ISO file to a pool of XenServer hostscan fail with VDI IO ERROR - Device I/O errors. To resolve this issue, ensurethat you have completely downloaded the zip file and unpack the ISO before attempting toupload the update to the XenServer pool.Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

If a pool's CPU feature set changes while a VM is running (for example, when a new host isadded to an existing pool, or when the VM is migrated to a host in another pool), the VMXenServer6.5: Releasewill continueto use theNotesfeature set which was applied when it was started. To update theVM to use the pool's new feature set, the VM must be powered off and then started.January 2015Rebooting the VM, for example, by clicking 'Reboot' in XenCenter, does not update the VM'sfeature set. After migrating Container Managed VMs between pools, the Container Managementfunctionality stops working for the VMs. This is because Container Management isimplemented using a pool-specific key. To work around this issue, the VM-specificpreparation step for "Container Management" needs to be repeated on the new pool. Thismeans:o For CoreOS, the Cloud Config Drive needs to be updated by changing the ConfigDrive configuration in the VM preferences.o For RHEL/CentOS/OL 7 and Ubuntu, the xscontainer-prepare-vm needs tobe re-run. Note that even if the preparation-step is repeated, the old XenServer poolmay keep access to the VMs. Renaming a container does not trigger the Container Management view to update.Additionally, on Ubuntu 14.04, the pause or unpause of a container from outside XenCenterdoes not trigger the view to update. This may mean that XenServer may not show thecurrent (renamed/paused/unpaused) container-status. The underlying cause is that the viewonly gets refreshed following Docker event notifications. As a workaround, the refresh canbe triggered manually by performing an action (that is, start, stop) on an unrelated containerthat is running on the same VM.Internationalization Non-ASCII characters, such as characters with accents, cannot be used in the host console. XenServer root passwords must not contain non-ASCII characters.Hardware Compatibility Customers should refer to the XenServer Hardware Compatibility List (HCL) for the mostrecent additions and advice for all hardware compatibility questions.Storage XenServer does not offer fully integrated support for SMB Continuous Availability shares. Incertain scenarios where an SMB Continuous Availability master node fails, the SMB SR maybecome unresponsive and requires a host reboot. When using Nutanix SRs, the two VDIs (previously used for the HA statefile and poolmetadata) that remain after disabling HA will not be reused if HA is subsequently reenabled. Customers can safely delete these VDIs. When the default SR of a XenServer host or a pool is in a disconnected state, attempts toupload an update to that SR can fail.Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

It is not possible to attach storage provided by Microsoft iSCSI Software Target versions 3.2or 3.3. However, attempts to attach storage provided by iSCSI Target Server included inXenServer6.5:ServerReleaseNotesWindows2012 andlater will succeed.January 2015Networking If you have installed XenServer 7.0 using FCoE Boot-from-SAN, performing a Rolling PoolUpgrade (RPU) to upgrade XenServer 7.0 to XenServer 7.1 fails with the error: Could notlocate the installation specified to be reinstalled. To work aroundthis issue, upgrade the XenServer host using the XenServer installation media or by usingPXE boot with an answerfile. In some cases, booting a XenServer host from FCoE SAN using software FCoE stack can causethe host to become unresponsive due to a temporary link disruption in the host initializationphase. If the host appears to be in an unresponsive state for a long time, reboot the host toresolve this issue. XenServer does not prevent users from unplugging a NIC used by the FCoE SR.XenCenter Modifying the font size or DPI on the computer on which XenCenter is running can result inthe user interface displaying incorrectly. The default font size is 96 DPI; Windows 8 andWindows 10 refer to this as 100%.Guests XenServer's use of new hardware security features may reduce the overall performance of32-bit PV VMs. Customers impacted by this issue can either:o Run a 64-bit version of the PV Linux VM, oro Boot Xen with the {{no-smep no-smap}} option. Note that we do notrecommend this option as it can reduce the depth of security of the host. When you export a PVS-Accelerator enabled VM to OVF and then try to import it in the samepool, the PVS-Accelerator settings can be lost. Therefore, the settings are not enabled on theVM and not saved in the OVF appliance during the export. To resolve this, enable PVSAccelerator on the imported VM using XenCenter or the xe CLI. The console screen on HVM Linux guests can go blank after a period (typically ten minutes)of inactivity. You can work around this issue by adding consoleblank 0 to the kernelboot parameters of the guest. Consult your guest OS documentation for information aboutupdating the kernel boot parameters.Enterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

About CitrixXenServer6.5: ReleaseCitrix (NASDAQ:CTXS)is leading theNotestransition to software-defining the workplace, uniting virtualization, mobilitymanagement, networking and SaaS solutions to enable new ways for businesses and people to work better.January2015Citrix solutions power business mobility through secure, mobile workspaces that provide people with instantaccess to apps, desktops, data and communications on any device, over any network and cloud. With annualrevenue in 2015 of 3.28 billion, Citrix solutions are in use at more than 400,000 organizations and by over 100million users globally. Learn more at www.citrix.com.The copyright in this report and all other works of authorship and all developments made, conceived, created,discovered, invented or reduced to practice in the performance of work during this engagement are and shallremain the sole and absolute property of Citrix, subject to a worldwide, non-exclusive license to you for yourinternal distribution and use as intended hereunder. No license to Citrix products is granted herein. Citrixproducts must be licensed separately. Citrix warrants that the services have been performed in a professionaland workman-like manner using generally accepted industry standards and practices. Your exclusive remedy forbreach of this warranty shall be timely re-performance of the work by Citrix such that the warranty is met. THEWARRANTY ABOVE IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS, IMPLIED, STATUTORYOR OTHERWISE WITH RESPECT TO THE SERVICES OR PRODUCTS PROVIDED UNDER THIS AGREEMENT, THEPERFORMANCE OF MATERIALS OR PROCESSES DEVELOPED OR PROVIDED UNDER THIS AGREEMENT, OR AS TOTHE RESULTS WHICH MAY BE OBTAINED THEREFROM, AND ALL IMPLIED WARRANTIES OF MERCHANTIBILITY,FITNESS FOR A PARTICULAR PURPOSE, OR AGAINST INFRINGEMENT. Citrix’s liability to you with respect to anyservices rendered shall be limited to the amount actually paid by you. IN NO EVENT SHALL EITHER PARTY BYLIABLE TO THE OTHER PARTY HEREUNDER FOR ANY INCIDENTAL, CONSEQUENTIAL, INDIRECT OR PUNITIVEDAMAGES (INCLUDING BUT NOT LIMITED TO LOST PROFITS) REGARDLESS OF WHETHER SUCH LIABILITY IS BASEDON BREACH OF CONTRACT, TORT, OR STRICT LIABILITY. Disputes regarding this engagement shall be governedby the internal laws of the State of Florida.LINKS TO THIRD PARTY SITES. These release notes may contain links to web sites controlled by parties other thanCitrix. Citrix is not responsible for and does not endorse or accept any responsibility for the contents or use ofthese third party web sites. Citrix is providing these links to you only as a convenience, and the inclusion of anylink does not imply endorsement by Citrix of the linked web site. It is your responsibility to take precautions toensure that whatever you select for your use is free of viruses or other items of a destructive nature.Copyright 2017 Citrix Systems, Inc. All rights reserved.Citrix and Xen are registered trademarks. XenServer and XenCenter are trademarks of Citrix Systems, Inc. inthe United States and other countries.All other product names, company names, marks, logos, and symbols are trademarks of their respectiveowners.851 West Cypress Creek RoadFort Lauderdale, FL 33099954-267-3000www.citrix.comEnterprise features are available for XenServer Enterprise edition customers, or those who have access to XenServer through theirXenApp/XenDesktop entitlement. To learn more about XenServer editions, and to find out how to upgrade, visit the Citrix website.

XenServer 7.1 is available in two commercial editions: Standard Edition Enterprise Edition XenServer 7.1 is available to download from the XenServer Product Download page. New Features and Improvements in XenServer 7.1 XenServer 7.1 introduces enhanced features and functionality for