DriverForMicrosoftVmbusNetworkAdapterCitrix PVS Optimize endpoint with Power. Shell. With Citrix PVS the content of a disk is streamed over the network to an endpoint. This requires sufficient bandwidth and an optimized configuration. If both criteria are not met the endpoint suffers from delays, retries or failures. A number of best practices apply when using Citrix PVS, most of them probably apply for your situation. In the past I had to optimize my VMs manually each and every time I had to create a new v. Disk Aint nobody got time for that link driverquery. In case this helps. I was having a similar problem on a new laptop Toshiba with Windows 7 Home Premium using wifi. Accessing a share on an XP desktop. Optimize Performance of Disk, Memory, Network, and Processor in a HyperV Environment. Use the following guidelines to optimize performance of disk, memory, network. Each reference architecture in the Fast Track program combines concise guidance with validated configurations for the computing, network, storage, and virtualization. HyperV is the virtualization server role in Windows Server 2012 R2. Virtualization servers can host multiple virtual machines that are isolated from each other but. With Citrix PVS the content of a disk is streamed over the network to an endpoint. This requires sufficient bandwidth and an optimized configuration. If both criteria. Microsoft HyperV, codenamed Viridian and formerly known as Windows Server Virtualization, is a native hypervisor it can create virtual machines on x8664 systems. Acer_ET_WG5HP_A07_G215HV_Abd_21_5_Widescreen_1304528522000_766466.jpg' alt='Driver For Microsoft Vmbus Network Adapter' title='Driver For Microsoft Vmbus Network Adapter' />I wrote a Power. Shell script that optimizes the endpoint for Citrix PVS and would like to share it with you. Updated on June 1. Applied best practices. The script applies a number of best practices to optimize the performance of the PVS endpoint. Some are enabled by default, some are not. Disable Task Offload. The most generic best practice that applies for almost every PVS environment, disabling all of the task offloads from the TCPIP transport. See also CTX1. 17. Disable IPv. 6Although Citrix is working hard to get IPv. Citrix products, PVS does not support IPv. Disabling IPv. 6 on your PVS endpoints prevent intermittent failures. For each network adapter the IPv. This utility is included in the download. Also, slow boots could occur due to IPv. See also this Tech. Net article. Disable TSO and DMA on Xen. Tools. When youre running your PVS endpoints on Citrix Xen. Server 5. 0 or 5. This is a known bug thats solved in a hotfix of Xen. Server 5. 6. See also CTX1. Increase UDP Fast. Crystal Reports 8.5 Activex Designer Runtime Library. Send threshold. For every UDP packet larger than 1. Windows network stack waits for a transmit completion interrupt before sending the next packet. Unlike for earlier releases, v. Sphere 5. 1 does not provide a transparent workaround of the situation. See also KB2. 04. Set multiplication factor to the default UDP scavenge value. High CPU usage occurs when a Windows Server 2. R2 based server is under a very heavy UDP load. This issue occurs because a table is too aggressively scavenged. See also KB2. 68. Icons are hidden. To prevent users from accessing system tools like the PVS target device software or VMware tools the icons are removed. Disable VMware debug driver. The virtual machine debug driver was disabled for this virtual machine message displays in event log. The virtual machine debug driver is not required in an ESX host. The driver is used for recordplay functions in Fusion and Workstation products. See also KB1. 00. Receive Side Scaling is disabled. VMXNET3 resets frequently when RSS is enabled in a multi v. CPU Windows virtual machine. When Receive Side Scaling RSS is enabled on a multi v. CPU Windows virtual machine, you see Net. Port messages for repeating MAC addresses indicating that ports are being disabled and then re enabled. See also KB2. 05. Remove non present NICs. After removing a network adapter for instance to replace an E1. Windows machine. The network adapter is not visible in device manager see KB2. IP stack and, most likely, has a higher priority. As a result the PVS target device software is unable to communicate with the streaming server. All Ethernet adapters that are not present on the machine are removed using the Dev. Con utility. The utility is included in the download, in case you lost it make sure you use version 6. Windows 7 WDK for x. Default setting Enabled Network Adapter specific optimization. For each network adapter E1. TCP offloading. Depending on the network adapter this has different names and some have more than one feature to disable. Default setting Enabled. The script changes the following sets the following properties Network Adapter. Property. Value. E1. VMwareLarge Send Offload IPv. Disabledvmxnet. 3 VMwareIPv. Giant TSO Offload. Disabled. IPv. 4 TSO Offload. Disabledxennet. 6 Xen. ServerLarge Send Offload Version 2 IPv. Disabledvmbus Hyper VLarge Send Offload Version 2 IPv. Disabled. Missing an adapter Drop me an e mail atemail protectedAll other properties listed in the Ethernet Adapter Properties dialog can be changed as well. All known properties and values are provided in the script, all you have to do is uncomment removing the character and set the value you want. Do NOT enable options before youve tested this first and understand what the implications are. Example You want disable IPv. Checksum Offload for the vmxnet. The default value is 3 Tx and Rx Enabled, to disable the feature you need to set the value to 0. In the script go to lines 2. Set Item. Property and set the value 0 and the end of the statement. IPv. 4 Checksum Offload. Yatra Affiliate Program Review. Registry. Key. Name IPChecksum. Offload. IPv. 4. Tx Enabled. Rx Enabled. Tx and Rx Enabled default. Set Item. Property Path HKLM SYSTEMCurrent. Control. SetControlClass01 f 4. D3. 6E9. 72 E3. 25 1. CE BFC1 0. 80. 02. BE1. 03. 18, 0 D4 f int. NICid Name str. Registry. Key. Name Value 0 IPv. Checksum Offload str. Registry. Key. NamePChecksum. Offload. IPv. 4 0 Disabled 1 Tx Enabled 2 Rx Enabled 3 Tx and Rx Enabled defaultSet Item. Property PathHKLM SYSTEMCurrent. Control. SetControlClass01 f4. D3. 6E9. 72 E3. 25 1. CE BFC1 0. 80. 02. BE1. 03. 18,0 D4 fint. NICid Namestr. Registry. Key. Name Value0Tested platforms. The script is tested on multiple hypervisor platforms to ensure it covers the majority of the environments. In case your missing a hypervisor or a version feel free to contact me at email protected. Citrix Xen. Server 6. Microsoft Hyper V 2. R2VMware ESX 4. Usage and download. The script runs without arguments but requires elevated privileges, this is enforced by the script. Within the script you can enable disable the features in the global options section eg removing hidden NICs or unbinding IPv. If wanted you can set advanced NIC properties by uncommenting the statement and providing the new value. The script is best executed before the v. Disk is uploaded but can also be run in Private mode starting v. You can download the files here. Optimize. PVSendpoint. Thanks. I would like to thank the following people who where kind enough to test the script and provide me with feedback and test data Kees Baggerman link. Wilco van Bragt link. Iain Brighton link. Tom Gamull link. Andrew Morgan link. Shaun Ritchie link. Jeff Wouters link. Bram Wolfs link. Jonathan Pitre link. Julien Destombes link. At the time Ingmar wrote this article he worked for Pepper. Byte as a Senior Consultant up to May 2. His work consisted of designing, migrating and troubleshooting Microsoft and Citrix infrastructures. He was working with technologies like Microsoft RDS, user environment management and performance monitoring. Ingmar is User Group leader of the Dutch Citrix User Group Du. CUG. RES Software named Ingmar RES Software Valued Professional in 2. More Posts Website.