How to troubleshoot / Useful command around openVswitch in XenServer

This article provides information about ovs and command that can be used to troubleshoot ovs related issues...

Supported NFS protocols and how to identify which protocol is being used

Q. What are the supported version of NFS protocol ? How to identify which being used now ? A. NFSv3 is supported with XenServer 6.1,6.2,6.5 and XenServer version 7 supports NFSv3 and NFSv4.If the underlying storage array does not support NFSv4, NFSv3 will be used to mount the share. In order to...

How to create a raw VDI on XenServer ?

Sometimes when performance is important over other functionalities like snapshot fast clone which are provided by the VHD layer, we need to create raw VDI...

How to collect Logs for Citrix Workspace app for Linux?

This article describes the commands that can be run to collect informationand logs needed to troubleshoot Linux Receiver issues...

Capturing a continuous network trace( tcpdump ) on XenServer without filling the dom0

In certain situation, we are not sure when will the issue be reproduced and need to keep the network capture running. If the capture is run directly, it may fill up the dom0 filesystem and can crash the XenServer Host...

Generated troubleshooting for NFS related issues on XenServer

This article will give you guidelines for troubleshooting NFS SR related issues on XenServer...

Citrix Gateway VPN Users are Unable to Resolve IPv4 DNS When ISP has IPv6 Enabled

Citrix Gateway VPN users are not able to resolve IPv4 DNS when their ISP has IPv6 enabled...

HTTP 1.1 Gateway timeout error while accessing internal websites from Secure Web

HTTP 1.1 Gateway timeout error while accessing internal websites from Secure Web when traffic is tunneled through the NetScaler. This issue occurs when the MDX Policy is set for Secure Browse. If the preferred VPN mode on the app is set to FULL VPN TUNNEL, then the issue will not occur...

XNC: How to Block any Device which does not use SecureMail Agent

Question : XNC: How to Block any Device which does not use SecureMail Agent Answer : Rule = Static+XDM: Block mode Made the static XNC rule for "WorxMail" agent. The Above step can also be achieved by allowing Secure Mail agent as "Secure Mail/Secure Mail" in the XNC RegEx build. Perform "Implici...

How to find the disk associated to a VM from XenServer CLI

While troubleshooting storage issues, we might need to get the VM's disk and its associated Virtual block devices . This article will help to get the desired details from the VM...

How to Configure NetScaler Gateway Preauthentication EPA Scan for Antivirus and Firewall Check

This article describes how to configure NetScaler Gateway preauthentication EPA scan for antivirus and firewall check...

SF Web Page inaccessible after changing Base URL

- Once the SF is configured, there might be a need to change the Base URL. However, the SF page becomes inaccessible and throws below error - You might also get "Cannot complete your request" on this page...

Set the device_id param on virtual machine

How to set the deviceid param on virtual machine...

XenMobile Duplicate MAM ID issue

Deployments of XenMobile 10.x may encounter an issue where Enterprise enrolled devices are not correctly associated with the appropriate MAM ID for the device. This results in issues where devices end up in a state of ‘MDM no MAM’ or ‘Cannot install applications, despite seeing them listed in...

GPU tab on XenCenter is not visible for Citrix Hypervisor 8.2 CU1 hosts

We are not able to see the GPU tab in XenCenter. However we are able to run commands like nvidia-smi and xe vgpu-list...

Bad performance over SSL protocol on NetScaler VPX 11.0 and VPX 10.5 release

Symptoms: Customer experiencing performance over SSL protocol on NetScaler VPX 11.62.10 in one arm deployment. Environment: We have NS VPX 1000 Platinum license no packet drops caused by rate limiting and it's config spec is 4vCPUs and 4GB of RAM, NIC 1000E full duplex speed. The NS appliance is...

How to Enable AuthManager logging in Citrix Workspace App for Linux

This article describes the procedure to enable AuthManager daemon logging which is responsible for Authentication of the client with the WebInterface/Storefront. This will be useful in troubleshooting Authentication Issues...

pvcreate --restorefile fails "/dev/sdx device not found or ignored by filtering" in XenServer

When trying to restore the lvm metadata on a Physical volume from backup using the command pvcreate --restorefile, it is failing with the error /dev/sdx device not found...

XenMotion Compatibility Requirements

When migrating a VM with XenMotion or Storage XenMotion, the new VM host must meet the followingcompatibility requirements in order for the migration to proceed: • XenServer Tools must be installed on each VM that you wish to migrate. • The target host must have the same or a more recent version ...

How to Verify Active Users or ICA Users on Citrix Gateway

This article describes how to verify Active Users or ICA User on Citrix Gateway...

Error:"An SSL connection to the server couldn't be established" when using Workspace App for Linux

When trying to authenticate to a StoreFrontserver using the StoreFrontURL you get the error: An SSL connection to the server couldn't be established because the server's certificate was not trusted...

Error: Logical Volume mount/activate error when trying to plug the Local Storage

After a server crash, the Local storage is unplugged and when trying to plug it back it gives the following error xe pbd-plug uuid=xxxx-xxxxxx-xxxxx-xxxxxError code: SRBACKENDFAILURE52Error parameters: , Logical Volume mount/activate error opterr=FSCK failed on...

How to take a XenServer toolstack (XAPI) database dump and view it

XenServer stores the vital information related to objects such asVM, VIF, VDI, PBD in an XMLformat file under /var/xapi/state.db.Thisfile is synced between pool membersat regular intervals to maintain aconsistent view of the XenServer pool. We recommend that you back up this XAPIdatabase file. Th...

Compatibility of NetScaler with TLS 1.1 - 1.2 and Client Authentication with Citrix Receiver

NetScaler GatewayNG 11.0 version enabled for Client CertificateCC authentication with TLS 1.1,TLS1.2 enabled. 2. Citrix Receiver 4.3 or 4.4 installed on Client Machine. 3. During logon to Gateway, browser pop up to select client Certificate and then successfully login to enumerate the...

XenCenter System Alerts

The following table displays the system events/conditions that will a trigger an alert to be displayed in XenCenter System Alerts window. XenCenter System Alerts You can view a range of different types of alert in theSystem Alertswindow, including: Performance alerts. Performance alerts may be...

How to view Exchange Archive Folders within Secure Mail

Needs assistance in finding the archive folder in Secure Mail for Xenmobile...

How to capture network trace for a XenServer VM while booting up ?

In order to troubleshoot issues related to TFTP or DHCP, we may need to capture network traces during initial VM bootup. As Virtual interface is not loaded during initial bootup phase of VM, we need to capture trace on the tap device...

vhd-util tool to inspect the VHD headers of a VHD

vhd-util is a native utility of a XenServer used to inspect the VHD headers of a VHD. This will be useful to inspect the parent child relationship in VHD files...

Upgrading to Ubuntu 14.04, RHEL 7 and CentOS 7 Guests

Customers who wish to upgrade existing Linux guests to versions which now operate in HVM mode that is, RHEL7, CentOS 7, and Ubuntu 14.04 should perform an in-guest upgrade. At this point, the upgraded Guest will only run in PV mode - which is not supported and has known issues. Customers should r...

Measure storage performance on XenServer using dd ?

dd is a native linux command also available on XenServer that can be used to measure the performance of a block device like /dev/sda at a block level. We can use this command to troubleshoot storage performance issues within the Host as well as the guest while clubbing it with other tools like...

All paths in multipath are not visible in XenServer after a reboot

After a XenServer Host reboot, some of the paths are not visible when typing the command multipath -ll...

Netscaler Gateway license not getting applied and ICA user count shows as 0

Netscaler Gateway license not getting applied and ICA user count shows as 0 in GUI and CLI both. show ns license output shows as below: Http DoS Protection: YES Dynamic Routing: YES Content Filtering: YES Integrated Caching: NO SSL VPN: YES Maximum users = 5 Maximum ICA users = 0...

How to Identify the devices representing VHD files from iostat output ?

When measuring i/o performance of a VM, it is necceary to understand the i/o happening at the vdi layer. This article will help in relating the devices in iostat output to corresponding VHD...

Error when trying to disable HA on XenServer

When trying to disable HA for the pool, we are getting the following error xe pool-ha-disableThe uuid you supplied was invalid.type: VDIuuid: 87ca6afc-b0ad-4e54-bb5e-313dddd77ea2...

Error: "xenopsd internal error: Unix.Unix_error(Unix.ENODEV, "write", "") importing VM on XenServer

After exporting a VM into an xva format and trying to import the VM, VM import is successful, but when trying to start the VM, it fails with the following error in the /var/log/xensource.log xenopsd internal error: Unix.UnixerrorUnix.ENODEV, "write", ""...

How to connect to a console of a Linux VM from XenServer Host Console

Sometimes it might be necessary to connect to the console of VM via command line when SSH and XenCenter console is not working. This article describe the process for it...

How to confirm the status of HBA inserted into XenServer Host

Inorder for Storage repositories like LVMOBHA to connect properly, first step is to confirm if the HBA are connected properly to the Host. This article will help in confirming that...

How to check the bond status with OpenVswitch

When the bond status are flapping, it might be necessary to check what the kernel sees. This article describes some useful commands to check Bond status around OVS...

Generic USB redirection for USB Mass storage not working

How to enable Generic Device redirection for Imation IronKey USB mass storage device into the WIN10 VDI...

Error- "cannot contact store" from receiver for internal users

Users are not able to connect to Storefront store internally via Citrix Receiver. However, users are able to access the store externally via the Netscaler...

How to Install Storefront on a Non-System Drive

Install Storefront on a non-system drive...

Smart Access Control Policy Not Working on XenApp Server

A customer was trying to launch a Citrix session and trying to copy data from the the Citrix session to clipboard on their local machine. They have a smart access policy on the XenApp server to block this clipboard functionality when traffic is coming from Access Gateway Citrix Gateway:...

How to Add AutoDiscovery Record for Citrix Endpoint Management

This article details on how to add the AutoDiscovery Record...

How to Capture a Network Trace from a XenServer Physical Interface, Virtual Bridge, and VM Virtual Interface

This article describes how to capture a network trace from a XenServer physical interface, Virtual Bridge, and Virtual Machine Virtual Interface...

Error: “Preparation of the Master VM Image failed” When UPDATING a Catalog

NOTE : This article contains information about UPDATING a CatalogONLY. For information on CREATING a Catalog see: CTX140734 Updating a catalog might fail during Image Preparation because of many reasons. In order to identify what caused the failure we need to collect preparation Image logs...

Error: "An Unexpected Error Occurred. " on Receiver 4.4.1

This article is intended for Citrix administrators and technical teams only.Non-admin users must contact their company’s Help Desk/IT support team and can refer toCTX297149for more information Receiver 4.4-"An Unexpected Error Occurred. The AuthManager Log or trace files my contain information...

Does domain passthrough authentication work with NetScaler Gateway?

Question: Does domain pass through authentication work with NetScaler Gateway, like forwarding the windows machine credentials so that user do not have to login and does single sign onlatest update for 12.0.58.x? Answer: No, Domain pass through does not work with Netscaler Gateway. Authentication...

Mount cifs and nfs storage from CLI on xenserver

Mount cifs and nfs storage from CLI on xenserver...

How to Capture SSL Master Keys When Running an nstrace on NetScaler

This article describes how to capture SSL master keys when running an nstrace on NetScaler Background From NetScaler 11.0-66+ and 11.1/12.0 all builds, the "start nstrace" command has a new parameter, -capsslkeys, with which you can capture the SSL master keys for all SSL sessions. If the...

Error: You Cannot Access this Session Because no License are Available

Launching application results in "Error: You Cannot Access this Session Because no License are Available" Check in Licensing Server - under C:\Program Filesx86\Citrix\Licensing\Myfiles - if the file 'Citrixstartup.lic' is missing...