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Deploying and Optimizing HDX USB Redirection in XenDesktop 5.5
Ramon Scott Lead Escalation EngineerMay 8, 2012
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Presentation Goals
3
Review The Feature
Instruct On How To Configure
Provide Troubleshooting Resources
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Agenda
• Overview of the USB Technology
• Feature Components
• Deployment Checklist
• Configuring USB redirection
• Troubleshooting USB redirection
• Optimization
• Case study: USB redirection of Imaging Device
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VirtualChannels
VirtualChannels
USB Overview
Receiver VDA
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How Do We Redirect Devices ?
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How are devices categorized?
• Descriptors
○ Vendor ID, Product ID, Class ,Subclass ,etc
• Classes
○ Mass Storage, Image, HID etc.
Feature Components
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Feature Components
Deployment Checklist
Citrix Receiver Polices Configured
HDX Policies Configured in the Console
Verified Device is not Redirected natively
Verified Conflicting Polices are disabled
Verified Software supports redirection method
CONFIGURING USB REDIRECTION
What are the Five Core questions ?
1. How should the Receiver handle existing devices?
2. How should the Receiver handle new devices?
3. Should we list USB devices in the Desktop Viewer?
4. What devices types should be redirected automatically ?
5. What devices are allowed or blocked ?
Receiver Configuration: Desktop ToolBar GUI
Receiver Configuration: Desktop Toolbar GUI
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Receiver Configuration: Citrix Connection Center
Receiver Configuration: Computer Policy ADM Template
USB Device Classes Allowed by Default
Different classes of USB device are allowed by the default USB policy rules:
○ Audio (Class 01)
○ Physical Interface Devices(Class 05)
○ Still Imaging (Class 06)
○ Printers (Class 07)
○ Mass Storage (Class 08)
○ Content Security (Class 0d)
○ Video (Class 0e)
○ Personal Healthcare (Class 0f)
○ Application and Vendor Specific (Classes fe and ff)
USB Device Classes Denied by Default
Different classes of USB device are denied by the default USB policy rules:
○ Communications and CDC Control (Classes 02 and 0a)
○ Human Interface Devices (Class 03)
○ USB Hubs (Class 09)
○ Smart Card (Class 0b)
○ Wireless Controller (Class e0)
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Device Rules
Syntax:
{Allow: | Deny:} followed by any number of
<tag>=<value> qualifiers. Multiple rules should be
separated by semicolons. Comments start at '#'
and continue until a semicolon.
For example 'Allow: VID=1234 PID=5678 #
Comment ; Deny: Class=03'.
Allow: VID = 045E PID = 00F9 # Microsoft USB
Keyboard; Deny: Class = 03 #Deny other HID’s'
Receiver Configuration: User Policy ADM Template
Receiver Configuration:Registry
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\ICA Client\GenericUSBHKEY_LOCAL_MACHINE\SOFTWARE\Policies\Citrix\ICA Client\GenericUSB\Devices\VID091E PID2353 "AutoRedirect"=dword:00000001
• How to Configure Automatic Redirection of USB Devices
○ http://support.citrix.com/article/CTX123015
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DSC Console ConfigurationHDX Device Rules
Examples of administrator-defined USB policy rules:Allow: VID=1230 PID=0007 # ANOther Industries, ANOther Flash DriveDeny: Class=08 subclass=05 # Mass StorageTo create a rule that denies all USB devices, use “DENY:” with no other tags.
Troubleshooting USB redirection
Troubleshooting USB redirection
• CdfControl
• HDXMonitor
• DebugView
• UVCView
• Provides a diagnostic conduit to all Citrix binaries.
• Lots of new features, frequently updated
• Now allows remote tracing and XenDesktop log review
• Article: CTX111961
Common Diagnostic Facility (CDF) Tracing
Recommended Modules•Portica_Service_USB•Policy_ICA_VC•PE_Library_CtxCppBase•PE_Service_CtxSvcHost
• Reports real-time status
• Provide Network Performance statistics
• Reports the active USB device rules
• Delivers USB filtered Event log messages
Citrix HDX Monitor
Optimization:Configuring Bandwidth Limits
• Client USB device redirection bandwidth limit
• Client USB device redirection bandwidth limit percent
Optimization:Adjusting Priority of Virtual Channel
How to Change Virtual Channel Priority in XenDesktop 5 - CTX128190
Case study: Redirecting a Scanner [Imaging Device]
Case study:USB redirection of Imaging Device
Background:
•Poof of Concept Pilot in which scanning was a key requirement for the move to
XenDesktop 5.5
•Issues Reported :
Scanning Failed via Twain redirection
Scanning failed via USB Redirection
Case study:USB redirection of Imaging Device
Troubleshooting TWAIN:
•Verified Polices on Server
•Reviewed Generic USB Polices for conflicts
•Reviewed endpoint configuration
○ Removed USB Policies
•Reviewed software used to test
Case study on USB redirection of Imaging Device
Resolution: TWAIN
•Document Process
○ To enable Citrix Twain Policy
○ Deploy correct driver to endpoint
○ Review if software is Twain aware
Case study:USB redirection of Imaging Device
Troubleshooting USB Redirection:
•Verified HDX Polices in Delivery Services Console
•Reviewed Generic USB Polices on endpoint
•Attempt with Basic Configuration
•Reviewed endpoint configuration
○ Removed USB Policies
•Reviewed software used to test
Case study on USB redirection of Imaging Device
Resolution: Generic USB Redirection
•Document Process
○ To disable Citrix Twain Policy
○ Deploy correct driver to VDAs
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Resources Covered
•How to Configure Automatic Redirection of USB Devices
•USB Class Codes
•How to Change Virtual Channel Priority in XenDesktop 5
•HDX Monitor
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Resources Covered (continued)
•CDF Control
•DebugView
•UVCView
Q&A
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Presentation Goals: Recap
41
Review The Feature
Instruct On How To Configure
Provide Troubleshooting Resources