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Common Pitfalls when Setting up a NetScaler for the First Time

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Sometimes setting up a NetScaler may seem an impossible. What do you do when you hit a roadblock at an early stage?

In this session, Ronan will step through the most common issues you can experience at an early stage of your NetScaler deployment, and how to diagnose them using on-box tools.

During this session you will learn:
- Troubleshooting basic setup issues
- Health Checks
- Introducing redundancy and removing single point of failure
- Logging – what happened historically

Published in: Technology, Business
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Common Pitfalls when Setting up a NetScaler for the First Time

  1. 1. May 2013Ronan O’Brien – EMEA Field ReadinessCitrix Support SecretsWebinar SeriesCommon Pitfalls when Setting up a NetScaler forthe First Time
  2. 2. © 2012 Citrix | Confidential – Do Not DistributeBIO• Rónán O’Brien – EMEA NetScaler Field Readiness• Working exclusively with NetScaler since 2006• Training Content & Lab Development• Training Delivery in Support, Field & Synergy• Support mentor• Deliver Monthly webinars in the NetScaler MasterClass• http://www.citrix.com/events/netscaler-master-class.html• Set a reminder to sign up each month.
  3. 3. © 2012 Citrix | Confidential – Do Not DistributeAgenda• Connecting to a NetScaler• Architecture• Licensing• IP Addresses• USIP (here be dragons!)• Policy Expressions• Load Balancing• Diagnostics• Popping the hood
  4. 4. © 2012 Citrix | Confidential – Do Not DistributeConnecting to a NetScaler• Connection options• NSIP• SNIP (when configured)• Console• LOM}InterfaceVLANRoutingFirmware UpgradesACLsNSIP
  5. 5. © 2012 Citrix | Confidential – Do Not DistributeTraffic Flow Architecture5Vserver ASNIPVIPClient IP Server IP
  6. 6. © 2012 Citrix | Confidential – Do Not DistributeLicensing• License files are for features, or throughput.• Must end in .lic , and be located in: /nsconfig/license• Loaded at boot time only for the MPX Platforms.• ‘Warm’ reboot will load a new license on an MPX – savestime on a reboot – but connectivity will be lost.• Licenses for the SDX do not require a reboot.• The license log file will tell you everything (I,.e.Why isn’tthis feature licensed?)
  7. 7. © 2012 Citrix | Confidential – Do Not DistributeLicense Troubleshootingincl. 5 free CCUGUI view of licenses: http://blogs.citrix.com/2012/03/02/netscaler-lizenzen-gui-sichtweise/NetScaler VPX Licensing Guide: http://support.citrix.com/article/ctx122426
  8. 8. © 2012 Citrix | Confidential – Do Not DistributeLicense checkONLY NetScaler Gateway (a.k.a. AGEE) functions are licenced byfree-text based HOSTNAMEHow to set Hostname on NetScaler Gateway:> set ns hostname vpn.training.local> save config> shell echo hostname=vpn.training.local > /flash/nsconfig/rc.conf> reboothttp://support.citrix.com/article/ctx113028
  9. 9. © 2012 Citrix | Confidential – Do Not DistributeLicense checkDemo or trial licenses are mapped to the MAC address of the appliance.
  10. 10. © 2012 Citrix | Confidential – Do Not DistributeIP Addresses you *must* configureNetScaler IP (NSIP)Subnet IP (SNIP)Virtual IP (VIP)http://www.citrix.com/tv/#videos/1066
  11. 11. © 2012 Citrix | Confidential – Do Not DistributeUse Source IP• Uses Client Sourse IP and NS MAC to initiate TCPconversation to the back end.• Configured on the service.• If traffic is not routed back through the NetScaler, theconnection fails
  12. 12. © 2012 Citrix | Confidential – Do Not DistributeUse Source IP12Vserver ASNIPVIPClient IP Server IP
  13. 13. © 2012 Citrix | Confidential – Do Not DistributeUse Source IP• When adding a service, itinherits settings from whatis globally enabled. (e.g.USIP, Compression etc.)• If you create a service witha setting turned off, and thenenable the setting – theservice will not re-inherit.• This is by design.
  14. 14. Policy ExpressionsLet’s hit a NetScaler!
  15. 15. © 2012 Citrix | Confidential – Do Not DistributePolicy Expressions1. Creating Policy Expressions.2. Verify that they are being hit3. Troubleshooting Policy Expressions4. Troubleshooting Rewrite actions
  16. 16. Load BalancingLet’s hit a NetScaler!
  17. 17. © 2012 Citrix | Confidential – Do Not DistributeLoad Balancing1. Why is my service down?2. Is load balancing working?(It is – It just looks like it isn’t  )3. Why is it stuck in Round Robin?
  18. 18. On-Box Diagnostic ToolsLet’s hit a NetScaler!
  19. 19. © 2012 Citrix | Confidential – Do Not DistributeDiagnostics1. Show Tech Support2. Performance Monitoring3. Network tracing4. Connection Viewer5. Config Comparison6. Persistence Table
  20. 20. © 2012 Citrix | Confidential – Do Not DistributeAboutCitrix ServicesCitrix Services make sureyou succeed with yourvirtualization programs.How we can helpCitrix Education – The fastest, most efficient way toget your team the virtualization skills they need. Online,on-site or in class.citrix.com/trainingCitrix Consulting – Intensive engagements forcomplex, critical or just plain massive projects.citrix.com/consultingCitrix Support – Always-on support services thatleverage everything we know about best-practicedeployment and maintenance.citrix.com/supportEducate | Guide | Support | Succeed
  21. 21. © 2012 Citrix | Confidential – Do Not Distribute• 40 insider troubleshooting tips• Covering XenDesktop, XenServer, XenApp and NetScaler• Citrix Support top engineers• FREE eBook• Citrix Auto Support• Now available!Secrets of the Citrix Support Ninjas
  22. 22. © 2012 Citrix | Confidential – Do Not DistributePremier Support CalculatorCheck it out
  23. 23. © 2012 Citrix | Confidential – Do Not DistributeNext Webinar: June• Title: Top Troubleshooting Tips and Techniques for Citrix XenServerDeployments• Description: This session will provide an expert insight into the most commonissues encountered by Customers, Partners and Support engineers. It’s afeature packed agenda which gets to the point quickly and concentrates on theissues we encounter continuously with XenServer deployments.• When: June 27th• Registration Now!
  24. 24. Work better. Live better.

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