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Getting Started with Citrix ADC
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Deploy a Citrix ADC VPX instance
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Optimize Citrix ADC VPX performance on VMware ESX, Linux KVM, and Citrix Hypervisors
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Apply Citrix ADC VPX configurations at the first boot of the Citrix ADC appliance in cloud
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Install a Citrix ADC VPX instance on Microsoft Hyper-V servers
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Install a Citrix ADC VPX instance on Linux-KVM platform
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Prerequisites for Installing Citrix ADC VPX Virtual Appliances on Linux-KVM Platform
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Provisioning the Citrix ADC Virtual Appliance by using OpenStack
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Provisioning the Citrix ADC Virtual Appliance by using the Virtual Machine Manager
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Configuring Citrix ADC Virtual Appliances to Use SR-IOV Network Interface
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Configuring Citrix ADC Virtual Appliances to use PCI Passthrough Network Interface
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Provisioning the Citrix ADC Virtual Appliance by using the virsh Program
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Provisioning the Citrix ADC Virtual Appliance with SR-IOV, on OpenStack
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Configuring a Citrix ADC VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
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Deploy a Citrix ADC VPX instance on AWS
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Deploy a VPX high-availability pair with elastic IP addresses across different AWS zones
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Deploy a VPX high-availability pair with private IP addresses across different AWS zones
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Configure a Citrix ADC VPX instance to use SR-IOV network interface
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Configure a Citrix ADC VPX instance to use Enhanced Networking with AWS ENA
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Deploy a Citrix ADC VPX instance on Microsoft Azure
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Network architecture for Citrix ADC VPX instances on Microsoft Azure
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Configure multiple IP addresses for a Citrix ADC VPX standalone instance
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Configure a high-availability setup with multiple IP addresses and NICs
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Configure a high-availability setup with multiple IP addresses and NICs by using PowerShell commands
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Configure a Citrix ADC VPX instance to use Azure accelerated networking
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Configure HA-INC nodes by using the Citrix high availability template with Azure ILB
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Configure a high-availability setup with Azure external and internal load balancers simultaneously
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Configure address pools (IIP) for a Citrix Gateway appliance
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Upgrade and downgrade a Citrix ADC appliance
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Solutions for Telecom Service Providers
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Load Balance Control-Plane Traffic that is based on Diameter, SIP, and SMPP Protocols
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Provide Subscriber Load Distribution Using GSLB Across Core-Networks of a Telecom Service Provider
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Authentication, authorization, and auditing application traffic
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Basic components of authentication, authorization, and auditing configuration
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On-premises Citrix Gateway as an identity provider to Citrix Cloud
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Authentication, authorization, and auditing configuration for commonly used protocols
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Troubleshoot authentication and authorization related issues
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Exporting Performance Data of Web Pages to AppFlow Collector
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Session Reliability on Citrix ADC High Availability Pair
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Persistence and persistent connections
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Advanced load balancing settings
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Gradually stepping up the load on a new service with virtual server–level slow start
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Protect applications on protected servers against traffic surges
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Retrieve location details from user IP address using geolocation database
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Use source IP address of the client when connecting to the server
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Use client source IP address for backend communication in a v4-v6 load balancing configuration
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Set a limit on number of requests per connection to the server
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Configure automatic state transition based on percentage health of bound services
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Use case 2: Configure rule based persistence based on a name-value pair in a TCP byte stream
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Use case 3: Configure load balancing in direct server return mode
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Use case 6: Configure load balancing in DSR mode for IPv6 networks by using the TOS field
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Use case 7: Configure load balancing in DSR mode by using IP Over IP
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Use case 10: Load balancing of intrusion detection system servers
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Use case 11: Isolating network traffic using listen policies
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Use case 12: Configure Citrix Virtual Desktops for load balancing
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Use case 13: Configure Citrix Virtual Apps for load balancing
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Use case 14: ShareFile wizard for load balancing Citrix ShareFile
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Use case 15: Configure layer 4 load balancing on the Citrix ADC appliance
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Authentication and authorization for System Users
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Configuring a CloudBridge Connector Tunnel between two Datacenters
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Configuring CloudBridge Connector between Datacenter and AWS Cloud
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Configuring a CloudBridge Connector Tunnel Between a Datacenter and Azure Cloud
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Configuring CloudBridge Connector Tunnel between Datacenter and SoftLayer Enterprise Cloud
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Configuring a CloudBridge Connector Tunnel Between a Citrix ADC Appliance and Cisco IOS Device
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CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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Session reliability on Citrix ADC high availability pair
When a network disruption or a device failover occurs during an ICA session, session reconnection can use one of two mechanisms: session reliability or Auto Client Reconnect.
Session reliability. The preferred mode, is a smooth experience for the user. The disruption is barely noticeable for brief network interruptions.
Auto client reconnect. The fallback option, involves restarting the client. This mechanism is disruptive for the user and is not always supported.
Receivers can reconnect their ICA sessions seamlessly using the ICA session reliability feature, when HDX Insight is enabled. This feature works both in standalone and in a Citrix ADC HA pair configuration, and even when a Citrix ADC failover happens.
Note:
- Citrix ADC appliances must be running on software version 11.1 build 49.16 or later.
- You must not enable or disable session reliability mode when the Citrix ADC appliances have active connections.
- Enabling or disabling the feature when connections are still active causes HDX Insight to stop parsing those sessions after a failover occurs. It results in the loss of information about the sessions.
- Session reliability on a high availability setup is disabled by default for Citrix ADC software version 11.1 49.16 or later. Session reliability is supported on a high availability setup only if both the nodes of the setup run the same build (for example, release 11.1 build 53). In other words, session reliability is not supported on a high availability setup if both the nodes run different builds (for example, one node has release 11.1 build 53 whereas the other has release 11.1 build 56). Session reliability for SSL VDA is supported if the following conditions are met:
- The “EnableSRonHAFailover” parameter in the
set ica parameter
command must be YES.- The HTTPS must be used instead of HTTP while configuring the virtual server.
- When HDX Insight is enabled, basic encryption applications and desktops reconnect after high availability failover even if the EnableSRonHAFailover parameter is disabled.
To configure Session reliability by using CLI:
- At the command line, use the default system administrator credentials to log on to the system.
- To enable session reliability on HA failover, at the prompt, type:
set ica parameter EnableSRonHAFailover YES
- To disable session reliability on HA failover, at the prompt, type:
set ica parameter EnableSRonHAFailover NO
To Enable Session reliability on HA failover by using GUI:
- In a web browser, type the IP address of the primary Citrix ADC instance in the HA pair (for example, http://192.168.100.1).
- In User Name and Password, enter the administrator credentials.
- On the Configuration tab, navigate to System > Settings, and click Change ICA Parameters.
- In the Change ICA Parameters section, select Session Reliability on HA Failover.
- Click OK.
Limitations
- Enabling this feature results in increased bandwidth consumption which is due to ICA compression being turned off by the feature. And the extra traffic between the primary and secondary nodes to keep them in sync.
- This feature is supported in Active-Passive mode only. Active-Active mode is not currently supported.
- When HDX Insight is enabled, and session reliability on the HA knob is set to NO, only ACR reconnect mode is supported in the Citrix ADC high availability failover scenario. The HA knob does not disable session reliability if HDX Insight is disabled.
The Session Reconnect Semantics table is as follows:
Session reconnects semantics
Status | EnableSRonHAFailover Yes | EnableSRonHAFailover No (Default) |
---|---|---|
HDX Insight enabled | Session reconnect for ICA Session works | Session reconnect for ICA Sessions does not work |
HDX Insight disabled | Session reconnect for ICA Session works | Session reconnect for ICA Sessions works |
Points to note
- Session reliability for ICA sessions works out of the box with Citrix Gateway.
- Session reliability for ICA sessions does not work when both the following conditions are met:
- HDX Insight is enabled
- EnableSRonHAFailover is set to NO
- Setting the EnableSRonHAFailover knob to either YES or NO does not make any difference, when HDX Insight is disabled.
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