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Getting Started with Citrix NetScaler
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Deploy a Citrix NetScaler VPX instance
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Install a NetScaler VPX instance on Microsoft Hyper-V servers
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Install a NetScaler VPX instance on Linux-KVM platform
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Prerequisites for Installing NetScaler VPX Virtual Appliances on Linux-KVM Platform
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Provisioning the NetScaler Virtual Appliance by using OpenStack
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Provisioning the NetScaler Virtual Appliance by using the Virtual Machine Manager
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Configuring NetScaler Virtual Appliances to Use SR-IOV Network Interface
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Configuring NetScaler Virtual Appliances to use PCI Passthrough Network Interface
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Provisioning the NetScaler Virtual Appliance by using the virsh Program
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Provisioning the NetScaler Virtual Appliance with SR-IOV, on OpenStack
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Configuring a NetScaler VPX Instance on KVM to Use OVS DPDK-Based Host Interfaces
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Upgrade and downgrade a NetScaler appliance
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Downgrade a NetScaler standalone appliance
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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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Use source IP address of the client when connecting to the server
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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 14: ShareFile wizard for load balancing Citrix ShareFile
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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 NetScaler Appliance and Cisco IOS Device
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CloudBridge Connector Tunnel Diagnostics and Troubleshooting
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Downgrade a Citrix NetScaler standalone appliance
You can downgrade to any earlier release on a standalone Citrix NetScaler by using the CLI. Downgrading using the GUI is not supported.
Note
Loss in configuration might occur when downgrading. You should compare the configurations before and after the downgrade, and then manually reenter any missing entries.
Procedure to downgrade a standalone Citrix NetScaler
Follow the steps given below to downgrade a Citrix NetScaler standalone appliance running release 12.0 to an earlier release.
In this procedure, <release> and <releasenumber> represent the release version you are downgrading to, and <targetbuildnumber> represents the build number that you are downgrading to.
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Open an SSH connection to the Citrix NetScaler by using an SSH client, such as PuTTY.
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Log on to the Citrix NetScaler by using the administrator credentials. Save the running configuration. At the prompt, type:
save config
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Create a copy of the ns.conf file. At the shell prompt, type:
cd /nsconfig
cp ns.conf ns.conf.NS<currentbuildnumber>
You should backup a copy of the configuration file on another computer.
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Copy the <releasenumber> configuration file (ns.conf.NS<releasenumber>) to ns.conf. At the shell prompt, type:
cp ns.conf.NS<releasenumber> ns.conf
Note: ns.conf.NS<releasenumber> is the backup configuration file that is automatically created when the system software is upgraded from release version <releasenumber> to the current release version. There may be some loss in configuration when downgrading. After the appliance restarts, compare the configuration saved in step 3 with the running configuration, and make any adjustments for features and entities configured before the downgrade. Save the running configuration after making the changes.
Important: If routing is enabled, perform step 5. Otherwise, skip to step 6.
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If routing is enabled, the ZebOS.conf file will contain the configuration. At the shell prompt, type:
- cd /nsconfig
- cp ZebOS.conf ZebOS.conf.NS
- cp ZebOS.conf.NS<targetreleasenumber> ZebOS.conf
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Change directory to /var/nsinstall/<releasenumber>nsinstall, or create one if it does not exist.
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Change directory to build_<targetbuildnumber>, or create one if it does not exist.
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Download or copy the installation package (build-<release>-<targetbuildnumber>.tgz) to this directory and extract the contents of the installation package.
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Run the installns script to install the new version of the system software. The script updates the /etc directory.
If the configuration file for the build that you are downgrading to exists on the appliance, you are prompted to load that configuration, as shown in the following figure.
Figure 1. Downgrade menu if configuration file exists
If the free space available on the flash drive is insufficient to install the new build, the Citrix NetScaler aborts the installation. Manually clean up the flash drive and restart the installation.
Example:
login: nsroot
Password: nsroot
Last login: Mon Apr 24 02:06:52 2017 from 10.102.29.9
Done
> save config
> shell
root@NSnnn# cp ns.conf.NS10.5 ns.conf
root@NSnnn# cd /var/nsinstall
root@NSnnn# mkdir 10.5nsinstall
root@NSnnn# cd 10.5nsinstall
root@NSnnn# mkdir build_57
root@NSnnn# cd build_57
root@NSnnn# ftp 10.102.1.1
ftp> mget build-10.5-57_nc.tgz
ftp> bye
root@NSnnn# tar -xzvf build-10.1-125_nc.tgz
root@NSnnn# ./installns
installns version (10.5-57) kernel (ns-10.5-57.gz)
...
...
...
Copying ns-10.5-57.gz to /flash/ns-10.5-57_nc.gz ...
Changing /flash/boot/loader.conf for ns-10.5-57 ...
Installation has completed.
Reboot NOW? [Y/N] Y
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