ADC

Upgrade a high availability pair

August 20, 2024

Contributed by:

C C

One of the requirements of Citrix ADC in a high availability setup is to install the same Citrix ADC software version (Release) on both the primary and secondary nodes. Therefore, ensure that the software is upgraded on both nodes.

You can follow the same procedure as upgrading a standalone instance to upgrade both the nodes in a high availability pair, although other considerations apply to upgrading a high availability pair.

Before you start a Citrix ADC firmware upgrade on an HA pair, read the prerequisites mentioned in the Before you begin section. Also, you need to consider a few HA-specific points.

Points to note

Upgrade the secondary node first and then the primary node. You can upgrade Citrix ADC using the CLI or GUI.

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If both the nodes in an HA setup are running different Citrix ADC software versions, the following functionalities are disabled:
- HA config synchronization
- HA command propagation
- HA synchronization of state service information
- Connection mirroring (connection failover) of sessions
- HA synchronization of persistence sessions information
Notes:

The functionality behavior changes as follows when both the nodes are running different builds (for example 8.x and 4.x) of the same NetScaler software version (for example 14.1):
- These functionalities are disabled if both the builds have different internal HA versions.
- These functionalities work fine if both the builds have the same internal HA versions.
Refer to the New internal HA version in Citrix ADC builds section to check if the internal HA version has changed in a Citrix ADC build.
Synchronization of the files in the All mode of the sync HA files command works successfully if the two nodes in an HA configuration are running different Citrix ADC software versions, or the two nodes are running different builds of the same version. For more information, see Synchronizing Configuration Files in High Availability Setup.

New internal HA version in Citrix ADC builds

The following table lists the NetScaler builds in which the internal HA version has changed:

Release 14.1	Release 13.1	Release 13.0	Release 12.1
Build 12.30	Build 50.23	Build 92.21	Build 65.35
Build 8.50	Build 49.15	Build 90.12	Build 62.27
Build 4.42	Build 48.47	Build 87.9	Build 61.19
	Build 45.64	Build 86.17	Build 60.19
	Build 37.38	Build 85.19	Build 59.16
	Build 33.54	Build 84.11	Build 58.15
	Build 30.52	Build 82.45	Build 57.18
	Build 27.59	Build 79.64	Build 56.22
	Build 24.38	Build 76.31	Build 55.24
	Build 21.50	Build 71.44	Build 50.31
	Build 17.42	Build 67.43	Build 49.37
	Build 12.51	Build 64.35
	Build 9.60	Build 61.48
	Build 4.44	Build 58.32
		Build 52.24
		Build 41.28

Upgrade a high availability pair by using the CLI

The upgrade process includes the following steps:

Upgrade software on the secondary node
Upgrade software on the primary node

The following illustration shows the procedure to upgrade software on the node:

localized image

Upgrade software on the secondary node

Upgrade the secondary node as described in Upgrade a Citrix ADC standalone appliance using the CLI.
Log in to the Citrix ADC CLI using the nsroot credentials.
Run the following command to display the state of Citrix ADC.
```
show ha node

```
The command output must show that the node is a secondary node and synchronization is disabled.
Run the following command to perform a force failover and takeover as primary node:
```
force failover

```

Here’s a sample configuration in the new primary node.

login: nsroot
Password: nsroot
Last login: Monday Apr  17 08:37:26 2017 from 10.102.29.9
Done
show ha node
        2 nodes:
1)      Node ID:      0
        IP:        10.0.4.2
        Node State: UP
        Master State: Primary
        ...
        Sync State: AUTO DISABLED
        Propagation: AUTO DISABLED
        ...
Done
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Upgrade software on the primary node

Note:

After completing the “Upgrade software on the secondary node” procedure, the original primary node is now a secondary node.

Upgrade the secondary node as described in Upgrade a Citrix ADC standalone appliance using the CLI.
Log in to the Citrix ADC CLI using the nsroot credentials.
Run the following command to display the state of the Citrix ADC.
```
show ha node

```
The command output must show that the node is a secondary node and the status of the node as UP.
Run the following command to perform a force failover to ensure that the node is a primary node:
```
force failover

```
Verify that the node is a primary node.

Here’s an example configuration of the new primary node and the new secondary node.

show ha node
        Node ID:      0
        IP:   10.0.4.11
        Node State: UP
        Master State: Primary
...
...
        INC State: DISABLED
        Sync State: ENABLED
        Propagation: ENABLED
        Enabled Interfaces : 1/1
        Disabled Interfaces : None
        HA MON ON Interfaces : 1/1
...
...
        Local node information
        Critical Interfaces: 1/1
Done

Show ha node
        Node ID:      0
        IP:   10.0.4.2
        Node State: UP
        Master State: Secondary
        ..
        ..
        INC State: DISABLED
        Sync State: SUCCESS
        Propagation: ENABLED
        Enabled Interfaces : 1/1
        Disabled Interfaces : None
        HA MON ON Interfaces : 1/1
        . . .
        . . .
        Local node information:
        Critical Interfaces: 1/1
Done
<!--NeedCopy-->

Upgrade a high availability pair by using the GUI

Follow these steps to upgrade a Citrix ADC pair in a high availability setup, by using the GUI:

Log in to the secondary node and perform the upgrade as described in the section “Upgrade a Citrix ADC standalone appliance by using the GUI” in Upgrade a Citrix ADC standalone appliance.
Log in to the primary node and perform the upgrade as described in the section “Upgrade a Citrix ADC standalone appliance by using the GUI” in Upgrade a Citrix ADC standalone appliance.

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Upgrade a high availability pair

August 20, 2024

Contributed by:

C C

August 20, 2024

Contributed by:

C C

Upgrade a high availability pair

Points to note

New internal HA version in Citrix ADC builds

Upgrade a high availability pair by using the CLI

Upgrade software on the secondary node

Upgrade software on the primary node

Upgrade a high availability pair by using the GUI

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