Scenario: A network engineer is managing a NetScaler environment that has two NetScaler devices running as
a high availability pair. The engineer must upgrade the current version from NetScaler 9 to NetScaler 10.5.
Which action must the engineer take?
A.
Upgrade the primary node and perform HA sync.
B.
Upgrade the secondary node and then upgrade the primary node.
C.
Upgrade the primary node and then upgrade the secondary node.
D.
Break the high availability pair, upgrade each NetScaler device, and then reconfigure high availability.
One of the requirements of the NetScaler appliances in a high availability setup is to install the same NetScaler software release on both appliances of the setup. Therefore, when software on an appliance is upgraded, ensure that the software is upgraded on both the appliances. In addition, to minimize any related outage, upgrade the software on the secondary appliance before proceeding with the primary appliance of the high availability setup.
https://support.citrix.com/article/CTX127455
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