A Citrix Administrator is configuring a NetScaler high availability (HA) pair and needs to ensure that one Net Scaler is UP and primary at all times to ensure the business websites are always available.
What does the administrator need to do to ensure that the NetScalers still handle web traffic in the event that both nodes become unavailable or fail a health check?
To ensure that a NetScaler always remains UP and handles web traffic even if both nodes of a high availability pair become unavailable or fail a health check, the administrator needs to configure HA Fail-safe mode on each NetScaler independently. Enabling Fail-safe mode on both nodes ensures that at least one node will always take over the primary role and continue to serve the web traffic in case the other node fails.
https://docs.citrix.com/en-us/netscaler-gateway/12/high-availability/ng-ha-fail-safe-mode-tsk.html