In a Tier-1 Gateway configured in Active-Standby High Availability Mode, which failover policy prevents the failed node from becoming active upon recovery?

In a Tier-1 Gateway configured in Active-Standby High Availability Mode, the failover policy that prevents the failed node from becoming active upon recovery is the Non-Preemptive policy. This policy ensures that if the primary node fails and then recovers, it will not automatically take back the active role. Instead, the active node remains in control until it is explicitly configured to relinquish that control, which typically involves manual intervention.

This approach can be beneficial in scenarios where re-establishing the original active node could create instability or could disrupt the service. By allowing the alternate node to remain active, it ensures continuity of service and potentially avoids oscillations between nodes.

In contrast, if a Preemptive policy were in place, the original active node would regain its active status automatically after recovering, potentially leading to unnecessary disruptions in service due to the node-switching process. Thus, the Non-Preemptive policy is designed to maintain higher availability and stability in the network environment.