Which of the following statements about VRRP fast switchover is incorrect?

The statement that VRRP fast switchover can only monitor one session at a time is incorrect because VRRP (Virtual Router Redundancy Protocol) is designed to work with multiple Bidirectional Forwarding Detection (BFD) sessions concurrently. This capability enhances network resilience and availability by allowing a VRRP group to monitor several BFD sessions simultaneously, providing faster detection of failures across different paths or devices.

Monitoring multiple sessions improves fault tolerance, as it enables the VRRP group to respond more quickly to link or device failures. If any of the monitored BFD sessions detect a failure, it can promptly trigger a failover to a backup router, thereby maintaining the reliability of the routing process. Thus, the notion that only one session can be monitored is fundamentally inaccurate and does not reflect the capabilities of VRRP in conjunction with BFD.

In contrast, changes in BFD session status do indeed trigger switchover notifications, indicating that the protocol can respond dynamically and adjust its active path based on current network conditions. Additionally, the priority of the VRRP group can change with BFD status to ensure that the most appropriate router takes over the active role when required.