To ensure that traffic is distributed to the other physical connection when one physical connection fails, you must configure health checks for VBRs.
Prerequisites
Background information
Alibaba Cloud sends a ping packet to the customer-side IP address of the on-premises
data center from each health check IP address every two seconds. If eight successive
ping packets on one leased line fail to give responses, the traffic is distributed
to the other leased line.

Note If Control Plane Policing (Copp) (such as Cisco devices) or Local Attack Defense Policy
(Huawei devices) is configured on the on-premises data center, health check packets
may be discarded and then the health check link shocks. We recommend that you cancel
the control side speed limitation on the network device of the on-premises data center.
