In Huawei’s M-LAG (Multi-Chassis Link Aggregation), the heartbeat link (or peer-link) ensures communication between member devices. A fault in this link can impact M-LAG operation. Let’s evaluate each statement:

A. The fault that two master devices exist cannot be detected in the case of a peer-link fault:This is false. A peer-link fault can be detected, and mechanisms like dual-master detection (e.g., via Inter-Chassis Communication Link or ICC) can identify if both devices assume master roles, triggering corrective actions.FALSE.

B. An alarm is triggered:This is true. A peer-link fault generates an alarm to notify administrators, as it’s a critical failure in M-LAG operation, per Huawei’s fault management system.TRUE.

C. The fault protection mechanism is triggered:This is true. Huawei M-LAG includes protection mechanisms (e.g., failover to backup links or shutdown of conflicting interfaces) to mitigate peer-link faults and maintain service continuity.TRUE.

D. Services are affected:This is false. With proper configuration (e.g., redundant links or fast failover), services should not be affected by a peer-link fault, as M-LAG is designed for high availability. Impact depends on redundancy, but the design goal is uninterrupted service.FALSE.

Thus,A and Dare false statements because dual-master faults can be detected, and services are not necessarily affected with adequate redundancy.References:Huawei CloudEngine Series Switch Configuration Guide – M-LAG Fault Handling; HCIP-Data Center Network Training – M-LAG Reliability.