The key difference between M-LAG and stacking in Huawei data center design lies in their control plane architecture and fault domains .

Option A is false because M-LAG does NOT have a centralized control plane . Instead, each device in an M-LAG pair maintains its own independent control plane , while synchronizing state information (such as MAC and ARP tables) over the peer-link. This distributed control design improves reliability and avoids a single point of failure.

Option B is correct : M-LAG involves two independent switches , both of which must be managed (though automation tools like iMaster NCE-Fabric simplify this).

Option C is correct : M-LAG provides fault domain isolation . A failure on one device does not impact the control plane of the other, enhancing network resilience.

Option D is correct : In contrast, stacking uses a single control plane , so upgrades can be more complex and potentially disruptive, affecting the entire stack.

Huawei best practices favor M-LAG over stacking in modern data centers due to its distributed control, higher reliability, and better fault isolation .

Therefore, the correct answer is A .