Traditional data center networks (DCNs) often suffer from single points of failure, limited scalability,
and traffic bottlenecks. Both M-LAG and stacking address these issues, but their suitability for 24/7
service continuity differs.
M-LAG Benefits: M-LAG (Multi-Chassis Link Aggregation) on Huawei CE switches allows two devices
to act as a single logical switch, providing active-active forwarding, high availability, and rapid
failover (e.g., via peer-link synchronization). It supports non-stop service during device failures,
making it ideal for 24/7 continuity.
Stacking Benefits: Stacking combines multiple switches into a single logical unit, sharing a control
plane. While it improves scalability and simplifies management, a stack master failure can disrupt
the entire stack unless redundancy is perfectly configured, potentially affecting service continuity.
Comparison: M-LAG’s decentralized design and real-time synchronization offer better fault isolation
and recovery compared to stacking, where a master switch failure impacts the stack. Huawei
documentation highlights M-LAG’s superiority for high-availability scenarios like 24/7 operations.
The statement is TRUE (A) because M-LAG is indeed a better choice than stacking for ensuring 24/7
service continuity due to its robust failover and redundancy features.
Reference: Huawei CloudEngine Series Switch Configuration Guide – M-LAG vs. Stacking; HCIP-Data
Center Network Training – High Availability Solutions.
