Hi friend!
M-LAG technology provides inter-device link aggregation. M-LAG allows two access switches in the same state to perform inter-device link aggregation negotiation with a user-side device or server, improving link reliability from the card level to the device level. In addition, M-LAG devices can be upgraded separately to ensure the stability of service traffic. Therefore, M-LAG is widely used on data center networks. You can refer to the link
https://info.support.huawei.com/info-finder/encyclopedia/en/M-LAG.htmlHope to help you!