Classification of Eth-Trunks on S series switches

Eth-Trunks can work in manual load balancing mode or LACP mode.
Eth-Trunk in manual load balancing mode:
The manual load balancing mode is a basic link aggregation mode. In this mode, you must manually create an Eth-Trunk, add member interfaces to the Eth-Trunk, and specify active member interfaces. This mode does not involve LACP. All active interfaces forward data and evenly share load. If an active link fails, the remaining active links automatically share the traffic evenly.
Eth-Trunk in LACP mode:
In LACP mode, you must manually create an Eth-Trunk and add member interfaces to the Eth-Trunk. Different from the Eth-Trunk in manual load balancing mode, active member interfaces in LACP mode are selected using LACP protocol packets. When a group of interfaces are added to an Eth-Trunk, the devices at both ends determine active interfaces and inactive interfaces through the LACP packets.
The LACP mode is also called M:N mode. This mode supports both load balancing and redundancy backup functions. In the link aggregation group, M links are active links responsible for data forwarding and load balancing, whereas N links are inactive links working as backup links and do not forward data. If an active link becomes faulty, the system selects the link with the highest priority from the N inactive links to replace the faulty link. The inactive link becomes active and starts to forward data.

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