Backhaul method, unit, data allocation method and controller, network system, and medium

An information backhaul method, applied to a networking unit in a network system, wherein the network system comprises a plurality of stages of networking units that are cascaded, each of the plurality of stages of networking units comprises a plurality of optical ports, and the information backhaul method comprises:

• acquiring cascade information of a networking unit in a current stage, wherein the cascade information of the networking unit in the current stage comprises optical port information and identification information of the networking unit in the current stage;
• and
• feeding back the cascade information of the networking unit in the current stage to cause a backhaul information processing device to perform;
• determining an actual networking topology according to optical port information of the each of the plurality of stages of networking units;
• comparing the actual networking topology with a preset networking topology to determine whether the actual networking topology is the same as the preset networking topology;
• and
• in response to a determination result that the actual networking topology is different from the preset networking topology, determining a data allocation link according to the actual networking topology, and allocating data according to the data allocation link determined according to the actual networking topology.