Link aggregation is to combine two or more data channels into a single channel, the channel appears as a single logical link of higher bandwidth. Link Aggregation typically used to connect a large bandwidth requirements or more devices, such as a server connected to the backbone network or server farm.
advantage:
1. To improve the link availability
Link aggregation, each dynamic backup members. When a link is broken, the other members can quickly take over their work. The spanning tree protocol is different link aggregation is activated outside the polymerization of the backup process is not visible, and only enable the backup process, regardless of the other links, the handover can be completed in a few milliseconds in the aggregate link.
2. increase link capacity
Another significant advantage is the link aggregation technology provides a user economy improving uplink transmission rate method. By bundling a plurality of physical links, the user need to upgrade existing equipment can obtain more bandwidth data links , each of which capacity is equal to the sum of the physical link capacity. Aggregation module according to a certain algorithm traffic assigned to different members, to achieve load sharing link level.