![]() ![]() Network architects can implement aggregation at any of the lowest three layers of the OSI model. Combining multiple physical connections into one logical connection using link aggregation provides more resilient communications. Multiple logical connections can be made, but many of the higher level protocols were not designed to fail over completely seamlessly. There are three single points of failure inherent to a typical port-cable-port connection, in either a computer-to-switch or a switch-to-switch configuration: the cable itself or either of the ports the cable is plugged into can fail. Most of these early solutions required manual configuration and identical equipment on both sides of the connection. An alternative solution, introduced by many of the network manufacturers in the early 1990s, is to use link aggregation to combine two physical Ethernet links into one logical link. If one started to bump into bandwidth ceilings, then the only option was to move to the next generation, which could be cost prohibitive. Ethernet bandwidths historically have increased tenfold each generation: 10 megabit/s, 100 Mbit/s, 1000 Mbit/s, 10,000 Mbit/s. Link aggregation increases the bandwidth and resilience of Ethernet connections.Ä«andwidth requirements do not scale linearly. 3.2.1 Advantages over static configuration.
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June 2023
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