The aggregated physical links deliver higher bandwidth than each individual link. Traffic can be load-balanced across the physical links. If one of the physical links in the LAG goes down, traffic is dynamically and transparently reassigned to one of the other physical links. Increased reliability and availability.You can configure more than one LAG for a given switch. Management functions treat a LAG as if it were a single physical port. LAGs can be used to directly connect two switches when the traffic between them requires high bandwidth and reliability, or to provide a higher-bandwidth connection to a public network. All the physical links in a given LAG must operate in full-duplex mode at the same speed. Link aggregation allows the switch to treat multiple physical links between two end-points as a single logical link.
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