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What is Link Aggression?
Link Aggregation combines multiple physical network links into one logical connection, increasing bandwidth and providing redundancy. By using IEEE 802.1ad (QinQ), Link Aggregation encapsulates multiple VLANs within another VLAN, enhancing scalability and performance. This standard improves traffic distribution, reliability, and load balancing across multiple links. Link Aggregation is commonly used in enterprise and data center networks to ensure high availability and prevent failure points.
Example Scenario: Link Aggregation in a SCADA System
In a SCADA system used at an industrial facility, there are multiple sensors and remote I/O devices connected to a central SCADA server. These devices are responsible for monitoring various aspects of the plant’s operations, such as temperature, pressure, flow rates, and more. The SCADA system requires constant data collection and real-time processing to ensure operations are running smoothly.
To improve network performance, Link Aggregation (LAG) is implemented between the SCADA server and the network switch. The SCADA server is equipped with two network ports that are configured for Link Aggregation, while the switch also has Link Aggregation enabled on the corresponding ports.