Dual-network aggregation switch

Dual-network aggregation switches can be configured using LACP or MLAG to combine multiple ports for higher bandwidth, redundancy, and load balancing.Understanding Link AggregationLink aggregation combines two or more physical ports into a single logical link, increasing throughput and providing redundancy. Two common approaches are:LACP (Link Aggregation Control Protocol): Standardized protocol (IEEE 802.3ad) that dynamically manages aggregated links between switches or devices .MLAG (Multi-Chassis Link Aggregation): Aggregates ports across two switches to appear as a single logical switch to connected devices, enabling active-active Layer 2 redundancy .Step-by-Step Configuration1. Plan Your PortsIdentify the ports on both switches to be aggregated. Use sequential ports if required by your switch model .Ensure all ports in the aggregation group have the same speed and duplex settings and use compatible SFP modules or DAC cables .2. Physical ConnectionsConnect the selected ports between the two switches.For MLAG, designate one switch as Top and the other as Bottom to maintain consistent configuration .If possible, run cables over different physical paths to reduce the risk of simultaneous link failure .3. Configure the AggregationUniFi Switches (LACP):Log in to the UniFi Controller.Select the switch and navigate to Ports → Port Management.Select the ports to aggregate, choose Aggregate, and assign them to a Link Aggregation Group (LAG) .Apply changes and repeat on the connected switch.Arista Switches (MLAG):Enable MLAG on both switches and configure a peer link between them.Assign the selected ports to the MLAG port channel.Ensure STP (Spanning Tree Protocol) is properly configured to prevent loops .4. Verify ConfigurationCheck that the aggregated ports are active and traffic is being load-balanced.Use switch port statistics to confirm that both links are carrying traffic .Test failover by disconnecting one link and ensuring traffic continues on the remaining link.Best PracticesUse identical switch models and firmware for MLAG to avoid compatibility issues .Prefer high-quality Ethernet cables (CAT6 or better) or compatible fiber modules to prevent bottlenecks .Monitor traffic and adjust LAG settings if needed to optimize load balancing.Document the aggregation setup for future maintenance and troubleshooting. By following these steps, you can configure a dual-network aggregation switch setup that maximizes bandwidth, provides redundancy, and ensures seamless failover between switches .

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OverviewUsageMotivationArchitectureIEEE link aggregationProprietary link aggregationSupportLinux drivers

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Dual-network aggregation switch