In Aggregation mode, all VLANs in the switch are part of an OpenFlow instance. The exception is the management VLAN and a VLAN that communicates to the controller. 3ad) that dynamically manages link aggregation, provides automatic failover, and helps prevent misconfigurations by ensuring both ends of the link agree on the aggregation settings. In what order should I configure. An aggregation switch is a network device that consolidates traffic from multiple access switches, wireless access points, or other edge devices and forwards it to core switches or routers. By bundling multiple network connections into a single high-bandwidth link, aggregation switches help. Link aggregation (a. Link aggregation increases total bandwidth beyond what a single connection could sustain, and provides redundancy where all but one of the physical links.