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. Similar to a lab environment the OpenFlow controller manages all the switching and routing for the switch. When Aggregation is. This chapter covers the design recommendations for a data center design deployment consisting of a Cisco Nexus® 7000 Series Switch at the aggregation layer and a Cisco Nexus 5000 Series Switch at the access layer. This document describes the configuration of Ethernet services, including configuring link aggregation. 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. VLAN aggregation, also called super-VLAN, partitions a broadcast domain on a physical network into multiple VLANs (sub-VLANs) and aggregates them into a single logical VLAN (super-VLAN). The sub-VLANs are addressed from the same IP subnet and share a default gateway address, thereby reducing the. Unmanaged switches may be susceptible to loops (no Spanning Tree support), have no broadcast control (no VLAN support), and lack support for features such as Quality of Service (QoS) and Link Aggregation or Trunking.