Key requirements include: high backplane bandwidth (supporting wire-speed forwarding across all downlink ports), 10G uplink ports (connecting to the core layer), Link Aggregation (LACP) support, advanced routing capabilities (OSPF/BGP), and high-reliability design (dual power. Key requirements include: high backplane bandwidth (supporting wire-speed forwarding across all downlink ports), 10G uplink ports (connecting to the core layer), Link Aggregation (LACP) support, advanced routing capabilities (OSPF/BGP), and high-reliability design (dual power. In fiber optic environments, access layer switches need to meet the following core requirements: adequate port density (typically 24-48 ports), PoE power delivery capability (for PoE switches), fiber uplink ports (1G or 10G), VLAN segmentation support, and basic QoS. For Fiber-to-the-Desktop (FTTD). 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. It is essential for larger networks requiring efficient data flow. You may also. Consistent with FAR 12. 212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U. Government under vendor's standard commercial license. Links to third-party websites take you outside the Hewlett Packard Enterprise. The aggregation (sometimes also called distribution) layer is a real crossroad. It facilitates the connectivity because it would rapidly become impractical to. 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.