Building a Flexible, Multi‑Gigabit Campus Core for the Wi‑Fi 6 Era

A convergence of emerging technologies is tightening the campus core, the backbone of every enterprise network. The surge of high‑throughput Wi‑Fi 6 access points (APs), the explosion of IoT endpoints, the rapid shift to cloud‑centric workloads, and the redesign of data centers away from bulky chassis all demand a more resilient, scalable core.

Wi‑Fi 6 (802.11ax)

Wi‑Fi 4 (802.11n) introduced in 2009 delivered up to 600 Mbps, comfortably handled by a single gigabit Ethernet port. Wi‑Fi 5 (802.11ac) Wave 2, launched in 2013, exceeded 1 Gbps, exposing a bottleneck at the switch side and sparking the adoption of 802.3bz multi‑gigabit ports (2.5/5/10 GbE). Wi‑Fi 6, now the dominant enterprise standard, can quadruple capacity compared to Wi‑Fi 5. Consequently, many organizations pre‑emptively install multi‑gigabit switches before rolling out Wi‑Fi 6 APs.

These higher edge speeds translate into a demand for 40 GbE and 100 GbE backbone links to keep pace with edge traffic.

IoT & LTE

The proliferation of connected devices—both wireless and wired—drives unprecedented traffic volumes and latency sensitivity. By 2021, data from IoT and high‑definition video streams is projected to reach 278,000 PB per month. In‑building LTE+5G via CBRS, which became available in 2019, further increases local backhaul load by providing private cellular networks where coverage is weak.

The Cloud & The Evolving Data Center

Mission‑critical workloads are increasingly hosted in the cloud, necessitating fast, reliable, low‑latency links between campus and remote data centers. While on‑prem data centers shrink, they still require 10 GbE or 25 GbE connectivity to servers and storage. The rising ubiquity of 100 GbE in hyperscale facilities is driving down transceiver costs, making high‑speed links more affordable for campus deployments.

The Chassis Is Out, Stackable Switches Are In

Traditional chassis‑based switches are costly, complex, and often over‑provisioned for leaner data centers. Modern stackable fixed‑form‑factor switches package comparable capabilities into a modular, pay‑as‑you‑grow architecture. Many models support linear stacking of up to 12 units, use standard Ethernet or fiber for interconnects, and allow remote stacking across floors or buildings.

Stackable designs also support in‑service software upgrades and high availability, enabling one‑by‑one upgrades without downtime.

Conclusion

To meet the dual pressures of Wi‑Fi 6, IoT, cloud migration, and lean data centers, campus cores must evolve into high‑performance, scalable, and easily managed networks. Multi‑gigabit switches, stackable architectures, and 40/100 GbE backbones provide the flexibility and resilience required for today’s and tomorrow’s campus environments.

Siva Valliappan is the Vice President of Wired Products at Ruckus. Prior to Brocade/Ruckus, Siva led product management at Cisco, focusing on software, cloud management, and network services for Cisco’s enterprise Ethernet switches. He was Cisco’s first product manager for IOS Security and a key architect behind its IOS Security suite. Siva holds a bachelor’s degree in computer engineering from Santa Clara University and is a Cisco Certified Internetwork Expert (#2929) in Routing and Switching.