Core switches form the high-speed backbone that links access layers, buildings, floors, sites, routing domains, and major network services across your network.
The platform you choose determines how resilient your backbone is, how well it handles inter-VLAN traffic and failover, and whether maintenance work affects a single path or an entire site.
As a partner to vendors including Cisco, HPE, Juniper, and Arista, we specify core switching against your requirements, so you're not overinvesting in modular capacity you won't use or constrained on uplink bandwidth and routing performance your network needs to scale.
Modern core switching is built to handle the demands placed on today's network backbones, from bandwidth and resilience to AI and cloud workloads.
High-speed backbones need telemetry and assurance from Catalyst Center, Aruba Central, Mist AI, and CloudVision to keep congestion visible.
Growth planning combines port, bandwidth, policy, and topology visibility so the core expands before new services overload it.
Redundant design, automated health checks, and change validation help keep the core stable during faults, upgrades, and configuration changes.
Policy and fabric automation reduce unnecessary complexity between access, distribution, wireless, and data-centre connections.
Application-aware telemetry helps core networks support cloud access, AI data movement, collaboration, and storage traffic without hidden chokepoints.
CloudVision, Catalyst Center, Aruba Central, and Mist Cloud help standardise configuration and visibility as connectivity scales across locations.
Core switching supports different environments, each with distinct throughput, resilience, segmentation, and operational continuity requirements.
High-capacity switching that aggregates buildings, routes between VLANs, and maintains resilient backbone connectivity with minimal downtime.
Resilient core connectivity for clinical systems, imaging, wireless, and admin traffic where internal performance directly supports patient-facing operations.
Low-latency, redundant switching between offices, trading environments, and application zones with strong segmentation and tightly controlled change windows.
Core switching that separates guest, CCTV, back-office, and conference traffic while delivering predictable performance across busy sites.
Reliable backbone switching for production, office, camera, and wireless networks where segmentation and uptime protect operational continuity.
Scalable core connectivity for teaching spaces, student access, staff systems, and wireless with strong segmentation and resilience.
Getting these areas right will help your business avoid costly rework and gaps in coverage, performance, security or lifecycle support.
Design resilient 10GbE Ethernet Switches around redundant paths, fast failover and maintenance windows before changing the network core.
Size 10GbE Ethernet Switches, uplinks and aggregation capacity so access, wireless and server traffic does not bottleneck at the core.
Decide how Network Management & Automation will handle templates, firmware, change control and consistency across critical switches.
Use Observability & Monitoring to track link health, congestion, errors and failover behaviour before users are affected.
Confirm Zero Trust & Secure Access requirements for routing boundaries, VLANs and policy enforcement across the core.
Factor Vendor Support & Lifecycle Services into warranty terms, firmware support windows, spares availability and roadmap fit before committing.
Each switching layer does a different job. Knowing where core switching starts and access or data centre switching stops helps you specify the right platform and avoid paying for capabilities your team does not need in the wrong place.
| Core Switching | Access Switching | Data Centre Switching | |
|---|---|---|---|
| What connects to it | Aggregates access switches and routes traffic across buildings, sites or major network zones | End-user devices, access points, cameras, phones, printers and edge equipment at the point users connect | Connects servers, storage, virtualisation hosts and application platforms inside the data centre |
| Where your team notices it | Overall site resilience, routing stability, capacity between network areas and consistent policy movement | User experience, device onboarding, Power over Ethernet budgets, segmentation and local policy enforcement | Application performance, east-west traffic, storage access, virtualisation scale and workload mobility |
| Typical decision trigger | Campus growth, higher inter-VLAN traffic, resilience gaps, routing redesign or scaling beyond access-layer capacity | More users, new wireless, higher Power over Ethernet demand, tighter segmentation or better visibility at the edge | Server growth, virtualisation, storage traffic, application latency, AI workloads or a move to leaf-spine design |
| Who usually manages it | Senior network teams responsible for routing, resilience, change control and site-wide policy consistency | Network teams supporting users, branches, campuses and distributed locations that need clear remote visibility | Data centre, network and platform teams coordinating application uptime, security zones and infrastructure scale |
| What it is not built for | Directly connecting every endpoint or replacing specialised data centre switching | Acting as the main routing core or carrying large data centre workloads | General user access at the campus edge or simple branch connectivity |
| Explore Access Switching | Explore Data Centre Switching |
Arista, Juniper, HPE Aruba, and Cisco platforms each suit different core networks, operating models, and performance requirements. Here's where each one fits best.
Best for: Teams wanting data-centre-grade throughput in the campus core, with one operating model aligned to existing Arista standards and operational practices.
Strengths
Best for: Teams wanting a scriptable, automation-friendly core with AI-assisted operations that reduce manual checks and improve visibility across distributed backbone environments.
Strengths
Best for: Teams wanting a modular, high-availability core with one operating system from access upward and simpler long-term scaling decisions.
Strengths
Best for: Campus backbones needing high-density, resilient aggregation with identity-based policy carried consistently from the access layer into the core.
Strengths
Unsure which platform is the right fit? Our specialists can assess crucial factors such as workloads, compatibility, operational priorities and future growth to recommend the most suitable approach.
We’re trusted by IT teams in enterprise environments, data centres and complex service provider networks. Our role is to help you make the right infrastructure decisions, with practical support across Cisco, HPE Aruba, Juniper and Arista.
Core Switching Services
From architecture and deployment to optimisation and modernisation, we help you build resilient, high-capacity core networks that support critical traffic and future growth.
Design resilient core switching infrastructure with the right throughput, redundancy, routing, uplink capacity and future growth in mind.
Learn more about Architecture & Design →Replace legacy switches, migrate configurations and deploy new core switching platforms with minimal disruption and seamless integration into your network.
Learn more about Migration & Deployment →Assess switch performance, resilience, firmware, routing and core network health to improve reliability, performance and operational efficiency.
Learn more about Assessment & Optimisation →Plan technology refreshes, replace end-of-life hardware and modernise core switching infrastructure with a structured roadmap for future growth.
Learn more about Lifecycle & Modernisation →We help you compare suitable core switching platforms across Cisco, HPE Aruba, Juniper and Arista — balancing performance, licensing, availability, lifecycle status and total cost.
Match throughput, uplinks, routing and performance to your requirements.
Get the right licensing and support for your environment.
Access competitive pricing and improved lead times.
Maximise value from existing equipment and refresh with ease.
Need help with core switching?
Speak to our experts about design, deployment, optimisation or modernisation of your core network.
Core Switching underpins campus and data centre connectivity, carrying traffic between access layers, sites, and critical services.
The solutions below help align core switching with resilient networking, scalable infrastructure, and stronger operational visibility.
Wired and wireless campus networks that connect users, buildings, and services with reliable site-wide performance.
Explore Campus Networking ›High-speed switching and fabric designs that support servers, storage, virtualisation, and demanding data centre workloads.
Explore Data Centre Networking ›Integrated switching, routing, wireless, and network services that keep sites, users, and applications securely connected.
Explore Networking ›Browse the full range available from each manufacturer we partner with.
Cisco Networking unifies switching, wireless, routing and security for resilient estates with simpler lifecycle planning.
View Cisco Networking ›
HPE Aruba Networking simplifies wired, wireless and WAN management with AI insights and consistent security.
View HPE Aruba Networking ›
Juniper Networking combines Junos consistency with Mist AI to automate operations and resolve issues faster.
View Juniper Networking ›If you're specifying core switching, these categories cover the access, data-centre and cloud-managed switching layers that connect into the network backbone.
Switching platforms for connecting users, servers, wireless, and services across access, core, and data centre layers.
Browse modelsCentrally managed switching and wireless with visibility and control across every site from a single console.
Browse modelsSpine-leaf and high-density fabric switching for server-to-server traffic, storage, and virtualised workloads at scale.
Browse modelsEdge switching for connecting users, phones, access points, cameras, and devices across office or campus networks.
Browse modelsChoose core switching by matching backbone traffic capacity, redundancy design, response-time tolerance, routing scale, segmentation needs, and operational management model at scale.
Core selection should be based on aggregate traffic from connected switches, resilience design, sustained performance under load, and headroom for growth, because any shortfall at the core affects the whole network. Use the platform comparison above to check which option aligns best with your estate, management model, and refresh plans.
Core switch vendors differ in throughput, resiliency architecture, fabric design, routing scale, automation, telemetry, and integration with wider network tooling.
The main differences are how each platform handles sustained traffic, supports resilience, and fits your existing management and automation estate, as basic switching capability is broadly comparable at this tier. Use the platform comparison above to compare the main options against management model, security requirements, and site profile.
Core switch choice affects network-wide performance, convergence time, segmentation, east-west traffic flow, resilience, and troubleshooting across dependent access layers at scale.
The core governs overall network performance because most inter-VLAN and inter-site traffic passes through it, so any bottleneck here limits the value of investment elsewhere. Latency or jitter introduced at the core also affects real-time applications and makes changes across the wider estate harder to plan and support.
Replace core switches when support status, traffic handling capacity, resilience, routing scale, telemetry, or segmentation capability no longer meets network requirements.
Replacement is usually justified when the platform is nearing end of support, aggregate traffic is approaching capacity, or resilience and feature depth no longer match operational risk. Making the right call helps avoid unnecessary spend while improving visibility, manageability, and support confidence across busy sites.
Yes, mixed-vendor core switching can be supported during migration when routing design, redundancy, interconnects, maintenance windows, and rollback paths are planned.
Core migrations need careful staging because configuration does not translate directly between vendors and the business impact of failure is high, so testing, phased cutover, and preserved resilience are critical. Before changing the network core, speak to our networking experts to review resilience, migration risk, and operational impact.
Specify core switches around line-rate throughput, low latency, redundant supervisors or fabrics, routing scale, power resilience, and growth headroom at scale.
Throughput should be sized against combined peak traffic from connected switches with clear headroom for growth, while latency should be assessed under sustained load rather than ideal benchmarks. This gives the team a clearer specification, reduces bottlenecks, and makes day-to-day network changes easier to plan and support.
