How Meraki SD-WAN Improves Multi-Site Connectivity

For UK businesses operating across multiple locations — whether that means two offices in the same city or a dozen branches nationwide — network connectivity between sites is a fundamental operational requirement. Staff need seamless access to shared applications, files, and communication systems regardless of which office they are working from. The network needs to be reliable, secure, fast, and manageable. And increasingly, it needs to support cloud-first architectures where applications and data live in platforms like Microsoft Azure and Microsoft 365 rather than in a central data centre.

Traditional approaches to multi-site networking — MPLS circuits and hub-and-spoke VPN topologies — were designed for a different era. They are expensive, inflexible, slow to provision, and poorly suited to the cloud-centric reality of modern business. Software-Defined Wide Area Networking (SD-WAN) represents a fundamental shift in how multi-site networks are designed, deployed, and managed. And among SD-WAN solutions, Cisco Meraki has established itself as the leading platform for UK SMEs, combining enterprise-grade capabilities with the simplicity and cloud management that smaller organisations need.

This guide explains what SD-WAN is, how Cisco Meraki's SD-WAN solution works, and why it is transforming multi-site connectivity for businesses across the United Kingdom.

What Is SD-WAN?

SD-WAN stands for Software-Defined Wide Area Network. In simple terms, it is a technology that uses software to intelligently manage network traffic across multiple internet connections and sites, replacing or supplementing traditional dedicated circuits like MPLS.

A traditional WAN connects offices using dedicated leased lines or MPLS circuits provided by a telecommunications carrier. These circuits are reliable but expensive, inflexible, and slow to provision — ordering a new MPLS circuit in the UK typically takes 60 to 90 days. SD-WAN, by contrast, can use standard broadband connections, leased lines, 4G/5G, or any combination thereof. The SD-WAN appliance at each site intelligently routes traffic across the available connections based on application requirements, link performance, and defined policies.

Why Cisco Meraki for SD-WAN?

The SD-WAN market includes numerous vendors — Cisco Viptela, Fortinet, VMware VeloCloud, Silver Peak, and others. Cisco Meraki occupies a distinctive position in this market as the solution best suited to small and medium-sized businesses. Several factors make Meraki particularly attractive for UK SMEs.

Cloud-First Management

Every Meraki device is managed through a single cloud dashboard. There are no on-premise controllers, no management servers, and no complex software to install. Your IT team — or your managed IT provider — can monitor and configure every site from a web browser, anywhere in the world. This cloud-first approach dramatically reduces the complexity and cost of managing a multi-site network.

Zero-Touch Provisioning

When deploying a new Meraki SD-WAN appliance at a branch office, the device can be pre-configured in the cloud dashboard before it even arrives at the site. Once it is plugged in and connected to the internet, it automatically downloads its configuration from the Meraki cloud and joins the network. A non-technical office manager can perform the physical installation — simply connect power and an ethernet cable. This zero-touch provisioning model means new sites can be brought online in minutes rather than the days or weeks required for traditional network equipment.

Integrated Security

Meraki MX appliances — the devices that provide SD-WAN functionality — also include a full suite of security features: stateful firewall, intrusion detection and prevention, content filtering, malware protection, and VPN connectivity. This means you do not need separate security appliances at each site, reducing both cost and complexity.

How Meraki SD-WAN Works in Practice

To illustrate the practical benefits, consider a UK professional services firm with a headquarters in London and branch offices in Birmingham, Manchester, and Edinburgh. Under a traditional MPLS arrangement, the firm would need four expensive leased circuits, with all traffic routing through the London headquarters.

With Meraki SD-WAN, each office has two standard business broadband connections — perhaps one fibre leased line and one FTTP broadband connection. The Meraki MX appliance at each site creates encrypted VPN tunnels to every other site automatically, forming a full mesh network. Traffic is routed intelligently based on application type and link performance.

Application-Aware Routing

Meraki SD-WAN understands application types and routes traffic accordingly. Microsoft Teams video calls, which are sensitive to latency and jitter, are automatically routed over the best-performing link. Bulk file transfers, which are less sensitive to latency, can use the secondary connection. If the primary link at any site degrades or fails, traffic is automatically rerouted to the secondary link within seconds — often without users even noticing.

Direct Cloud Access

One of the most significant advantages of SD-WAN over traditional MPLS is direct cloud access. In an MPLS network, traffic from branch offices to cloud services like Microsoft 365 must typically route through the headquarters first, adding latency and consuming expensive MPLS bandwidth. With Meraki SD-WAN, each site can access cloud services directly over its local internet connection, providing faster performance and reducing the load on inter-site links.

The Cost Case for Meraki SD-WAN

The financial case for SD-WAN is compelling. Consider the four-site professional services firm described above.

Cost Element	Traditional MPLS (Annual)	Meraki SD-WAN (Annual)
Circuit costs (4 sites)	£36,000	£9,600 (dual broadband per site)
Hardware/appliances	£8,000 (routers, firewalls)	£6,000 (Meraki MX appliances)
Management and licensing	£4,000	£4,800 (Meraki licence)
Security (separate appliances)	£5,000	£0 (included in MX)
Total annual cost	£53,000	£20,400

The SD-WAN approach delivers a 61% cost reduction whilst providing superior performance, better resilience through dual-ISP failover, and integrated security at every site. The savings are even more dramatic for businesses with more locations.

Security Considerations

Security is a common concern when moving from dedicated MPLS circuits to internet-based SD-WAN. However, Meraki SD-WAN addresses these concerns comprehensively. All site-to-site traffic is encrypted using AES-256 encryption, the same standard used by government and military communications. The Meraki MX includes a next-generation firewall, intrusion detection and prevention, and advanced malware protection at every site. Content filtering can block access to malicious or inappropriate websites. And the cloud management platform provides complete visibility into network activity, security events, and threat intelligence across all locations.

For UK businesses subject to Cyber Essentials requirements, the Meraki platform makes demonstrating compliance straightforward, with built-in firewall rules, network segmentation capabilities, and comprehensive audit logging.

How Cloudswitched Deploys Meraki SD-WAN

At Cloudswitched, we are a Cisco Meraki partner with extensive experience deploying SD-WAN solutions for multi-site UK businesses. Our approach includes a thorough assessment of your current network architecture and connectivity, design of an SD-WAN solution tailored to your specific requirements, procurement and pre-configuration of Meraki hardware, coordinated deployment across all sites with minimal disruption, ongoing monitoring and management through our Network Operations Centre, and regular performance reviews and optimisation.

We handle everything from initial circuit procurement through to day-to-day management, ensuring your multi-site network is fast, reliable, secure, and cost-effective.