For most UK businesses, Cisco suits larger, complex or heavily regulated networks that need deep feature sets; Aruba is the strongest value for enterprise Wi-Fi and campus access; and Fortinet is the natural choice when security and networking need to converge on one platform. The right answer depends on your site count, user density and budget — not the brand badge.
Cisco, Aruba and Fortinet: strengths and where each fits
A failed Wi-Fi roll-out usually isn't a hardware problem — it's a fit problem. The vendor was chosen before anyone measured the building, counted the devices or priced the licensing over five years. Each of the three leading vendors has a clear sweet spot, and knowing it saves you from over-buying.
Cisco is the deepest and most widely supported platform, with Catalyst switching, Meraki cloud-managed kit and a vast partner ecosystem. It fits larger organisations, multi-site estates and environments where advanced routing, segmentation and compliance evidence matter. The trade-off is cost and complexity — you pay for capability you may not fully use.
Aruba (HPE) is frequently the best value for enterprise wireless and campus switching. Its Wi-Fi 6/6E access points and Central cloud management perform strongly in dense environments — offices, schools, warehouses — often at a lower licensing burden than equivalent Cisco. Fortinet, by contrast, leads where security is the priority: its FortiGate firewalls, FortiSwitch and FortiAP tie into one 'Security Fabric', so firewall policy, switching and Wi-Fi are managed together. That convergence is genuinely useful for lean IT teams.
Switching, wireless and firewall: matching kit to your needs
The most useful way to assess a network is in three layers — the firewall at the edge, the switches that connect everything, and the wireless that covers the floor. You don't have to buy all three from one vendor, but there are real advantages to a consistent stack: single-pane management, predictable interoperability and one support contract.
For a single-site office of 20–80 staff, a Fortinet or Aruba stack usually delivers everything you need without Cisco-level cost. For multi-site estates with a central head office, Cisco or a Fortinet Security Fabric makes inter-site segmentation and policy far simpler. If Wi-Fi performance is your main pain point — dropped calls, dead spots, slow conference rooms — the access point count and placement matter far more than the badge.
Whichever direction you lean, the kit should be specified against a design, not a catalogue. That's the core of good Cisco network consultancy and its Aruba and Fortinet equivalents: deciding what you actually need before anyone raises a quote.
- Firewall/edge: Fortinet FortiGate for security-led sites; Cisco Meraki MX for simple cloud-managed estates
- Switching: Cisco Catalyst for high density and advanced routing; Aruba CX for strong value; FortiSwitch for Fabric integration
- Wireless: Aruba for best-value dense Wi-Fi; Cisco Meraki for ease of management; FortiAP where firewall and Wi-Fi share one console
What business network design and consultancy costs in London
Network consultancy in London is typically priced one of three ways: a day rate, a fixed scope fee, or bundled into a managed service. Independent consultant day rates commonly sit in the £650–£1,200 range depending on seniority and vendor specialism. A design-and-specification engagement for a single office — survey, topology, kit list and configuration plan — often lands around £1,500–£4,000.
Multi-site or more complex designs scale from there. A phased network consultancy project covering several sites, firewall redesign and a wireless refresh can run from £8,000 into the tens of thousands once hardware and installation are included. The hardware itself is a separate line — and often the larger one.
The honest framing is that consultancy is a small fraction of total project cost but determines whether the larger hardware spend is well-targeted. Paying for a proper design is almost always cheaper than paying twice for kit that doesn't fit.
Do I need a wireless site survey before buying?
If Wi-Fi coverage or capacity is part of the project, yes — a wireless site survey is the step most often skipped and most often regretted. Guessing access point placement from a floor plan ignores how walls, metal shelving, glass partitions and user density actually behave. The result is either dead spots or money wasted on access points you didn't need.
A predictive survey models coverage from your building plans before purchase; an on-site (APoS) survey measures real signal with test equipment in the actual space. For a straightforward office, a predictive survey may be enough; for warehouses, listed buildings, healthcare or anywhere with high device density, an on-site survey earns its fee. A wireless network survey and design typically costs a few hundred to a couple of thousand pounds depending on floor area.
The survey also future-proofs the design. Specifying for today's headcount leaves you short in two years — a good survey accounts for growth, Wi-Fi 6E and the steady rise in connected devices per person.
How licensing and support contracts affect total cost
The sticker price of a switch or access point is rarely the real cost. Cisco, Aruba and Fortinet all use subscription licensing for cloud management, security features and firmware updates — and those renewals, spread over five years, frequently exceed the original hardware spend.
Cisco Meraki and Catalyst licensing (DNA/Cisco Networking subscriptions) can be the highest ongoing cost of the three. Aruba Central licensing is often more economical for comparable wireless estates. Fortinet's FortiGuard bundles add security services to the firewall but need budgeting carefully — the entry price looks attractive until the UTM subscription is added.
When you compare quotes, insist on a five-year total cost that includes hardware, licensing, support/warranty and installation. A cheaper box with pricier licensing can cost more over the contract than a dearer box with lighter renewals. Factor in whether support is vendor-direct or delivered by your partner, because response times differ sharply.
- Hardware — one-off, but not the whole story
- Management licensing — annual or multi-year, often the biggest line over five years
- Security subscriptions — FortiGuard, Cisco Umbrella, Aruba ClearPass and similar
- Support and warranty — advance hardware replacement, firmware, TAC access
- Installation and configuration — one-off, plus any cabling work
Choosing a certified network partner in London
Vendor certifications matter because they govern access to support, pricing and firmware — but what matters more is whether the partner designs to your needs rather than their preferred reseller margin. A good partner will happily recommend Aruba over Cisco, or Fortinet over both, if that's the better fit.
Look for a partner that runs the network alongside the rest of your IT and security, not in isolation. A firewall tuned without reference to your endpoint security or identity controls leaves gaps; a Wi-Fi design that ignores your connectivity and leased line capacity will disappoint under load. At CLI Secure we deliver Cisco, Aruba, Fortinet and Grandstream design and support as one accountable service.
Before you commit, ask for a reference design, a five-year cost breakdown, and clarity on who holds the support contract. If you're weighing vendors now, a short scoping conversation is usually more valuable than another brochure — you can talk to our network team to pressure-test your requirements.