Walk into almost any modern store and you are standing inside a small, busy data centre. The tills are now cloud point-of-sale terminals. The shelves carry electronic labels that update prices in real time. Cameras watch for shrinkage, sensors count footfall, digital signage refreshes by the hour, and somewhere in the stockroom a handheld scanner is talking to a warehouse three counties away. Add guest Wi-Fi, click-and-collect lockers and a payment network that absolutely cannot go down at five o’clock on a Saturday, and the humble branch network is carrying far more weight than it was designed for.
The trouble is that many retailers are still running these intelligent stores on infrastructure built for a simpler era: a broadband line, a basic router, an unmanaged switch and a couple of access points bolted on as an afterthought. It works, until it doesn’t. And in retail, “doesn’t” has a price measured in lost baskets, idle staff and damaged brand trust.
This is exactly the problem that SD-Branch was built to solve, and why a growing number of retail IT leaders, directors and network engineers are rethinking the branch from the ground up.
Why the retail branch outgrew its old network
The number of connected devices in a typical store has multiplied, and each one needs power, connectivity, segmentation and protection. In a single site you might now be running:
- Cloud-based PoS tills and self-checkout units
- Chip-and-PIN and contactless payment terminals
- Electronic shelf labels and in-aisle digital signage
- Loss-prevention cameras and IoT sensors for footfall, stock and temperature
- Staff handhelds, tablets and VoIP handsets
- Guest Wi-Fi for customers — increasingly a marketing and analytics asset in its own right
- Click-and-collect lockers and back-of-house warehouse links
Each of these competes for the same connection, and several of them are business-critical. Meanwhile, the operational challenge has shifted from running one store to running the entire estate. Pushing a configuration change to five stores is a task; pushing it to five hundred, consistently and securely, is a programme of work in its own right. Add the pressure of PCI-DSS compliance, the need to keep payment traffic ring-fenced from guest browsing, and the simple expectation that everything stays up during peak trading, and the cracks in the old model start to show. When a network falls over on Black Friday, the cost is not theoretical: it is measured in baskets abandoned at the till and queues walking out of the door.
So what is SD-Branch, and why does retail need it?
SD-Branch is the convergence of everything that used to be managed separately at a site — wide-area connectivity, LAN switching, Wi-Fi and security — into a single, software-defined stack that is provisioned and managed centrally. Instead of three or four boxes from three or four vendors, each with its own console, you get one integrated architecture and one pane of glass.
For retail, the appeal is overwhelmingly operational. A new store can be provisioned before an engineer even arrives on site, thanks to zero-touch deployment. Security policies are identical in every location, so a change made once is enforced everywhere. And the whole estate can be seen, steered and troubleshot from a single dashboard, rather than logging into individual sites one at a time. SD-Branch turns hundreds of independent stores into one coherent, manageable network.
Why Arista VeloCloud sits at the heart of retail SD-Branch
When retailers evaluate SD-WAN providers and weigh up competing SD-WAN solutions, they are increasingly landing on the Arista VeloCloud platform. The reason is pedigree meeting reach.
VeloCloud, founded in 2012 and acquired by VMware in 2017, spent the better part of a decade as one of the recognised SD-WAN leaders, with a cloud-delivered platform deployed across thousands of distributed enterprises worldwide. In 2025, Arista Networks completed its acquisition of the VeloCloud portfolio from Broadcom, uniting a battle-tested SD-WAN platform with Arista’s strength in campus switching and Wi-Fi. For retailers, that union is genuinely significant: a single vendor ecosystem can now deliver all three layers of the in-store stack, designed to work together rather than stitched together.
The connectivity layer — SD-WAN
The Arista VeloCloud SD-WAN edge sits at the front of each store and intelligently steers traffic across whatever links are available — fibre, broadband or 5G — on an application-by-application basis. Payment and PoS traffic is prioritised; guest Wi-Fi is kept firmly in its own lane. If a link degrades or drops, sessions fail over automatically, often before anyone in the store notices. Arista is also bringing AI to the WAN through its VeloRAIN capabilities, using machine learning for smarter traffic steering and anomaly detection — exactly the kind of self-optimising intelligence a busy retail estate benefits from.
The power layer — PoE switches
Beneath the SD-WAN edge, Power over Ethernet (PoE) switches do the quiet, essential work. A single cable delivers both data and electrical power to access points, cameras, VoIP handsets, self-checkout units and IoT sensors. The result is fewer power supplies cluttering the comms cabinet, tidier cabling, and the ability to remotely power-cycle a misbehaving device without sending anyone to site. For an estate of hundreds of stores, that operational simplicity adds up quickly.
The experience layer — Wi-Fi access points
Modern Wi-Fi 6, 6E and 7 access points are built for the dense, demanding reality of a shop floor: staff devices, a wave of IoT, and customer guest access that doubles as a source of valuable behavioural insight. With Arista’s cognitive Wi-Fi, performance is monitored and tuned automatically, so coverage and capacity keep pace with footfall rather than buckling under it.
All three layers are managed through Arista VeloCloud Orchestrator, giving you a unified view of LAN and WAN from one place — the single pane of glass that makes an SD-Branch estate genuinely manageable at scale.
Co-managed, not handed over: the SD-WAN managed services difference
There is a reason forward-thinking retailers look for SD-WAN managed services rather than fully outsourced ones. Internal IT teams know their business intimately; the last thing they want is to be locked out of their own network by a restrictive contract.
A co-managed model strikes the balance. Digital Carbon works as an extension of your team rather than a replacement for it. You keep full visibility, policy access and day-to-day control; we bring the specialist Arista VeloCloud expertise, round-the-clock support, and AIOps-driven proactive monitoring that catches issues before a store manager ever reaches for the phone. From SD-WAN and SASE to local networking and Wi-Fi, your estate is supported by people who can dive into the technical detail when it matters — and step back when it doesn’t. It is your network, on your terms.
The piece most SD-WAN providers forget: boots on the ground
Here is the uncomfortable truth about deploying SD-Branch across a national estate: you cannot install physical infrastructure from a network operations centre. Cables still have to be pulled, switches racked, and access points mounted in precisely the right spot. Surveys still have to be carried out so the design matches the building, not the floor plan. The cleverest SD-WAN solutions in the world still depend on someone doing skilled work on site.
This is where Digital Carbon’s partnership with Starlink Solutions becomes a real differentiator. Starlink Solutions provides the field engineering muscle behind every rollout — installing all physical cabling and access points at each retail location, carrying out site surveys, and making sure the on-site foundation is solid before the network is brought to life. With skilled engineers covering locations across the country, a national rollout that might otherwise drag on for months can be delivered store by store with consistency and pace, and to a single standard.
5G Fixed Wireless Access: the retail opener’s secret weapon
Opening a new store, refitting an existing one or trialling a pop-up? Waiting weeks for a fixed line to be provisioned can hold up your launch date — and your revenue with it.
As part of the same partnership, Starlink Solutions also delivers 5G broadband Fixed Wireless Access, giving a new or temporary site high-speed connectivity from day one. It can serve as primary connectivity where fibre simply isn’t available yet, or as a diverse failover path that keeps the tills running if the main line drops. Paired with Digital Carbon’s 4G/5G Fixed Wireless Access and the Arista VeloCloud edge’s automatic link steering, 5G stops being a backup afterthought and becomes a strategic part of your resilience — and a genuine accelerator for store openings.
A retail estate ready for whatever comes next
The retail network is no longer plumbing. It is the platform your store experience, your customer data and your omnichannel ambitions all run on. An SD-Branch architecture built on Arista VeloCloud, co-managed by a partner who understands retail, and deployed by field engineers who get it right the first time, gives you something more valuable than uptime: it gives you a network that can flex with the business. New stores open faster. Security and PCI segmentation are baked in rather than bolted on. And as AI-driven retail, richer in-store technology and ever-higher customer expectations keep arriving, your estate is ready to absorb them rather than be overwhelmed by them.
For IT leaders under pressure to modernise legacy infrastructure without losing control, that combination — proven technology, co-managed services and on-the-ground delivery — is what turns a network from a constant worry into a competitive advantage.
Ready to see what SD-Branch could do for your stores?
Whether you are modernising a legacy estate, planning a national rollout, or simply tired of firefighting in-store network issues, the best place to start is a conversation. Digital Carbon runs a free, no-obligation workshop where we get to know your environment, your goals and your challenges, then map out the right approach for your business — no jargon, no hard sell.
Book your free workshop today and discover how a co-managed Arista VeloCloud SD-Branch solution could transform every store in your estate.