Running connectivity across multiple offices introduces complexity most single-location businesses never face. Here's how to design, price, and manage a multi-site network.
A single-location business needs reliable internet. A multi-location business needs reliable internet *and* a way to connect those locations to each other, to central resources, and to cloud services — consistently, securely, and manageably.
This is where networking complexity compounds. Each site has different carrier availability. Each site has different bandwidth needs. And the connections between them need to be fast enough and secure enough to run real applications, not just email.
Each location connects to the internet independently, and an encrypted VPN tunnel connects the sites to each other (and to a central data center or cloud hub).
Pros: Cheap. Leverages existing internet connections. Easy to set up with modern SD-WAN.
Cons: Performance depends on public internet routing. Latency spikes. Not suitable for latency-sensitive applications like VoIP or real-time data sync at scale. Best for: Small businesses, cost-sensitive deployments, cloud-first architectures (where most traffic goes to SaaS, not between sites).A private, carrier-managed network that connects your locations over a dedicated path — traffic never touches the public internet. MPLS is the traditional enterprise WAN standard.
Pros: Consistent, low-latency performance. Native QoS for voice and video. Carrier-managed.
Cons: Expensive ($500–$3,000+/site/month). Long provisioning times (60–90 days). Not optimized for cloud traffic — all traffic routes through your hub, then out to the internet. Best for: Large enterprises with high-value data, regulated industries, businesses with many legacy applications that require private connectivity.SD-WAN uses software to intelligently route traffic across multiple connections — fiber, cable, broadband, LTE — choosing the best path in real time. It provides MPLS-like performance at internet-like prices.
Pros: Cost-effective (30–50% cheaper than MPLS). Works with any underlying internet service. Excellent for cloud traffic. Centralized management of all sites from one dashboard.
Cons: More complex to design correctly. Requires capable internet at each site. Vendor ecosystem is fragmented. Best for: Most modern businesses with 3+ locations, especially those with heavy SaaS/cloud usage.SASE combines SD-WAN with cloud-based security (firewall, ZTNA, CASB) into a single platform. Traffic routes through the vendor's cloud, getting optimized routing *and* security inspection in one pass.
Pros: Eliminates separate security appliances at each site. Ideal for distributed or remote-heavy workforces.
Cons: Higher cost. Requires trust in vendor's cloud infrastructure. Best for: Larger enterprises with security-conscious IT teams and many remote or hybrid workers.Step 1: Inventory your sites. Document each location — number of users, applications used, current connectivity, and business criticality.
Step 2: Classify your traffic. Separate your traffic into categories: latency-sensitive (VoIP, video), cloud SaaS (Microsoft 365, Salesforce), private/on-premise application traffic, and internet browsing. Each category has different routing requirements.
Step 3: Establish connectivity requirements per site. A regional HQ with 100 users running real-time applications has different needs than a 5-person sales office. Don't over-engineer smaller sites.
Step 4: Choose your WAN architecture. For most businesses today, SD-WAN over business broadband or fiber is the right answer. MPLS is appropriate for specific high-sensitivity use cases.
Step 5: Design for redundancy. Every site should have at least two WAN connections from different providers or using different technologies (e.g., fiber primary + LTE failover). Failover should be automatic and sub-second.
Treating all sites the same. A 200-person headquarters needs different connectivity than a 3-person satellite office. Standardize where it makes sense, but right-size each site.
Single-carrier dependency. If all your locations are on one carrier, one carrier outage affects everything. Diversify carriers at your critical locations.
Ignoring last-mile availability. SD-WAN is only as good as the connections it runs over. Before designing your WAN, verify what fiber and business broadband options are actually available at each location — availability varies significantly by address.
Under-specifying bandwidth. Cloud applications consume more bandwidth than legacy client-server apps. If your bandwidth estimates are based on usage from 5 years ago, they're likely wrong.
Multi-location deals have significant pricing leverage that individual site purchases don't. Carriers and SD-WAN vendors want the whole portfolio. A telecom broker manages this aggregation — running a single RFP across all your sites simultaneously, which creates volume leverage and simplifies vendor management across a complex deployment.
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