SD-WAN

Choose by matching site scale, application paths, transport mix, routing, security, cloud connectivity, resilience, management skills, and migration requirements.

Map each site, circuit, application and dependency before comparing platforms or licence tiers, and confirm support for routing, segmentation, internet breakout, cloud on-ramp and policy-based path selection without reducing visibility. Use the platform comparison to assess routing, security, application steering, management, and site fit.

Cisco, Fortinet, Juniper, and HPE differ in routing architecture, integrated security, WAN optimisation, assurance, orchestration, hardware options, and existing-estate alignment.

Cisco focuses on centrally controlled routing and segmentation, Fortinet on converged security and SD-WAN, Juniper on session-aware policy with Mist insight, and HPE Aruba on orchestration, path conditioning and WAN optimisation. Use the vendor comparison to compare SD-WAN platforms by architecture, security, assurance, and branch requirements.

It measures path quality, steers applications by policy, uses multiple transports, centralises changes, and provides clearer visibility into site and application health.

Application-aware routing can move traffic away from links breaching latency, loss or jitter thresholds, while central templates make branch changes more consistent and repeatable. When thresholds are tuned correctly, teams reduce manual intervention and gain clearer evidence of whether issues sit with circuits, the local network or the application.

Consider SD-WAN when cloud traffic, circuit cost, provisioning time, resilience, application visibility, or policy consistency can no longer be addressed efficiently by the existing WAN.

Replacement is often justified where traffic still backhauls unnecessarily, new sites take too long to bring online, or application policy cannot be applied consistently across locations. A phased migration can retain private circuits at critical sites while validating internet performance, resilience and operational processes before wider change.

Yes, coexistence is practical when routing domains, segmentation, addressing, security, monitoring, circuit ownership, and cutover responsibilities are designed in advance.

Legacy and new WAN platforms can coexist if route exchange, policy boundaries, testing, rollback and monitoring are defined clearly for each migration wave. For WAN assessment, SD-WAN migration, or multi-vendor integration, speak to our SD-WAN experts before finalising the design.

Specify encrypted throughput, sessions, tunnels or peers, routing scale, application SLAs, segmentation, high availability, circuit diversity, cloud edges, and growth.

Base sizing on production encryption, inspection and service use rather than simple forwarding figures, and model sessions, prefixes, segments and cloud connections at current and planned scale. Resilience should cover device, power, LAN and carrier failure, with clear failover behaviour, management access and suitable hardware for each site.