Applications & traffic
Application locations, traffic flows, SaaS and cloud use, performance sensitivity, business criticality, and growth assumptions.
IA-03 / WAN & SD-WAN Advisory
WAN and SD-WAN architecture built around applications and operations.
We help organizations define how locations, users, applications, cloud services, internet edges, and providers should connect. The result is a requirements-led WAN or SD-WAN direction with explicit tradeoffs and a migration path the operating team can own.
Engagement trigger
Contract renewal, cloud adoption, branch growth, reliability concerns, rising circuit cost, or an SD-WAN initiative requires an independent architecture decision.
Decision-ready output
WAN strategy · SD-WAN requirements · options analysis · target architecture · migration plan
Decisions this work supports
Resolve the architecture questions before they become implementation constraints.
- 01
Which connectivity model fits the applications and sites?
Map business criticality, traffic patterns, cloud and internet use, latency, availability, and site tiers to transport and topology choices.
- 02
Where should traffic policy and security be enforced?
Define path selection, local breakout, segmentation, inspection, cloud access, remote connectivity, and failure behavior together.
- 03
How can the organization migrate without creating fragility?
Plan coexistence, pilots, carrier and platform dependencies, rollback, validation, operations, and contract timing.
Architecture scope
Connected disciplines, one design context.
The exact boundary is agreed around the decision. Relevant dependencies remain visible even when they sit outside the hands-on scope.
Transport & providers
Circuit types, diversity, access methods, carrier dependencies, service boundaries, site tiers, cost, and contract constraints.
SD-WAN policy & security
Path policy, segmentation, internet breakout, inspection, cloud on-ramps, routing exchange, management, and administrative access.
Resilience & migration
Failure scenarios, convergence expectations, underlay and overlay dependencies, pilots, coexistence, rollback, testing, and handoff.
Engagement sequence
A controlled path from uncertainty to an owned design.
- 01
Baseline
Inventory sites, transports, providers, contracts, applications, traffic patterns, performance, incidents, and cost drivers.
WAN fact base - 02
Define
Establish business, application, security, availability, operations, lifecycle, and commercial requirements.
Requirements matrix - 03
Decide
Compare topology, transport, SD-WAN, security, cloud access, management, and sourcing options against the requirements.
Options and decision record - 04
Migrate
Develop site waves, carrier and platform prerequisites, pilot measures, validation, rollback, and operational transition.
Migration plan
- 01↗
Current-state WAN assessment
Site, circuit, provider, topology, routing, performance, resilience, security, and operational findings.
- 02↗
Business and technical requirements matrix
Traceable requirements for sites, applications, availability, security, operations, and commercial constraints.
- 03↗
WAN and SD-WAN options analysis
Alternatives evaluated against requirements, with tradeoffs, dependencies, risks, and total operating implications.
- 04↗
Target-state WAN architecture
Topology, site tiers, transports, routing, segmentation, path policy, edges, management, and resilience.
- 05↗
Migration and validation roadmap
Pilots, waves, prerequisites, coexistence, rollback, acceptance criteria, and ownership.
Engagement fit
A useful entry point when…
- WAN contracts or platforms are approaching renewal without a settled target architecture
- Cloud and SaaS adoption have changed traffic patterns and internet-edge requirements
- Branch reliability, application performance, carrier diversity, or cost is difficult to explain
- An SD-WAN decision needs requirements and tradeoffs before vendor selection or rollout
Questions before scoping
Practical answers, before the work begins.
Read the SD-WAN architecture decision guide01Do we need to have selected an SD-WAN platform before engaging?
No. Requirements and architecture should usually precede product selection. If a platform is already selected, the work can focus on design, policy, dependencies, migration, and validation within that constraint.
02Can you help compare SD-WAN vendors?
Yes, when evaluation is in scope. The comparison should use documented business, application, security, operational, integration, lifecycle, and commercial requirements rather than a generic feature checklist.
03Does WAN advisory include carriers and circuit contracts?
The architecture can define transport, diversity, performance, availability, and service requirements. Provider sourcing, pricing, and contract support can be included only when explicitly agreed.
04How are migration risks handled?
The roadmap can define pilots, site waves, coexistence, prerequisites, routing and security transitions, rollback, acceptance testing, monitoring, and operational handoff.
NEXT / 01Project briefObjective → Scope → Evidence
Start with the decision
Bring us the decision behind wan & sd-wan advisory.
A high-level description is enough to begin defining requirements, boundaries, dependencies, and the right architecture output.
Engagements can be delivered remotely, on site, or through a hybrid model. Location, scheduling, site access, and any travel requirements are agreed during scoping.