Get Started
  • CASE STUDY · NETWORK TRANSFORMATION · MULTI-COUNTRY

SD-WAN Site Survey, Infrastructure Audit and Multi-Site Migration

NGMS delivered a two-phase SD-WAN programme across enterprise branch locations in several countries, combining verified infrastructure surveys with controlled SD-WAN migration and zero critical failures.
View Project Results
Request an SD-WAN Plan

0

Critical Migration Failures

A structured survey-first approach gave each migration verified topology data before production cutover.

No Disruption

Production services remained operational
Project phases
0
Critical migration failures
0
Production disruptions
0
Cutovers inside approved windows
0 %

Client sector

Multi-country enterprise with branch, industrial and production sites

Coverage

Multiple branch locations across several countries

Site architecture

WAN routers, LAN switches, ISP termination and SD-WAN edge

Phase 1

Site survey, infrastructure audit and dependency mapping

Phase 2

SD-WAN edge deployment, cutover and validation

Work windows

Approved maintenance windows, including nights and weekends

Result

All sites migrated with zero critical failures
  • PROJECT OVERVIEW

Verified infrastructure data before every production cutover.

An enterprise with branch sites in several countries needed accurate infrastructure data and a controlled migration path before moving its wide area network to SD-WAN.

Existing records did not always match the equipment and connections in each rack, so NGMS first surveyed and documented every site. The verified as-built data was then used to install, integrate and migrate the SD-WAN edge with minimal risk.

  • THE CHALLENGE

Multiple countries. Live networks. Controlled cutovers.

The programme combined dispersed locations, active mixed-vendor infrastructure, remote industrial sites and strict change-control windows for every migration.

Multi-Country Coordination

Surveys and migrations across several countries had to meet strict delivery timelines.

Live Infrastructure

Routers, switches, ISP devices and SD-WAN appliances carried live traffic during discovery.

Remote Site Access

Some industrial and production locations had limited physical access and dispersed routing.

Strict Change Windows

Production cutovers ran only inside approved night and weekend maintenance windows.

  • SCOPE OF WORK

Survey, document, deploy and migrate with one controlled workflow.

Phase 1 established verified rack, port and topology records. Phase 2 used those records to install and migrate the SD-WAN edge.

Site Survey & Audit

Rack elevations, WAN termination points and physical infrastructure captured on-site.

Dependency Mapping

WAN, LAN and SD-WAN links traced down to port level.

SD-WAN Edge Deployment

New edge appliances installed, cabled and provisioned for migration.

Cutover & Validation

Production traffic migrated inside approved windows and tested end to end.

  • OUR APPROACH

Discovery first. Controlled migration second.

NGMS combined physical discovery, standardized documentation and coordinated cutovers with the client’s network and change-management teams.

01 · Rack & WAN Discovery

Record rack elevations, ISP handoffs and WAN termination points.

02 · Connectivity Mapping

Trace router, switch and SD-WAN links down to port level.

03 · Edge Installation

Install and cable the SD-WAN edge using verified as-built records.

04 · Controlled Cutover

Move production traffic inside approved change windows.

05 · Validation & Handover

Verify WAN/LAN connectivity and close each change with consistent documentation.
All locations in scope migrated
All approved cutovers completed 100%
0 CRITICAL FAILURES · NO PRODUCTION DISRUPTION
  • RESULTS

All sites migrated without production disruption.

Every location in scope completed SD-WAN migration using verified survey data, standardized documentation and controlled maintenance-window cutovers.

Measure
Planned
Delivered
Sites surveyed & documented
All in scope
All completed ✓
Sites migrated to SD-WAN
All in scope
All completed ✓
Critical migration failures
Target: 0
0
Production service disruption
Target: none
None
Approved maintenance windows
Required
All cutovers completed ✓

All locations migrated. Zero critical failures. No production disruption.

Critical failures
0
Production disruptions
0
Approved-window cutovers
0 %
  • BUSINESS IMPACT

A safer foundation for network transformation.

Verified As-Built Data

Accurate rack, port and topology records removed guesswork from production cutovers.

Controlled Migration Risk

Survey data, standardised workflows and validation reduced change risk across every site.

Reliable Future Baseline

Consistent documentation now supports future changes, audits and troubleshooting.

  • FAQs

Frequently Asked Questions

A site survey confirms the real WAN circuits, devices and port connections at each location. Verified as-built data reduces the risk of cutover issues caused by outdated records.
The audit includes rack elevations, WAN termination points, port-level mappings and device dependencies between routers, switches and SD-WAN appliances.
Yes. When cutovers run inside approved maintenance windows and finish with end-to-end validation, production disruption can be avoided. No site in this programme suffered production disruption.
Yes. Using one field engineering partner for both phases keeps the documentation and cutover plan aligned and reduces handover errors.
  • LET’S WORK TOGETHER

Planning a multi-site SD-WAN migration?

NGMS can deliver a programme covering site surveys, infrastructure audits, SD-WAN edge deployment and controlled cutover across every location.
Request an SD-WAN Programme Plan