Inside the SASE Rollout That Cut WAN Costs by 30% in One Fiscal Year

Secure access service edge, or SASE, has been promoted as the future of enterprise networking for several years. A phased rollout across 220 branch sites at a services company offers a realistic look at what the journey involves — and how it cut wide-area network costs by thirty percent in a single fiscal year.

Why the company moved

The organisation was paying for expensive private circuits to every branch, then routing internet traffic back through central data centres for security inspection. As most applications moved to the cloud, that design added cost and latency while protecting less and less.

“We were hauling traffic hundreds of miles to inspect it, only to send it straight back out to a cloud application.”

How the rollout was phased

• Pilot at ten branches chosen for their variety, not their simplicity
• Broadband and wireless links added before private circuits were removed
• Security policies migrated and tested before each region cut over
• Private circuits retired only after sites ran stably for a full billing cycle

Where the savings came from

Most of the thirty percent reduction came from replacing private circuits with business broadband and wireless backup. Additional savings came from retiring branch firewalls and centralising policy management in a single platform.

What took longer than expected

Policy migration was the slowest part. Years of firewall rules had accumulated, many undocumented. Cleaning them up delayed the schedule but left the company with a far simpler security posture than before.

For organisations planning SASE, the message is that the technology is mature. The time goes into the policies, the contracts and the careful sequencing of change.