SD-WAN

Software-Defined WAN, the overlay-based architecture replacing traditional hub-and-spoke MPLS in enterprise networks. Articles tagged SD-WAN cover architecture, Cisco Catalyst SD-WAN (Viptela), SASE convergence, deployment models, and day-2 operational realities.

11 posts

SD-WAN

Cisco Catalyst SD-WAN: The Rebrand, the Architecture, OMP

Cisco Catalyst SD-WAN (formerly Viptela / Cisco SD-WAN): the naming history, the four-plane architecture, OMP routing, and the zero-touch edge onboarding flow.

Jun 1, 2026 4 min read

MPLS

MPLS L3VPN vs SD-WAN: When to Migrate

A decision framework for migrating from MPLS L3VPN to SD-WAN: what's different, when to migrate, the 7-step transition that works, and when the right answer is to stay.

May 21, 2026 5 min read

SD-WAN

SD-WAN: What Is It? The 5-Minute Primer

SD-WAN in five minutes: what it is, what it replaces, the four-plane architecture, transport-independent overlays, and how it stacks against traditional MPLS WANs.

May 19, 2026 4 min read

QoS

QoS in Modern Networks: SD-WAN, Cloud, and Application-Aware Steering

QoS in 2026 is application-aware steering at the SD-WAN edge plus local queueing per tunnel. Why DSCP stops being honored at administrative boundaries, and how SD-WAN path conditioning compensates.

Apr 25, 2026 7 min read

SD-WAN

SD-WAN Security and the SASE Convergence

SD-WAN provides encryption and segmentation but creates an inspection gap. SASE fills that gap with cloud-delivered SWG, CASB, FWaaS, ZTNA, and DLP. The 2026 vendor landscape compared.

Apr 25, 2026 6 min read

SD-WAN

SD-WAN Deployment Models: Hybrid, Internet-Only, and Cloud On-Ramp

The four SD-WAN branch deployment models compared (hybrid, internet-only, cloud on-ramp, multi-cloud), HQ patterns, and the typical 18-30 month migration from MPLS-only.

Apr 25, 2026 6 min read