Architect the Network
Your Enterprise Demands.
A purpose-built network architecture strategy for enterprises operating at scale — from multi-site campus fabrics to converged cloud interconnect, designed for perpetual availability, governance, and deterministic performance.
Infrastructure That Scales. Architecture That Governs.
Enterprise growth does not fail because of insufficient bandwidth — it fails because the underlying architecture was not designed to accommodate it. Undocumented topology changes, fragmented policy domains, and legacy switching stacks become compounding liabilities that compound with every new workload.
Torsido delivers end-to-end enterprise network architecture engagements: from initial topology assessment and design authority through to phased deployment, policy governance, and lifecycle optimisation. Every architecture we produce is driven by a formal requirements model, validated against failure scenarios, and handed over with complete documentation — including as-built diagrams, runbook libraries, and an automation baseline your operations team can maintain with confidence.
Our architecture standards are drawn from operational experience across regulated industries. We impose the same rigour on a 200-seat professional services firm as we do on a 12,000-node financial institution, because the principles that deliver five nines of availability don't change with scale — only the implementation complexity does.
Architecture-First Methodology
All engagement commences with a structured architecture review. No hardware is specified until traffic flows, failure domains, and growth scenarios are fully modelled against your operational requirements.
Governance-Ready Design
Every architecture deliverable includes a policy authority model, change control framework, and compliance alignment matrix. Governance is embedded in the architecture, not retrofitted after deployment.
Automation by Default
Network-as-Code principles are applied from the design phase. Configuration templates, CI/CD pipelines for network change, and intent-based verification are standard deliverables — not optional add-ons.
Lifecycle Cost Engineering
Platform selection accounts for five-year TCO, not initial procurement cost. We model power, space, support, and operational overhead against capacity requirements before a single vendor is recommended.
| Domain | Tier | Policies | Status |
|---|---|---|---|
| Core Fabric | T1 | 142 | COMPLIANT |
| Campus Access | T2 | 218 | COMPLIANT |
| Cloud Extensions | T1 | 76 | COMPLIANT |
| OT Segments | T3 | 54 | COMPLIANT |
| Guest/IoT Isolation | T3 | 31 | COMPLIANT |
Six Domains. One Coherent Architecture.
Enterprise Network Architecture is not a single deliverable — it is the coordinated design of six interdependent technical domains, each engineered to a common standard and maintained under a unified governance model.
Campus & WAN Topology
Hierarchical three-tier and collapsed core campus designs, structured cabling plant, Wi-Fi 6E RF architecture, and WAN connectivity strategy. Engineered for five-year capacity headroom with defined upgrade milestones.
Data Centre Fabric
Leaf-spine topology with BGP EVPN and VXLAN overlays, optimised for east-west traffic dominance and workload mobility. Designed from day one for multi-tenancy, automation, and sub-millisecond latency at scale.
SD-WAN & Cloud Interconnect
Intelligent overlay fabric spanning branch offices, co-location facilities, and multi-cloud environments. Application-aware path selection, per-policy QoS, and encrypted tunnels that replace legacy MPLS at sustainable cost.
Zero Trust Security Architecture
Network access policy based on verified identity, device posture, and contextual risk — not implicit trust from network location. ZTNA, micro-segmentation, and encrypted overlay fabrics applied as architectural primitives.
Observability & Assurance
Telemetry architecture from device-level SNMP to streaming gRPC for real-time intent verification. Centralised NOC visibility, capacity forecasting models, and automated SLA assurance across all architecture domains.
Network Automation & IaC
Network-as-Code delivery using Ansible, Terraform, and vendor-native APIs. CI/CD pipelines for validated network change, configuration drift detection, and automated rollback — enabling your team to operate with confidence.
Engineering Depth Across Every Layer.
Our architecture team holds CCIE, JNCIE, and PCNSE accreditations and operates at the intersection of large-scale network design and modern DevSecOps disciplines — a combination that is exceedingly rare and operationally decisive.
Topology Modelling & Failure Analysis
Formal traffic flow modelling, failure domain isolation, and blast radius analysis before any architecture decision is finalised. We validate every design against documented failure scenarios — not just the common case.
Multi-Protocol Routing Architecture
Advanced BGP policy design, OSPF area optimisation, EIGRP migration strategy, and inter-AS path engineering for multi-site and multi-provider environments.
Data Centre Fabric Engineering
Full VXLAN / BGP EVPN fabric design including overlay segmentation, distributed anycast gateway, and multi-site DCI. Vendor-validated on Arista, Cisco Nexus, and Juniper QFX platforms.
Cloud-Native Network Integration
Transit gateway architecture, AWS and Azure network topology design, VPC peering strategy, and hybrid connectivity options including Direct Connect, ExpressRoute, and SD-WAN overlay extensions.
Network Automation Engineering
Infrastructure-as-Code pipeline design, YANG model development, Ansible playbook libraries, and Terraform provider integration for full network lifecycle management under version control.
| Component | Redundancy | RTO | State |
|---|---|---|---|
| Spine Tier | 2N | <50ms | HEALTHY |
| Leaf Fabric | N+1 | <200ms | HEALTHY |
| Border Gateways | Active/Active | <100ms | HEALTHY |
| Cloud Extensions | Dual-Path | <500ms | HEALTHY |
A Structured Path From Strategy to Operation.
Enterprise network architecture is not delivered in a single sprint. Our engagement model reflects the complexity of large-scale change — with rigorous checkpoints, formal sign-off gates, and knowledge transfer built in at every stage.
Architecture Assessment
A comprehensive review of your current topology, traffic patterns, failure history, and operational constraints. We produce an Architecture Assessment Report with specific gap analysis, risk scoring, and prioritised recommendations — with no obligation to proceed further.
2–4 WeeksReference Architecture Design
Development of a vendor-agnostic Reference Architecture document including logical topology, addressing plan, routing policy design, security domain model, and automation framework. All deliverables are reviewed and signed off by your technical stakeholders before any implementation begins.
4–8 WeeksPhased Implementation
Structured deployment in sequenced phases, each with a defined scope, success criteria, and rollback procedure. Implementation teams are augmented by dedicated architecture oversight to ensure the deployed state matches the approved design at every milestone.
VariableTransition & Lifecycle
Full knowledge transfer to your operations team including as-built documentation, runbook libraries, automation pipeline handover, and a 90-day warranty period. We remain available as Architecture Authority for change advisory and annual architecture reviews.
OngoingDeployments Where Architecture Was the Difference.
Three engagements. Three organisations where the absence of coherent architecture was a direct operational liability — and where a principled architecture intervention changed the outcome.
Multi-Site Trading Infrastructure Consolidation
A tier-1 investment bank operating 14 data centres across three continents on inconsistent switching platforms with no common automation framework. Each site had been built by different teams with different standards, creating an unmanageable operational surface.
NHS Trust Hybrid Cloud Network Architecture
A large integrated care system required a compliant hybrid architecture to extend clinical workloads to both Azure and AWS while maintaining DSPT compliance, clinical network isolation, and connectivity to national health data services.
National Grid OT/IT Convergence Architecture
A regulated energy transmission operator required a zero-trust architecture to safely converge operational technology networks with enterprise IT, satisfying NCSC CAF requirements while enabling centralised operational visibility across 60 substations.