Service provider backbones. Hyperscaler data center fabrics. AI/ML training clusters. Cable broadband access networks. R5 Networks brings deep protocol expertise and operational rigour to the most demanding network environments on the planet.
We operate at the intersection of protocol design, large-scale operations, and emerging AI infrastructure.
We design and deploy carrier-grade MPLS/Segment Routing backbones with RSVP-TE traffic engineering, L3VPN/L2VPN services, and inter-AS architectures that span continents. Our engineers understand the control plane at the RFC level.
Multi-stage Clos fabric design for 100G/400G/800G environments. We build spine-leaf and fat-tree topologies with EVPN-VXLAN overlays, BGP-based underlay automation, and hitless upgrade strategies for fabrics that can never go down.
Purpose-built fabrics for GPU clusters and distributed training workloads. We design lossless RDMA networks with RoCEv2, ECN-based congestion control, and rail-optimised topologies that keep thousands of GPUs fed at line rate.
End-to-end cable broadband architecture — from CMTS/CCAP core design and DOCSIS 3.1/4.0 deployment to Remote PHY distributed access, RPDS, and converged interconnect networks. We help operators deliver multi-gig services and plan the transition to fibre-deep and FTTH.
Comprehensive IPv6 strategy and deployment — from native dual-stack rollouts and IPv6-only data center designs to transition mechanisms like NAT64/DNS64 and 464XLAT. We've helped operators move millions of subscribers to IPv6.
BGP policy design at scale — route server integration, IX peering strategy, transit optimisation, and Flowspec-based DDoS mitigation. We build routing architectures that minimise cost while maximising performance and resilience.
Model-driven programmability with YANG, gNMI, and gRPC. We build CI/CD pipelines for network config, streaming telemetry stacks, and source-of-truth systems that bring software engineering discipline to network operations.
Engagement models built for complex infrastructure programmes.
High-level and low-level design for greenfield builds or network transformations. We produce detailed design documents, BOMs, and migration runbooks that your team can execute with confidence.
Hands-on-keyboard build-out and commissioning. We work alongside your NOC to bring new infrastructure into production — from initial bring-up through traffic migration and acceptance testing.
Tier-3 and Tier-4 escalation engineering for your most complex incidents. MPLS LSP failures, BGP route leaks, fabric congestion events — we've debugged them all and we'll debug yours.
Custom training programmes on SP technologies, data center fabrics, and modern protocols. We upskill your engineering team so they can own and evolve the infrastructure long after our engagement ends.
R5 Networks is a specialist network engineering consultancy. We were founded by engineers who spent their careers inside service providers, hyperscalers, and cable operators — building the infrastructure that carries the internet's traffic.
We don't do desktop support. We don't sell boxes. We solve hard networking problems. Our engineers hold deep expertise in protocol internals and have operated networks measured in terabits per second.
When your architecture review needs someone who can read a packet capture at the RSVP object level, your Clos fabric design needs an engineer who's built them for some of the world's largest clouds, or your CCAP migration needs someone who's done it before at scale — that's when you call R5.
Whether you're planning a new fabric, migrating to Segment Routing, rolling out DOCSIS 4.0, or need Tier-4 escalation support — we'd like to hear about it.