QUASAR 16-Node InfiniBand NDR Fabric

Overview

The QUASAR 16-Node InfiniBand NDR Fabric is a turnkey InfiniBand fabric that wires a GPU cluster end-to-end — switches, the subnet manager and the topology, providing 16 nodes · 64× 400G at 25.6 Tb/s aggregate over InfiniBand NDR (Quantum-2), with Sub-600 ns. It is the interconnect that turns a set of GPU servers into a cluster, carrying the collective (all-reduce) traffic that dominates multi-node AI training — on-premises, in INR, on a GST invoice.

Engineered as the fabric layer of an RDP AI cluster, it is delivered configured, cabled and validated alongside the compute and storage it connects.

Key highlights

• 16 nodes · 64× 400G · 25.6 Tb/s aggregate — a complete non-blocking fabric to wire a GPU cluster at full bandwidth.
• InfiniBand NDR (Quantum-2) — RDMA, lossless, in-network compute (SHARP) for fast collectives.
• Sub-600 ns — low latency so distributed training scales with near-linear efficiency.
• 400G per port — matched to your GPU NICs/DPUs.
• Turnkey, validated fabric — delivered cabled and tested as one system, not loose boxes.
• Validated with RDP compute & storage — part of a tested cluster.
• On-prem sovereignty — your fabric, your data path; DPDP-friendly, air-gappable.
• Make-in-India OEM — predictable INR pricing, GST tax invoice (HSN 8517), pan-India onsite support, GeM-procurable.

Where it fits

• GPU cluster fabric (primary): the interconnect that carries distributed-training collectives between GPU servers.
• Storage fabric: high-bandwidth path between GPU nodes and the NVMe parallel-FS (GPUDirect).
• Scale-out spine: a leaf/spine building block for larger clusters.
• HPC interconnect: tightly-coupled MPI and AI collectives.

How it works

The fabric forms a leaf/spine topology with RDMA over InfiniBand; the subnet manager programs routes, in-network compute (SHARP) offloads reductions, and adaptive routing avoids hotspots — so all-reduce traffic, which dominates multi-node training, completes fast. RDP sizes the topology (oversubscription, spine count, DPU count) to your cluster. Honest note: real scaling efficiency depends on topology, collective library and model — we validate it on your cluster, not just a peak number.

Industry use cases

• AI/ML & foundation-model teams — the fabric that lets training scale across nodes.
• Government & national labs — sovereign HPC/AI interconnect.
• Neocloud / AI providers — the fabric layer of a GPU cloud.
• BFSI & research — low-latency clusters for training and HPC.
• Telecom — high-bandwidth AI fabric at core/edge.
• Manufacturing & energy — HPC + AI cluster interconnect.

Performance — and how to be sure

We don’t publish inflated peak numbers. The honest picture: 25.6 Tb/s aggregate at Sub-600 ns is sized to carry cluster collectives without becoming the bottleneck. Want certainty? Request a free scaling test of your training job across nodes on this fabric before you buy; we’ll send back real all-reduce bandwidth and scaling efficiency.

Series & scale path

• QUASAR (performance fabric tier) — this.
• Speed ladder: 200G Ethernet → 400G NDR → 800G XDR InfiniBand.
• Scale: 16-node → 32 → 64 → 128+ node fabrics for thousands of GPUs.

On-prem vs cloud — the TCO case

An owned fabric is a one-time asset that removes the per-node networking premium of cloud GPU clusters and keeps the data path in-house. RDP pricing is fixed in INR with a GST input-credit-eligible invoice — ask for a fabric design and TCO for your cluster.

Software & integration

Integrates with the AI stack: the InfiniBand subnet manager, NCCL with SHARP and standard MPI, with fabric monitoring and telemetry. Validated with RDP GPU servers, rack-scale systems and storage.

Power, cooling & rack integration

A Single-switch fabric (1U) with redundant PSUs and front-to-back airflow — specify rack power, cooling and cable plant (DAC/AOC/transceivers). (Exact power draw, BTU and cabling confirmed on the build sheet.) Full out-of-band management.

Deployment, warranty & support

• Made to order, configured, cabled and validated in India as part of the cluster; lead time confirmed at quote.
• In the box: switches, rails, cables and the configured fabric profile; transceivers/cables scoped at quote.
• Onsite warranty + AMC with pan-India coverage and an RMA/escalation path (exact terms confirmed at quote).

Why RDP

14 years of Make-in-India infrastructure and 300,000+ devices shipped. Indian OEM, INR pricing, GST tax invoice, pan-India onsite engineers, GeM availability, and DPDP / sovereign-AI-ready deployment.

Buy with confidence

This is an AI cluster fabric, made to order — talk to an RDP solution architect, design the topology and oversubscription for your cluster, get a fabric TCO, and run a scaling test before you commit. Request a quote to begin.

Specifications