Arista DCS-7060CX-32S-R — 32×100G High-Performance Spine Switch with Reverse Airflow
The
Arista DCS-7060CX-32S-R is a 1RU, 32-port 100G spine switch built on the first-generation 7060X platform. Delivering
6.4 Tbps of non-blocking switching capacity,
450 ns cut-through latency, and a
16 MB shared packet buffer, it is a proven spine-layer platform for high-density 25G/100G leaf-spine fabrics in cloud-scale data centers, financial trading infrastructure, HPC clusters, and large enterprise environments. The 7060CX-32S is a mature, widely deployed spine platform with an established production track record across global data center operators. The “
-R” suffix denotes
rear-to-front (reverse) airflow, making this model ideal for data centers, labs, and mixed-equipment racks that standardize on reverse thermal design.
Key Features at a Glance
- 32 × 100GbE QSFP28 ports with 5-speed flexibility: 100G, 40G, 4×25G, 4×10G, or 2×50G per port
- 6.4 Tbps non-blocking switching capacity — full wire speed across all 32 ports simultaneously
- 450 ns cut-through latency for latency-sensitive financial and analytics workloads
- 16 MB shared packet buffer dynamically allocated to congested ports for fair queuing
- Broadcom Tomahawk ASIC — proven, production-hardened silicon used in data centers globally
- Rear-to-front airflow (“-R”) for reverse-cooled data centers and lab environments
- Redundant, hot-swappable power supplies and fan trays for continuous high availability
- Full L2/L3 feature set: VXLAN, EVPN, MLAG, ECMP, BGP, and advanced routing
- Rich telemetry: LANZ, sFlow, AEM, and streaming telemetry
- Runs Arista EOS® with open APIs, Python/Bash scripting, and CloudVision® integration
Proven Spine Performance: 6.4 Tbps on Broadcom Tomahawk
The
7060CX-32S is built on Broadcom’s Tomahawk ASIC (BCM56960), the silicon that established the 100G data center switching standard and powers a significant share of production spine deployments globally. This platform heritage matters: Tomahawk silicon has been extensively production-validated across hyperscale, financial, and enterprise environments, with the full depth of EOS feature development concentrated on this architecture over years of active deployment. For fabric architects evaluating the 7060CX-32S-R against the next-generation 7060CX2-32S-R: both platforms deliver identical 6.4 Tbps throughput and 450 ns latency. The 7060CX-32S-R offers a proven, cost-effective spine option where the CX2’s 40% deeper buffer (22 MB vs 16 MB here) is not a deciding architectural factor. It is particularly well suited for fabrics where traffic patterns are predictable and congestion is managed at the leaf rather than at the spine.
6.4 Tbps Non-Blocking Architecture
The
DCS-7060CX-32S-R delivers
6.4 Tbps of full-duplex, non-blocking switching capacity across all 32 QSFP28 ports. Every port operates simultaneously at 100G line rate without oversubscription — the fundamental requirement for spine switches where east-west bandwidth is the primary architectural constraint. This throughput ceiling is maintained consistently regardless of traffic mix, packet size distribution, or active flow count, delivering the predictable performance that production leaf-spine fabrics depend on.
450 ns Cut-Through Latency
In cut-through switching mode, the
7060CX-32S-R delivers
450 nanoseconds of port-to-port latency with low jitter across all 32 ports. This sub-microsecond performance makes it suitable for high-frequency trading platforms, real-time analytics pipelines, and distributed financial processing systems where spine-layer latency directly impacts application performance and round-trip times across the fabric.
Port Density and 5-Speed Flexibility
The 7060CX-32S provides
32 × QSFP28 ports, each configurable at five different speeds:
- 100GbE — native full-rate for spine-to-spine or spine-to-DCI connections
- 40GbE — backward compatibility with existing 40G leaf switches and uplinks
- 4 × 25GbE breakout — connect up to 128 leaf switches from a single spine
- 4 × 10GbE breakout — legacy 10G endpoint or switch connectivity
- 2 × 50GbE breakout — dual 50G connectivity for bonded NICs or storage nodes
The 16 MB shared buffer pool is dynamically allocated across all ports, concentrating available buffer depth on whichever ports experience congestion at any given moment — a more efficient approach than fixed per-port buffer allocation.
Optics, Cables, and Interoperability
The
DCS-7060CX-32S-R supports a broad ecosystem of standards-based
optics and cables:
- 100G QSFP28: 100GBASE-SR4, LR4, ER4, PSM4; QSFP28 DACs and AOCs for short-reach spine-to-leaf connections
- 40G QSFP+: 40GBASE-SR4, LR4; QSFP+ DACs for backward-compatible uplinks
- Breakout cables: MPO-to-LC fan-out cables for 4×25G or 4×10G configurations
Spine-Optimized Fabric Support: VXLAN, EVPN, and ECMP
The
7060CX-32S-R is purpose-built for the spine layer of modern leaf-spine architectures:
- VXLAN: Spine-layer VXLAN routing for scalable overlay fabrics with large VNI counts
- EVPN: BGP-based control plane for distributed MAC/IP learning, multi-tenancy, and workload mobility
- Up to 128-way ECMP: Maximum path diversity across the spine layer for balanced east-west traffic distribution
- BGP and IS-IS: Full-featured underlay routing for IP fabric and routed-spine topologies
Telemetry, Monitoring, and Real-Time Insight
- LANZ (Latency Analyzer): Per-port, real-time queue depth visibility and microburst detection at the spine layer
- sFlow: Continuous traffic sampling for east-west flow analysis and capacity planning
- AEM (Arista Event Monitor): Programmable alerting for link events, queue thresholds, and routing state changes
- Streaming Telemetry: High-frequency counter and state export to gRPC collectors, Grafana, Prometheus, and third-party NMS tools
EOS Automation and Extensibility
- Native on-box Python and Bash scripting via the Linux shell
- JSON-RPC eAPI for programmatic configuration — integrates with Ansible, Terraform, Salt, and Nornir
- CloudVision® for centralized configuration management, zero-touch provisioning, and change control
- OpenConfig and gNMI/gRPC for model-driven management and streaming state export
Rear-to-Front Airflow and Environmental Efficiency
The “
-R” airflow configuration provides
rear-to-front (reverse) cooling, ideal for:
- Environments where cold air is introduced at the rear of the rack
- Labs and PoC environments with mixed vendor airflow conventions
- Rows where the majority of installed gear already uses reverse airflow
- Data centers separating port-side cabling from airflow exhaust paths
The switch includes
variable-speed fans and
redundant, hot-swappable power supplies. If your racks use
front-to-rear (forward) airflow, consider the
DCS-7060CX-32S-F — identical in every respect except airflow direction.
Compliance and Sustainability
- RoHS and WEEE compliant — energy-efficient Tomahawk silicon contributes to lower power per gigabit
- Secure boot with digitally signed EOS images
- Compact 1RU form factor maximizes port density per rack unit in spine aggregation rows
Security Features
- Secure boot and digitally signed EOS images
- Role-Based Access Control (RBAC)
- TACACS+/RADIUS/LDAP for centralized authentication and accounting
- ACLs for traffic policy and segmentation enforcement
- Control Plane Policing (CoPP)
Deployment Scenarios and Industry Applications
- 25G/100G Leaf-Spine Fabrics: Proven spine pairing for Arista 7050SX3-series leaf switches — 32×100G non-blocking uplinks for full-bisection-bandwidth designs.
- High-Frequency Trading Infrastructure: 450 ns cut-through latency for trading floor core switching and inter-pod connectivity.
- Hyperscale and Cloud Data Centers: 6.4 Tbps non-blocking capacity with 128-way ECMP for fabric designs at scale.
- HPC and Research Clusters: High-bandwidth spine interconnect for parallel computing, MPI workloads, and scientific simulation.
- Large Enterprise Data Centers: Reliable, cost-effective spine platform with proven EOS feature depth and a mature operational track record.
Lifecycle, Reliability, and Future-Proofing
The
7060CX-32S-R is built for long operational lifecycles with high MTBF ratings, field-replaceable fans and power supplies, and full EOS support. Its Broadcom Tomahawk ASIC is one of the most widely deployed and thoroughly tested data center switching platforms in the industry, providing operators confidence in long-term software support, vendor interoperability, and operational familiarity across large switch fleets.
Competitive Comparison
- Versus Arista DCS-7060CX2-32S-R: The CX2 adds 40% deeper buffer (22 MB vs 16 MB here) and native 25GbE support. For bursty east-west workloads, the CX2 provides more congestion headroom; the 7060CX-32S-R offers proven value where the additional buffer is not a deciding factor.
- Versus Cisco Nexus 9332C: Comparable 32×100G spine platform; the 7060CX-32S-R differentiates on lower latency, LANZ buffer visibility, and Arista EOS’s automation ecosystem.
- Versus Juniper QFX5200-32C: Similar port density; the 7060CX-32S-R differentiates on EOS automation depth and native CloudVision integration.
Similar Arista 7060 Models to Consider
- Arista DCS-7060CX-32S-F – Identical to this model but with front-to-rear (forward) airflow, the standard choice for hot-aisle/cold-aisle deployments.
- Arista DCS-7060CX2-32S-R – Next-generation CX2 with same ports and throughput, 22 MB buffer (40% more), and native 25GbE — same reverse airflow.
- Arista DCS-7280CR3-32D4-F – 32×100G + 4×400G switch router with 8 GB buffer and full MPLS/SR routing for DCI-edge deployments.
- Arista DCS-7050SX3-48YC8-R – 48×25G + 8×100G leaf switch, the natural leaf pairing for 7060CX-32S-R spine deployments.
Related 7060X Resources
Arista 7060 Series Switches: Architecture, Models, and Deployment Guide
The Proven 100G Spine for Production Leaf-Spine Fabrics
The
Arista DCS-7060CX-32S-R brings together 6.4 Tbps of non-blocking capacity, 450 ns cut-through latency, 32-port 100G density, and the proven Broadcom Tomahawk platform into a mature, production-validated 1RU spine switch. Its rear-to-front airflow makes it the right choice for reverse-cooled data centers, labs, and mixed-vendor racks. Its full EOS feature set — from VXLAN/EVPN to LANZ telemetry and CloudVision automation — makes it ready to support any modern data center architecture. Available from BrightStar Systems fully tested, reset to factory defaults, and backed by a 1-year in-house warranty.
Q: What environments is the DCS-7060CX-32S-R best suited for?
A. This switch is ideal for cloud data centers, high-performance computing, and any environment requiring high-density 100GbE connectivity.
Q: Does it support rear-to-front airflow?
A. Yes, the DCS-7060CX-32S-R features rear-to-front airflow, making it perfect for racks with back-to-front cooling designs.
Q: What kind of operating system does the switch run?
A. The switch runs on Arista EOS, which offers programmability, automation, and real-time network visibility.
Q: Is the switch equipped with redundant power supplies?
A. Yes, the DCS-7060CX-32S-R is designed with dual redundant, hot-swappable power supplies to ensure maximum uptime.
