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DESCRIPTION
Arista DCS-7280R4-32PE-F — 32×800GbE OSFP Switch Router with Front-to-Rear Airflow
The Arista DCS-7280R4-32PE-F is a 2RU switch router in the 7280R4 Series, delivering 25.6 Tbps of non-blocking switching capacity with 32 × 800GbE OSFP ports and 8 × 25GbE SFP25 ports. Built on Arista’s 7th-generation deep buffer VOQ ASIC platform with 32 GB of packet buffer memory and 3.8 µs store-and-forward latency, the R4-32PE provides full Layer 2/3 switch router capabilities including BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP LU), SR-TE, EVPN, VXLAN, and 512-way ECMP. The platform features an Eight-Core x86 CPU with 64 GB DRAM, 480 GB SSD storage, and a field-serviceable 7001-SUP-L supervisor module that can be replaced without removing the chassis from the rack.The “-F” suffix denotes front-to-rear airflow. The 7280R4-32PE is available exclusively in front-to-rear (-F) airflow configuration.
Key Features at a Glance
32 × 800GbE OSFP ports supporting 800G, 400G (2×400G), 100G (8×100G), 50G, and 25G breakout modes — up to 256 network interfaces plus 8 SFP25
8 × 25GbE SFP25 ports supporting 25G, 10G, and 1G line rates
2 × QSFP-LS ports for dedicated ZR/ZR+ line system optics
Hot-swappable dual PSU (1+1) and 4× N+1 fan trays; front-to-rear (-F) airflow
2RU form factor — 805W typical / 1874W maximum power draw
BrightStar Systems: Available from BrightStar Systems fully tested, reset to factory defaults, and backed by a 1-year in-house warranty
Deployment Scenarios
AI/ML Data Center Spine
32 × 800GbE OSFP ports deliver 25.6 Tbps non-blocking capacity for GPU cluster interconnect fabrics requiring maximum per-port bandwidth
32 GB VOQ deep buffer absorbs the bursty, incast-heavy traffic patterns characteristic of distributed training and inference workloads
Cluster Load Balancing (CLB) provides AI-aware RDMA queue pair placement for granular global flow optimization across leaf-spine fabrics
512-way ECMP with resilient hashing distributes elephant flows across all available spine paths without flow redistribution on link failure
Cloud and Internet Peering Router
FlexRoute engine supports scalable IPv4 and IPv6 routing tables for full Internet routing table deployment at border and peering positions
Line-rate MPLS label switching with LDP, RSVP-TE, and BGP Labeled Unicast (BGP LU) for carrier-grade transport and VPN services
SR-TE with TI-LFA provides sub-50ms convergence for traffic-engineered paths across multi-domain WAN topologies
2 × QSFP-LS ports support 400G and 800G ZR/ZR+ DWDM coherent optics for DCI without external transponders
5G and Carrier Infrastructure
Hardware-assisted PTP IEEE 1588v2 with OCXO oscillator and SyncE per ITU-T G.8264 deliver carrier-grade timing accuracy for 5G midhaul and backhaul aggregation
PTP profiles G.8275.1, G.8275.2, and G.8261 with PPS/10M/ToD inputs support both full on-path and partial timing architectures
EVPN-VXLAN overlay with MPLS underlay provides scalable L2 and L3 VPN services across metro and regional aggregation networks
800GbE OSFP density enables high-bandwidth aggregation of multiple cell site connections onto a single 2RU platform
25.6 Tbps Non-Blocking VOQ Architecture
The DCS-7280R4-32PE-F delivers 25.6 Tbps of full-duplex, non-blocking throughput — 32 × 800 Gbps in both directions simultaneously. The Virtual Output Queue (VOQ) ASIC architecture maintains separate queues for each input-to-output port pair, eliminating head-of-line blocking. With a 9.6 Bpps forwarding rate, the switch operates at full line rate across all port combinations regardless of traffic mix or packet size distribution.The 32 GB deep packet buffer is distributed across the VOQ structure, providing substantial burst absorption capacity. The VOQ deep buffer architecture handles transient congestion, TCP incast events, and bursty traffic patterns without triggering early packet drops or ECN marking — delivering higher effective throughput in oversubscribed topologies.
3.8 µs Store-and-Forward Latency
The 7280R4-32PE-F operates in store-and-forward mode with a measured latency starting from 3.8 microseconds. The ASIC receives the complete packet, performs a full Layer 2/3 lookup, applies ACLs and QoS policies, and forwards the packet — all within 3.8 µs. This design provides the ability to buffer, inspect, and apply policy at every forwarding decision, while maintaining sub-10-microsecond performance suitable for enterprise, service provider, and data center applications.
Port Configuration and Optics
The 7280R4-32PE-F provides 32 × 800GbE OSFP ports, 8 × 25GbE SFP25 ports, and 2 × QSFP-LS ports:
8 × 25GbE SFP25: Supporting 25G, 10G, and 1G line rates.
2 × QSFP-LS: Dedicated line system ports for 400G/800G ZR and ZR+ coherent DWDM optics.
Management: 1 × 100/1000 Mbps out-of-band management port + 1 × RS-232 RJ-45 console port + 1 × USB, independent of the forwarding plane.
Maximum port configurations: Up to 32 × 800G, 64 × 400G, 256 × 100G, 256 × 50G, or 256+8 × 25G interfaces. Maximum 256+8 total interfaces.
Layer 2/3 Switch Router Capabilities
The 7280R4-32PE-F operates as a unified switch router with full Layer 2 and Layer 3 feature sets:
BGP and Internet Routing: FlexRoute engine with scalable IPv4 and IPv6 routing tables and flexible allocation of L2 and L3 forwarding resources. Supports MP-BGP, BGP graceful restart, and 512-way ECMP for load balancing across equal-cost paths.
MPLS: Line-rate MPLS label switching with LDP, RSVP-TE, and BGP Labeled Unicast (BGP LU) for carrier-grade MPLS networks and VPN services.
Segment Routing: SR-TE (Segment Routing with Traffic Engineering), TI-LFA for fast convergence, OSPF-SR, ISIS-SR, and BGP-SR.
EVPN and VXLAN: VXLAN Tunnel Endpoint (VTEP) and EVPN control plane for multi-tenant overlay networks, data center interconnect, and MAC mobility. EVPN Integrated Routing and Bridging (IRB) for seamless L2/L3 overlays.
L2/L3 VPN Services: IP-VPN, EVPN over VXLAN and MPLS, LDP pseudowires, VPLS.
Precision Timing
PTP IEEE 1588v2: Hardware-assisted Precision Time Protocol with OCXO oscillator supporting Boundary Clock and Transparent Clock modes, with PTP profiles G.8275.1, G.8275.2, and G.8261. PPS/10M/ToD inputs for external timing reference.
SyncE: Synchronous Ethernet per ITU-T G.8264 for frequency distribution in carrier and 5G environments.
Telemetry, Monitoring, and Analytics
LANZ (Latency Analyzer): Per-port, real-time microburst detection and queue depth monitoring at microsecond granularity. Records egress port, queue, drop reason, and timestamp for every congestion event.
Accelerated sFlow: Hardware-accelerated sampled packet telemetry for flow analysis and capacity planning.
Inband Network Telemetry (INT): Per-flow monitoring of traffic drops, latency, congestion, and network path in real-time with no impact on switch performance. Exportable via IPFIX or sFlow.
Streaming Telemetry: Real-time counter and state export via gNMI (gRPC) and Arista eAPI (REST). Supports OpenConfig data models for vendor-neutral management.
Advanced Event Management (AEM): Programmable event-driven automation within EOS — customize alerts and actions, automate routine tasks, and respond to real-time network conditions.
DANZ: Arista’s telemetry fabric for advanced mirroring, SPAN/TAP aggregation, and L2/3/4 filtering.
EOS Automation and Provisioning
The 7280R4-32PE-F runs Arista EOS, a modular operating system built on a standard Linux kernel where each process runs in its own protected memory space and communicates through an in-memory state-sharing database (Sysdb). This architecture enables in-service software updates and self-healing resiliency without data plane interruption.
CloudVision: Centralized configuration management, network-wide change control, topology visualization, and compliance monitoring across multi-site Arista deployments.
Zero-Touch Provisioning (ZTP): Automatic configuration download on first power-up via DHCP — no manual CLI access required for initial deployment.
Python and Bash: Native on-box scripting with full Linux shell access for custom event handlers and automation workflows.
eAPI (JSON-RPC): RESTful programmatic interface to all configuration and operational commands. Integrates with Ansible, Terraform, and custom orchestration.
OpenConfig and gNMI: Vendor-neutral data models and high-performance streaming RPC for configuration and telemetry.
NETCONF and RESTCONF: Standards-based configuration management interfaces.
Security
Control Plane Policing (CoPP): Rate-limiting of CPU-destined traffic to protect routing stability
ACLs: Ingress/egress access control lists at L2, L3, and L4 enforced in the ASIC at line rate
TACACS+ and RADIUS: Centralized authentication and accounting for administrative access
Secure Boot: Cryptographic verification of bootloader and EOS image integrity with hardware trust anchors
MAC Security, DHCP Relay/Snooping, ARP trapping for Layer 2 security enforcement
Note: Wire-speed TunnelSec encryption (MACsec, IPsec, VXLANsec) is available on the K-variant DCS-7280R4K-32PE-F. The standard R4-32PE does not include encryption.
Quality of Service (QoS)
Up to 8 queues per port with strict priority, weighted round-robin (WRR), and weighted fair queueing (WFQ)
802.1p and DSCP classification and remarking
ECN (Explicit Congestion Notification) marking for TCP-friendly congestion signaling
PFC (Priority Flow Control) and DCBX (Data Center Bridging Exchange) for converged traffic
Power: 805W typical / 1874W maximum; PWR-3211 AC or DC power supplies
Redundancy: Dual hot-swappable PSU (1+1) and 4 hot-swappable FAN-7022HQ fan trays (N+1)
Supervisor: Field-serviceable 7001-SUP-L module with Eight-Core x86 CPU, 64 GB DRAM, 480 GB SSD
Storage: 480 GB SSD, 1 × USB port
System Memory: 64 GB DRAM, 32 GB packet buffer
Lifecycle and Reliability
Self-Healing Software: EOS includes Stateful Fault Repair (SFR) for automatic recovery from software faults without data plane impact, and Stateful Fault Containment (SFC) for fault isolation.
In-Service Software Updates: Dual-partition boot with Smart System Upgrade (SSU) and Accelerated Software Update (ASU) for planned upgrades with minimal disruption.
Field-Serviceable Supervisor: The 7001-SUP-L supervisor module can be replaced in minutes by a single engineer without disconnecting network cabling or removing the chassis from the rack.
BrightStar Systems 1-Year Warranty: Supplied fully tested, reset to factory defaults, and backed by a 1-year in-house warranty.
Scalability and Table Sizes
MAC Addresses: 384K
FlexRoute: Scalable IPv4 and IPv6 routing tables with flexible allocation of L2 and L3 forwarding table resources
ECMP: 512-way
Minimum EOS: 4.35.0
EOS Feature License: Group 5
Similar Arista Models to Consider
DCS-7280R4K-32PE-F: K-variant of the R4-32PE with TunnelSec wire-speed encryption (MACsec, IPsec, VXLANsec) on all OSFP ports, large-scale routing with over 5M IPv4 routes, and Algorithmic ACLs (400K+ rules)
DCS-7280R4-32DE-F: QSFP-DD variant with 32 × 800GbE QSFP-DD ports; same 25.6 Tbps throughput and 32 GB buffer in a QSFP-DD form factor
DCS-7280CR3K-96-F: R3 Series with 96 × 100GbE QSFP28 ports; 9.6 Tbps throughput; 16 GB packet buffer; 2RU form factor
Related 7280R4 Series Resources
For comprehensive technical documentation and comparative model information across the Arista 7280 family, visit Arista 7280 Series Overview.
Summary
The Arista DCS-7280R4-32PE-F is a 2RU switch router combining 32 × 800GbE OSFP ports with 8 × 25GbE SFP25 ports and 2 × QSFP-LS ports, 25.6 Tbps non-blocking throughput, 32 GB VOQ deep packet buffer, and full Layer 2/3 capabilities including BGP, MPLS, SR-TE, EVPN, and VXLAN. Featuring a field-serviceable 7001-SUP-L supervisor module, hardware-assisted PTP with OCXO and SyncE precision timing, Cluster Load Balancing, Inband Network Telemetry, and comprehensive telemetry (LANZ, Accelerated sFlow, AEM, DANZ), the 7280R4-32PE-F is available from BrightStar Systems fully tested, reset to factory defaults, and backed by a 1-year in-house warranty.
SPECIFICATIONS
Arista DCS-7280R4-32PE-F Technical Specifications
General Specifications
Model Name: DCS-7280R4-32PE-F
Form Factor: 2RU Rackmount
Dimensions (W × H × D): 44 × 8.79 × 62.85 cm (17.3 × 3.46 × 24.74 in)
QoS: Up to 8 queues per port; 802.1p and DSCP classification; ECN; strict priority, WRR, and WFQ scheduling; policing/shaping; ACL-based marking
Table Sizes and FlexRoute
MAC Addresses: 384K
FlexRoute: Scalable IPv4 and IPv6 routing tables with flexible L2/L3 forwarding resource allocation
ECMP: 512-way
Precision Timing
PTP IEEE 1588v2: Hardware-assisted Boundary Clock and Transparent Clock modes with OCXO; PTP profiles G.8275.1, G.8275.2, G.8261; PPS/10M/ToD inputs
SyncE: Synchronous Ethernet per ITU-T G.8264 for frequency distribution in carrier and 5G environments
Security Features
Access Control: IPv4/IPv6 ingress and egress ACLs (L2/L3/L4 fields), MAC ACLs, ACL drop logging and counters, Service ACLs
Secure Boot: Digitally signed EOS images ensure trusted software boot process
Authentication: TACACS+, RADIUS, SSHv2; Role-Based Access Control (RBAC); AAA
Control Plane Protection: Control Plane Policing (CoPP), DHCP relay/snooping, MAC Security, ARP trapping, uRPF
Note: Wire-speed TunnelSec encryption (MACsec, IPsec, VXLANsec) is available on the K-variant DCS-7280R4K-32PE-F only. The standard R4-32PE does not include encryption.
