Arista DCS-7280SR3-40YC6-F | 40x25G + 6x100G Switch Router

Arista DCS-7280SR3-40YC6-F — 40×25GbE SFP + 6×100GbE Switch Router with Front-to-Rear Airflow

Key Features at a Glance

• 40 × 25GbE SFP ports supporting 25G, 10G, and 1G speeds — configurable in groups of 4 for maximum flexibility
• 6 × 100GbE QSFP28 uplinks supporting breakout to 4×25GbE or 4×10GbE — up to 24 × 25G or 24 × 10G additional ports
• 800 Gbps non-blocking switching capacity with 1.0 Bpps (billion packets per second) forwarding rate
• 3.8 µs store-and-forward latency with 2 GB HBM2 packet buffer — eliminates head-of-line blocking
• Full Layer 3 switch router: BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP-LU), SR-TE, EVPN, VXLAN, 512-way ECMP
• Over 2M IPv4 LPM routes, over 1.4M IPv6 LPM routes, 384K MAC addresses — full Internet routing table support with hardware acceleration
• Quad-core x86 CPU with 8 GB DRAM (64 GB optional) running Arista EOS
• IEEE 1588v2 PTP with Synchronous Ethernet (SyncE) and telecom-grade timing (G.8275.1, G.8275.2, G.8261, G.8264)
• Telemetry: LANZ, Accelerated sFlow, Advanced Event Management (AEM), DANZ, INT, IPFIX, gNMI streaming
• CloudVision integration, Zero-Touch Provisioning (ZTP), Python/Bash scripting, NETCONF/RESTCONF, OpenConfig
• Hot-swappable dual PSU (1+1) and N+1 fan trays; front-to-rear (-F) airflow
• 1RU form factor — typical power draw with dual hot-swap redundant supplies
• BrightStar Systems: Supplied fully tested, reset to factory defaults, and backed by a 1-year in-house warranty

800 Gbps Non-Blocking VOQ Architecture

3.8 µs Store-and-Forward Latency

Port Configuration and Optics

• 40 × 25GbE SFP (25G/10G/1G configurable): Fiber-based SFP ports with speed negotiation in groups of 4. Supports 25GBASE-SR, LR, ER, ZR and 10GBASE-SR, LR, ER, ZR optics, plus direct attach copper (DAC) cables.
• 6 × 100GbE QSFP28: Support for 100GBASE-SR4, LR4, DR, FR, CWDM4, ZR/ZR+, and DAC/AOC cables. Breakout to 4×25GbE or 4×10GbE via standard breakout cables.
• Management: 1 × 100/1000 Mbps out-of-band management port + 1 × RS-232 RJ-45 console port, independent of the forwarding plane.
• Maximum port configurations: Up to 64 × 25GbE ports (40 SFP + 24 via QSFP28 breakout), or 6 × 100GbE + 40 × 25GbE in the base configuration.

Layer 2/3 Switch Router Capabilities

• BGP Full-Table Routing: Over 2M IPv4 unicast LPM routes and over 1.4M IPv6 LPM routes (FlexRoute) in the hardware FIB. Supports MP-BGP, BGP graceful restart, BGP FlowSpec, BGP Monitoring Protocol (BMP), BGP RPKI, and 512-way ECMP for load balancing across equal-cost paths.
• MPLS: Line-rate MPLS label switching with LDP, RSVP-TE with Fast Reroute (FRR), and BGP Labeled Unicast (BGP-LU) for carrier-grade MPLS networks and VPN services.
• Segment Routing: SR-TE and Topology Independent Loop-Free Alternate (TI-LFA) for simplified traffic engineering and rapid failover without per-path LSP state in the network core.
• EVPN and VXLAN: VXLAN Tunnel Endpoint (VTEP) and EVPN control plane with Integrated Routing and Bridging (IRB) for multi-tenant overlay networks, data center interconnect, and MAC mobility over both VXLAN and MPLS transports.
• Routing Protocols: OSPF, OSPFv3, IS-IS, RIPv2, VRF, BFD, Micro BFD, uRPF, VRRP, VRRP v3, VARP, and Policy-Based Routing (PBR) with Prefix-Independent Convergence (PIC) for rapid failure recovery.
• Layer 2: 802.1w/s Spanning Tree, RPVST+, 4096 VLANs, Q-in-Q, 802.3ad LACP (256 ports/channel, 2048 groups), MLAG (512 ports per MLAG), Jumbo Frames (9216 bytes), IGMP and PIM multicast snooping.

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 v5: Hardware-accelerated traffic sampling for flow analysis and capacity planning. Integrates with third-party collectors (Kentik, Splunk, Solarwinds).
• In-band Network Telemetry (INT): Packet-level telemetry for hop-by-hop latency, queue depths, and switch-local state information embedded in packet headers.
• IPFIX (IP Flow Information Export): NetFlow v10 standards-based flow data export for third-party analysis and capacity planning.
• 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 (14 sessions), port mirroring, SPAN/TAP M:N aggregation, and L2/3/4 filtering.
• IEEE 1588v2 PTP: Hardware-assisted Precision Time Protocol for synchronized network timing, supporting Boundary Clock and Transparent Clock modes with sub-microsecond accuracy.

EOS Automation and Provisioning

• 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.
• NETCONF and RESTCONF: Standards-based configuration protocols for vendor-neutral device management.
• OpenConfig and gNMI: Vendor-neutral data models and high-performance streaming RPC for configuration and telemetry.

Security

• Control Plane Policing (CoPP): Rate-limiting of CPU-destined traffic to protect routing stability
• ACLs and User-Defined Fields (UDF): Ingress/egress access control lists at L2, L3, and L4 with packet classification — over 100K algorithmic ACL entries 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
• MAC Security, DHCP Relay/Snooping, ARP trapping for Layer 2 security enforcement

Quality of Service (QoS)

• Up to 8 egress 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 and DCBX (Priority Flow Control and Data Center Bridging Exchange) for converged traffic and Hierarchical QoS (H-QoS) for granular traffic prioritization
• Egress shaping and policing per-interface and per-queue

Physical Specifications and Airflow

• Form Factor: 1RU — 19 × 1.75 × 16 inches (48.3 × 4.4 × 40.6 cm)
• Weight: Approximately 10.1 kg (22.2 lbs)
• Power: Dual hot-swappable PSU (1+1) redundancy; AC or DC power supplies
• Cooling: Three hot-swappable N+1 redundant fan trays
• Storage: 8 GB Flash, optional SSD, 2 × USB ports
• Compliance: FCC Class A, CE, RoHS, WEEE

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.
• Configuration Rollback: Instant rollback to previous configuration snapshots via EOS configuration replace.
• 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
• IPv4 Host Routes: 768K
• IPv4 Unicast LPM Routes: Over 2M
• IPv6 Unicast LPM Routes (FlexRoute): Over 1.4M
• Algorithmic ACLs: 100K+
• ECMP: 512-way

System Resources

• CPU: Quad-core x86 processor
• System Memory: 8 GB DRAM (64 GB optional for extended route table support)
• Packet Buffer: 2 GB HBM2 (High Bandwidth Memory) integrated on switching ASIC
• Flash Storage: 8 GB
• USB Ports: 2 × USB for external storage and upgrades

Similar Arista Models to Consider

• DCS-7280SR3K-48YC8-F: Higher-density variant with 48 × 25G SFP and 8 × 100G QSFP28 ports delivering 2 Tbps throughput with 4 GB buffer and 512-way ECMP.
• DCS-7280SRA-48C6-F: First-generation 7280R platform with 48 × SFP+ (1/10G) and 6 × QSFP28 ports featuring AlgoMatch algorithmic traffic management.
• DCS-7280CR3K-32P4-F: High-density 100G/400G variant with 32 × QSFP28 and 4 × OSFP ports for maximum port density and 25.6 Tbps throughput.

Related 7280 Series Resources

Summary

• 1-Year BrightStar warranty for end user customers
• 90-Day BrightStar Warranty for resellers

• Free FedEx Ground shipping within the United States
• FedEx Overnight shipping available as well
• FedEx International Shipping available for customers outside of the United States