• Stack of four silver arista dcs-7280sr3mk-48yc8a-s-flx-r network switches with multiple ports and ventilation grilles
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Arista

Arista DCS-7280SR3MK-48YC8A-S-FLX-R | 7280R3 48-Port 25G MACsec Switch, 8x 100G QSFP28

DCS-7280SR3MK-48YC8A-S-FLX-R

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Description

The Arista DCS-7280SR3MK-48YC8A-S-FLX-R is a high-performance Layer 2/3 data center switch router designed for cloud, content delivery, and service provider networks. It features 48x 25GbE SFP28 ports with MACsec encryption and 8x 100G QSFP28 uplinks, delivering 2.4 Tbps wire-speed throughput with 4GB packet buffer and ultra-low latency. The K variant supports FlexRoute for over 256,000 routes with MPLS and VXLAN capabilities, while the A variant includes an enhanced eight-core x86 CPU, 64GB DRAM, and 120GB SSD for demanding routing and telemetry workloads. This model includes rear-to-front airflow, dual redundant AC power supplies, secure boot, and the FLX-Lite license for advanced routing features.

Features

MACsec AES-256-GCM encryption at line rate on all 48x 25G and 8x 100G ports
- FlexRoute engine with up to 256K IPv4 routes, scalable to over 5M routes with profile changes
- Algorithmic ACLs supporting 100K+ rules for flexible access control and policy-based forwarding
- EVPN-VXLAN overlay networking with hardware VTEP support
- MPLS and Segment Routing (SR) for service provider and WAN edge deployments
- Comprehensive Layer 2 features: MLAG, VLAN, STP/RSTP/MSTP, LACP, LLDP
- Advanced Layer 3 routing: BGP, OSPF, IS-IS, PIM, multicast, VRF
- Dynamic deep buffering with VOQ architecture for lossless forwarding
- Precision timing with IEEE 1588v2 PTP and Synchronous Ethernet (SyncE)
- Inband Network Telemetry (INT) for real-time per-flow latency and drop monitoring
- LANZ for microburst detection and DANZ for advanced network mirroring
- Zero Touch Provisioning (ZTP) and CloudVision integration for automation
- Redundant hot-swappable power supplies and fan modules for high availability
- sFlow and NetFlow for comprehensive traffic visibility and analysis
- Secure Boot for trusted hardware and software integrity
- Arista EOS with Linux shell access for open programmability and automation

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Technical Specifications

Port Configuration: 48x 25GbE SFP28 ports (1G/10G/25G capable), 8x 100GbE QSFP28 ports (40G/100G capable with breakout support)
- Switching Capacity: 2.4 Tbps wire-speed performance (4.8 Tbps full duplex)
- Forwarding Rate: 1 Bpps (billion packets per second)
- Packet Buffer: 4GB deep buffer for burst absorption and lossless forwarding
- Latency: Ultra-low latency from 3.8 microseconds
- Security: MACsec AES-256-GCM encryption on all ports, Secure Boot enabled
- Routing Scale: FlexRoute supports up to 256K IPv4 routes with FLX-Lite, MPLS, VXLAN, Segment Routing
- Memory & Storage: 64GB DRAM, 120GB SSD, 8-core x86 CPU
- Management: Arista EOS, CLI, REST API, SNMP, CloudVision integration, ZTP
- Form Factor: 1RU rackmount chassis with rear-to-front airflow (blue ports)
- Power: Dual redundant AC power supplies (PWR-1011-AC-BLUE, 1000W each), hot-swappable
- Operating Temperature: 0°C to 40°C (dependent on airflow and optics)
- Cooling: Hot-swappable redundant fan modules (rear-to-front airflow)

FAQs

Q: What is the difference between the K, M, and A suffixes in this SKU?
A: The K variant enables FlexRoute with expanded routing table support beyond 256K routes. The M indicates MACsec encryption hardware on all ports. The A variant includes an enhanced 8-core x86 CPU with 64GB DRAM and 120GB SSD for advanced telemetry and routing features.

Q: What does the FLX-Lite license include?
A: The FLX-Lite license provides full routing up to 256K routes with support for EVPN, VXLAN, Segment Routing, and base MPLS LSR functionality. It does not include traffic engineering or link/node protection features, which require the full FLX license upgrade.

Q: Can this switch be used in a leaf-spine data center architecture?
A: Yes, the DCS-7280SR3MK-48YC8A-S-FLX-R is ideal for both leaf and spine roles. The 48x 25G ports provide high-density server connectivity in leaf deployments, while the 8x 100G uplinks enable high-bandwidth spine connectivity or data center interconnect.

Q: What is the significance of rear-to-front airflow?
A: The -R suffix indicates rear-to-front (reverse) airflow, where cool air enters from the fan/PSU side and exhausts through the front port side. This is designed for cold-aisle containment deployments and must match the airflow direction of other equipment in the same rack.

Q: Does this switch support EVPN-VXLAN for network virtualization?
A: Yes, with the FLX-Lite license included, this switch fully supports EVPN-VXLAN for modern data center overlay networks, enabling Layer 2 and Layer 3 network virtualization, multi-tenancy, and seamless workload mobility across the data center.

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