• Stack of five silver arista dcs-7280cr3-32d4-m 7280r3 32-port 100g switches with ethernet ports and blue accent lighting
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Arista

Arista DCS-7280CR3-32D4-M | 7280R3 32-Port 100G Switch, 4x 400G QSFP-DD

DCS-7280CR3-32D4-M

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Description

The Arista DCS-7280CR3-32D4-M is a high-performance 1RU data center switch router designed for demanding cloud, content delivery, and enterprise leaf-spine architectures. Featuring 32x 100GbE QSFP28 ports and 4x 400GbE QSFP-DD uplinks, it delivers 4.8 Tbps of non-blocking throughput with 8GB of deep packet buffer memory. The M variant includes expanded memory for enhanced routing scale, configurable fans, and PSU options, making it ideal for high-density 100G/400G deployments requiring advanced Layer 2/3 features, VXLAN, and MPLS support.

Features

Arista EOS operating system with modular architecture and hitless upgrades
- FlexRoute engine with flexible forwarding profiles for optimized table allocation
- Virtual Output Queuing (VOQ) architecture eliminates head-of-line blocking
- 8GB deep packet buffer for lossless forwarding and incast mitigation
- Layer 2 features: VLAN (4094), MLAG, STP/RSTP/MSTP, LACP, jumbo frames (9216 bytes)
- Layer 3 features: BGP, OSPF, IS-IS, MPLS, Segment Routing, VRF, 512-way ECMP
- VXLAN hardware acceleration with routing and bridging
- Algorithmic ACLs for scalable access control and policy-based forwarding
- Accelerated sFlow for line-rate network telemetry and monitoring
- IEEE 1588v2 PTP with hardware timestamping for precision timing
- Comprehensive QoS with 8 egress queues, traffic shaping, and policing
- Security: MACsec support (on specific variants), control plane policing, ACLs
- CloudVision integration for centralized management and automation
- Zero Touch Provisioning (ZTP) for rapid deployment
- Hot-swappable redundant power supplies and fan modules

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

32x 100GbE QSFP28 ports (support 100G/40G, breakout to 4x25G/4x10G)
- 4x 400GbE QSFP-DD ports (support 400G/200G/100G)
- Switching capacity: 4.8 Tbps full-duplex
- Forwarding rate: 2 Bpps (billion packets per second)
- Packet buffer: 8GB deep buffer with VOQ architecture
- Latency: 3.8 microseconds (store-and-forward)
- MAC address table: Up to 768,000 entries (profile-dependent)
- Routing capacity: Over 256K IPv4 routes (expanded memory variant)
- Expanded memory configuration for enhanced forwarding scale
- Configurable fan modules and power supply options
- Hot-swappable dual redundant 1000W power supplies (configurable AC/DC)
- Management: 1x 1GbE out-of-band, 1x RS-232 console port
- Form factor: 1RU (1.75" H x 17.5" W x 18" D)
- Operating system: Arista EOS (Extensible Operating System)

FAQs

Q: What is the difference between the DCS-7280CR3-32D4-M and standard 32D4 models?
A: The M variant features expanded memory for larger routing tables (over 256K routes vs. standard profiles), and includes configurable fan and PSU options rather than fixed AC power supplies. This provides greater deployment flexibility for diverse data center environments and airflow requirements.

Q: Can the QSFP28 ports support lower-speed optics for migration scenarios?
A: Yes, each QSFP28 port supports 100GbE, 40GbE, and can break out to 4x25GbE or 4x10GbE on alternate ports, providing migration flexibility from 10G/25G to 100G. The QSFP-DD ports support 400G, 200G, and 100G operation.

Q: What Layer 3 routing protocols are supported on this switch?
A: The 7280CR3-32D4-M supports comprehensive Layer 3 routing including BGP, OSPF, IS-IS, EIGRP, RIP, static routing, MPLS with LDP/RSVP-TE, Segment Routing, EVPN, VXLAN routing, and up to 512-way ECMP for load balancing.

Q: Is this switch suitable for spine or leaf deployments?
A: Yes, the 7280CR3-32D4-M is designed for both spine and leaf roles. Its 8GB deep buffer and VOQ architecture make it ideal for spine applications handling incast traffic, while the 32x 100G ports suit high-density leaf deployments with 400G uplinks.

Q: What management and automation capabilities does Arista EOS provide?
A: Arista EOS offers extensive automation via CloudVision integration, Zero Touch Provisioning (ZTP), eAPI RESTful API, Python/Bash scripting, NETCONF/RESTCONF, and streaming telemetry with sFlow, LANZ, and IPFIX for comprehensive network visibility and programmability.

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