• Model: Arista DCS-7280CR3-32D4-R
• Series: Arista 7280R3
• Form Factor: 1 RU (Rack Unit)
• Airflow: Front-to-back airflow (denoted by the "F" in the model number).

Port Configuration:

• 32 x 100GbE QSFP28 ports:
  • Each QSFP28 port can support 100GbE, 40GbE, or breakout configurations such as 4x25GbE or 4x10GbE for flexibility.
• 4 x 400GbE QSFP-DD ports:
  • Each port can support 400GbE or be broken out into smaller port speeds, such as 4 x 100GbE, providing future-proofing for growing bandwidth demands.

Performance:

• Switching Capacity: 12.8 Tbps (Terabits per second).
• Forwarding Rate: 5.7 Bpps (Billion packets per second).
• Latency: Ultra-low latency, suitable for environments requiring fast and consistent network performance.

Buffering:

• Packet Buffer Memory: 64 MB dynamically allocated per port group, designed to handle traffic bursts and ensure smooth performance in congested environments.

Layer 2 and Layer 3 Features:

• Layer 2:

  • Supports VLANs, including 802.1Q VLAN tagging.
  • Link Aggregation (LACP) with up to 64 ports per group.
  • Spanning Tree Protocol (STP, RSTP, MSTP).
  • Jumbo Frames up to 9216 bytes.

• Layer 3:

  • Supports advanced IPv4 and IPv6 routing, including OSPF, BGP, IS-IS, and RIP.
  • VRF (Virtual Routing and Forwarding) for Layer 3 virtualization.
  • Equal-Cost Multi-Path (ECMP) routing with up to 128-way paths for load balancing.

Advanced Features:

• VXLAN: Hardware-based VXLAN support for scalable Layer 2 network virtualization over Layer 3.
• Quality of Service (QoS):
  • Supports up to 8 egress queues per port.
  • Provides flexible traffic prioritization, policing, and shaping.
• Security:
  • Access Control Lists (ACLs) for filtering traffic at Layers 2-4.
  • Control Plane Policing (CoPP) to protect the control plane.
  • MACsec (802.1AE) encryption for secure data transmission on selected interfaces.

Telemetry and Monitoring:

• Arista Latency Analyzer (LANZ) for real-time network performance analysis.
• sFlow and Streaming Telemetry support for detailed traffic monitoring and analysis.

Management and Automation:

• Operating System: Runs Arista’s Extensible Operating System (EOS), which provides advanced programmability, real-time network monitoring, and automation capabilities.
  • eAPI (Extensible API): Supports automation through REST APIs.
  • CloudVision: Integrates with Arista's CloudVision for network-wide automation, visibility, and telemetry.
  • Zero Touch Provisioning (ZTP) for automated deployment.

Power and Environmental:

• Power Supplies: Dual, hot-swappable, redundant power supplies (AC or DC).
• Typical Power Consumption: Approximately 500W (varies based on configuration and traffic).
• Cooling: Hot-swappable fan trays with front-to-back airflow.

Physical Dimensions:

• Dimensions: 1.75 inches (4.45 cm) height x 19 inches (48.26 cm) width x 18 inches (45.72 cm) depth.
• Weight: Approximately 26.2 lbs (11.9 kg).

Use Cases:

• Data Center Spine/Leaf Architectures: Ideal for deployment in high-performance, scalable data center topologies.
• Enterprise Core and Aggregation: Suitable for large-scale enterprises needing high-density, low-latency switching with advanced routing capabilities.
• Cloud and Virtualization Environments: VXLAN and other overlay technologies make it an excellent fit for cloud data centers.

Key Features:

• High-density 100GbE and 400GbE ports: Supports flexible configurations for cloud and enterprise data centers.
• Advanced Layer 2 and Layer 3 routing: Provides a full suite of features for high-performance routing and switching.
• Low latency: Designed for latency-sensitive applications such as high-frequency trading (HFT) and real-time data analytics.