• Gray metal arista dcs-7280cr3k-32p4a-r network switch with multiple ports and ventilation slots front view
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Arista

Arista DCS-7280CR3K-32P4A-R | 7280R3 32x100G + 4x400G Switch, 4.8Tbps, FlexRoute

DCS-7280CR3K-32P4A-R

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Description

The Arista DCS-7280CR3K-32P4A-R is a high-performance 1RU data centre switch router delivering 4.8 Tbps of non-blocking throughput with 32x 100GbE QSFP28 ports and 4x 400GbE OSFP ports. Built on a deep buffer VOQ architecture with 8GB packet buffer memory and 64GB system memory, this K-variant provides large-scale routing with support for over 5 million IPv4 routes. Ideal for spine, aggregation, DCI, and internet peering roles, featuring rear-to-front airflow for hot-aisle deployments.

Features

Full Layer 2 and Layer 3 switch router functionality
- FlexRoute support: Over 5M IPv4 routes, over 5M IPv6 routes, 384K MAC addresses
- Advanced routing protocols: BGP, OSPF, IS-IS with extensive policy controls
- MPLS support: LDP, RSVP-TE, BGP Label Unicast (LU)
- Segment Routing: SR-MPLS and SR-TE for traffic engineering
- EVPN and VXLAN for network virtualization and overlay networks
- 512-way Equal-Cost Multi-Path (ECMP) routing
- 8GB VOQ deep packet buffer with head-of-line blocking elimination
- Algorithmic ACLs supporting over 100,000 rules
- IEEE 1588v2 PTP and SyncE for precision timing
- MACsec encryption support on all ports
- Arista EOS modular operating system with in-service software upgrades
- CloudVision integration for centralized management and telemetry
- Zero-Touch Provisioning (ZTP) for automated deployment
- Advanced telemetry: LANZ, sFlow, DANZ, IPFIX, and Ethernet OAM
- Redundant hot-swappable power supplies and fans

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: 32x 100GbE QSFP28, 4x 400GbE OSFP
- Maximum Interfaces: Up to 96 with breakout support (50G, 40G, 25G, 10G)
- Switching Capacity: 4.8 Tbps full-duplex (9.6 Tbps aggregate)
- Forwarding Rate: 2 Billion packets per second
- Latency: 3.8 microseconds store-and-forward
- Packet Buffer: 8GB VOQ deep buffer memory
- System Memory: 64GB DRAM
- Storage: 120GB SSD
- CPU: Quad-core x86 processor
- FlexRoute Scale (K-variant): Over 5M IPv4 unicast routes, over 5M IPv6 routes, 384K MAC addresses
- Management: 1x 10/100/1000 Ethernet, 1x RS-232 serial console, 1x USB
- Airflow: Rear-to-front (fan side to port side)
- Power Supply: Dual AC power supplies included
- Form Factor: 1RU (48.3 x 4.4 x 55.8 cm), 12.3 kg
- Operating Temperature: 0°C to 40°C
- Software: Arista EOS with CloudVision support

FAQs

Q: What is the difference between the DCS-7280CR3K-32P4A-R and DCS-7280CR3K-32P4A-F?
A: The -R suffix indicates rear-to-front airflow (fan side to port side), suitable for hot-aisle containment, while the -F version has front-to-rear airflow (port side to fan side) for cold-aisle deployments. All other specifications are identical.

Q: What routing protocols and features does this switch support?
A: The 7280CR3K-32P4A-R provides full Layer 3 capabilities including BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP LU), Segment Routing (SR-TE), EVPN, VXLAN, and 512-way ECMP. The K-variant FlexRoute delivers massive routing scale with support for over 5 million IPv4 and IPv6 routes.

Q: Can the QSFP28 and OSFP ports support lower speeds?
A: Yes, the 32x QSFP28 ports support 100G, 50G, 40G (with QSFP+ optics), 25G, and 10G with appropriate transceivers and breakout cables. The 4x OSFP ports support 400G, 200G, and 100G line rates, providing flexible migration paths.

Q: What makes the deep buffer architecture beneficial for data centre deployments?
A: The 8GB VOQ (Virtual Output Queue) deep buffer eliminates head-of-line blocking and handles bursty traffic, TCP incast, and transient congestion without packet drops. This is critical for spine/aggregation roles, IP storage, DCI, and peering applications where large bursts occur.

Q: Is the Arista DCS-7280CR3K-32P4A-R suitable for internet peering and DCI roles?
A: Absolutely. The K-variant's FlexRoute capability supports over 5 million IPv4 routes, making it ideal for full internet routing tables. Combined with advanced MPLS, BGP, and Segment Routing features, plus the high-speed 400G uplinks, it excels in peering, inter-DC connectivity, and service provider edge deployments.

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