• Gray metal arista dcs-7280cr3k-32p4 network switch with 32 100g ports and ventilation slots visible on front side
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Arista

Arista DCS-7280CR3K-32P4 | 7280R3 32-Port 100G Switch, 4x 400G OSFP, 8GB Buffer

DCS-7280CR3K-32P4

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Description

The Arista DCS-7280CR3K-32P4 is a high-performance 1RU data center switch router delivering 4.8 Tbps non-blocking throughput with 32x 100GbE QSFP28 ports and 4x 400GbE OSFP uplinks. Built on a deep buffer VOQ architecture with 8GB packet buffer memory, this K-variant supports over 5 million IPv4 routes via FlexRoute engine, making it ideal for cloud data centers, service provider networks, IP peering, and data center interconnect applications. Powered by Arista EOS with CloudVision integration, advanced telemetry, and comprehensive Layer 2/3 routing capabilities.

Features

Full Layer 2/3 switch router with BGP, OSPF, IS-IS, and 512-way ECMP support
- MPLS support including LDP, RSVP-TE, and BGP Label Unicast
- Segment Routing Traffic Engineering (SR-TE) for optimized path control
- EVPN and VXLAN overlay network virtualization
- VOQ (Virtual Output Queue) architecture eliminates head-of-line blocking
- 8GB deep packet buffer for lossless forwarding and burst absorption
- FlexRoute engine with over 5 million IPv4/IPv6 routes for internet-scale routing
- Algorithmic ACLs enabling flexible high-scale access controls with 100K+ rules
- Accelerated sFlow with hardware-assisted sampling at full line rate
- LANZ (Latency Analyzer) for real-time congestion monitoring
- DANZ (Data Analyzer) for advanced traffic mirroring and telemetry
- IEEE 1588v2 PTP and SyncE for precision timing in 5G and carrier environments
- CloudVision integration for centralized network-wide automation and telemetry
- Zero-Touch Provisioning (ZTP) for rapid deployment
- Arista EOS modular architecture with in-service software updates
- Multi-Chassis Link Aggregation (MLAG) for active-active L2 topologies
- Hot-swappable redundant power supplies and fan trays for high availability
- Python and Bash scripting, OpenConfig, gNMI streaming telemetry support
- Advanced Event Management (AEM) for programmable event-driven automation
- Energy-efficient design with flexible front-to-rear or rear-to-front airflow options

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 with breakout support to 50GbE, 40GbE, 25GbE, and 10GbE (up to 96 interfaces)
- 4x 400GbE OSFP ports supporting 400G, 200G, and 100G line rates
- Switching capacity: 4.8 Tbps non-blocking, 2 Bpps forwarding rate
- 8GB deep packet buffer with VOQ architecture for lossless forwarding
- Latency: 3.8 microseconds store-and-forward
- FlexRoute K-variant: Over 5M IPv4 unicast routes, over 5M IPv6 routes, 384K MAC addresses
- Algorithmic ACLs supporting 100K+ rules
- Quad-core x86 CPU with 64GB DRAM and 120GB SSD storage
- Arista EOS operating system with CloudVision integration
- IEEE 1588v2 PTP and SyncE precision timing support
- Hot-swappable dual redundant power supplies (1+1) and N+1 fan trays
- Power consumption: 535W typical, 851W maximum
- Dimensions: 48.3 x 4.4 x 55.8 cm (19 x 1.75 x 22.0 inches), 1RU
- Weight: 12.3 kg (27.0 lbs)
- Configurable airflow options (available in -F front-to-rear and -R rear-to-front variants)

FAQs

Q: What is the difference between the CR3K and standard CR3 variants?
A: The CR3K variant features FlexRoute with large routing table capacity supporting over 5 million IPv4 routes and 5 million IPv6 routes, compared to standard variants. It includes 64GB DRAM and 120GB SSD as standard, making it ideal for Internet peering and service provider applications requiring internet-scale routing.

Q: Can the 100GbE QSFP28 ports be broken out to lower speeds?
A: Yes, the 32x 100GbE QSFP28 ports support flexible breakout configurations to 50GbE, 40GbE, 25GbE, and 10GbE speeds, enabling up to 96 total interfaces. This provides deployment flexibility for mixed-speed environments and gradual migration paths.

Q: What routing protocols does the DCS-7280CR3K-32P4 support?
A: The switch supports comprehensive Layer 2/3 routing including BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE, BGP LU), Segment Routing (SR-TE), EVPN, VXLAN, and 512-way ECMP. It is designed for cloud data centers, DCI, and service provider networks requiring advanced routing capabilities.

Q: What is the purpose of the 8GB deep packet buffer?
A: The 8GB VOQ (Virtual Output Queue) deep buffer architecture handles transient congestion, TCP incast events, and bursty traffic patterns without triggering early packet drops. This provides lossless forwarding capabilities critical for storage networks, real-time applications, and high-performance computing environments.

Q: Does this model require licensing for advanced features?
A: The DCS-7280CR3K-32P4 ships with advanced routing capabilities built into Arista EOS. CloudVision management and telemetry features may require separate licensing depending on deployment requirements. Contact your Arista partner for specific licensing details.

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