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Arista

Arista DCS-7280CR3K-36S-F | 7280R3 36-Port 100G Switch, 2x 400G, 2.4 Tbps

SKU:DCS-7280CR3K-36S-F

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Description

The Arista DCS-7280CR3K-36S-F is a high-performance 1RU data center switch router from the 7280R3 Series, delivering 2.4 Tbps non-blocking throughput with 36x 100GbE QSFP ports and 2x 400GbE uplinks. Built with FlexRoute technology supporting up to 5 million IPv4 routes and 4GB deep packet buffer, this switch router is optimized for cloud data centers, content delivery networks, and service provider environments requiring advanced Layer 2/3 routing, EVPN-VXLAN overlay networking, and internet-scale routing capabilities. The front-to-rear airflow design and dual redundant AC power supplies ensure reliable operation in hot aisle/cold aisle data center configurations.

Features

Deep Packet Buffer: 4GB VOQ architecture eliminates head-of-line blocking for lossless forwarding in storage and high-performance computing environments
- FlexRoute Technology: Supports up to 5 million IPv4 routes with flexible forwarding profiles for internet peering and service provider applications
- Layer 2 Features: IEEE 802.1Q VLANs (4,000), RSTP/MSTP, LACP link aggregation, MLAG multi-chassis LAG, jumbo frames up to 9,216 bytes
- Layer 3 Routing: BGP, OSPF, IS-IS, static routing, ECMP (512-way), policy-based routing, VRF-lite, BFD for fast failure detection
- MPLS and Segment Routing: LDP, RSVP-TE with FRR, Segment Routing (SR-MPLS), BGP labeled unicast, L3VPN, VPLS support
- EVPN-VXLAN: Full EVPN control plane for Layer 2/3 overlay networking, VXLAN routing and bridging, distributed anycast gateway
- Quality of Service: 8 queues per port, strict priority and WRR scheduling, ingress policing, egress shaping, DSCP/CoS remarking
- Security: Algorithmic ACLs for scalable access control, control plane policing, MACsec support (on M-variants), SSH, TACACS+, RADIUS
- High Availability: Dual redundant hot-swappable power supplies and fans, hitless software upgrades, stateful switchover, configuration rollback
- Telemetry and Monitoring: LANZ (latency monitoring), accelerated sFlow, DANZ precision data analyzer, streaming telemetry, gRPC
- Network Virtualization: VXLAN encapsulation/decapsulation, EVPN for multi-tenancy, VRF support for traffic isolation
- Precision Timing: PTP (IEEE 1588v2) boundary and transparent clock, SyncE for frequency synchronization

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: 36x 100GbE QSFP28 ports, 2x 400GbE uplink ports
- Switching Capacity: 2.4 Tbps wire-speed performance
- Forwarding Rate: 1.2 Bpps (billion packets per second)
- Packet Buffer: 4GB deep packet buffer with Virtual Output Queue (VOQ) architecture
- Routing Scale: FlexRoute engine supports up to 5 million IPv4 routes (CR3K variant)
- MAC Address Table: Up to 736,000 MAC addresses
- Latency: Ultra-low latency starting from 3.8 microseconds (store-and-forward)
- Memory: 64GB DRAM standard, 120GB SSD storage
- Form Factor: 1RU fixed configuration switch router
- Airflow: Front-to-rear airflow (-F suffix)
- Power Supply: Dual redundant hot-swappable AC power supplies (2x 2400W), over 94% efficient
- Management: Arista EOS with CLI, web GUI, REST API, NETCONF, CloudVision integration
- Certifications: Standards-compliant with IEEE Ethernet, Layer 2/3 protocols

FAQs

Q: What is the difference between the CR3K and standard CR3 models?
A: The CR3K variant includes enhanced FlexRoute capabilities supporting over 5 million IPv4 routes for internet-scale routing applications, compared to standard forwarding tables in CR3 models. The K-variant also includes 64GB DRAM and 120GB SSD as standard, making it ideal for internet peering and service provider edge deployments.

Q: Can the 100GbE QSFP ports support lower speed breakouts?
A: Yes, the QSFP ports support flexible breakout configurations including 1G, 10G, 25G, 40G, 50G, and 100G speeds, allowing deployment versatility and investment protection as network requirements evolve.

Q: What routing protocols and overlay technologies are supported?
A: The switch supports comprehensive Layer 3 routing protocols including BGP, OSPF, IS-IS, MPLS (LDP, RSVP-TE), Segment Routing, and EVPN-VXLAN for overlay networking. It also supports advanced features like 512-way ECMP, PIM for multicast, and MLAG for Layer 2 redundancy.

Q: Is this switch suitable for spine or leaf deployment?
A: The DCS-7280CR3K-36S-F is designed as a universal spine/leaf platform with deep buffers ideal for spine deployments in leaf-spine architectures. The large routing table capacity and 400GbE uplinks make it well-suited for spine roles in modern data center fabrics.

Q: What automation and programmability features does Arista EOS provide?
A: Arista EOS provides Zero Touch Provisioning (ZTP), CloudVision integration for network-wide automation, REST API and NETCONF for programmability, event-driven automation, and native Linux access for custom scripting. The operating system supports in-service software updates and stateful fault repair for maximum uptime.

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