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Arista

Arista DCS-7500R3K-48Y4D-LC | 7500R3 48-Port 25G Line Card, 4x 400G QSFP-DD

DCS-7500R3K-48Y4D-LC

Stock Status: Enquire

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Description

The Arista DCS-7500R3K-48Y4D-LC is a high-performance modular line card for the 7500R3 Series chassis, delivering 48 ports of 25GbE SFP28 and 4 ports of 400GbE QSFP-DD connectivity with wirespeed forwarding up to 2.8 Tbps. Designed for cloud-scale data centers and universal spine deployments, it features large route scale support exceeding 5 million routes with Arista FlexRoute technology, advanced routing protocols including BGP, OSPF and IS-IS, and deep packet buffers with virtual output queue architecture. Powered by Arista EOS, the line card enables comprehensive network automation, telemetry via sFlow and INT, and VXLAN/EVPN network virtualization for highly scalable Layer 2 and Layer 3 data center architectures.

Features

Wirespeed Layer 2 and Layer 3 forwarding with 2.8 Tbps throughput
- FlexRoute engine supporting over 5 million IP routes with hardware-based forwarding
- Deep buffer Virtual Output Queue (VOQ) architecture eliminating head-of-line blocking
- Advanced routing protocols: BGP, OSPF, IS-IS, MPLS, Segment Routing, EVPN
- Network virtualization with VXLAN, EVPN-VXLAN, EVPN-VPWS, and Layer 2/3 VPN services
- Algorithmic ACLs for flexible high-scale access control and policy-based forwarding
- Accelerated sFlow and IPFIX telemetry with no impact on packet forwarding performance
- Inband Network Telemetry (INT) for per-flow latency and congestion monitoring
- Comprehensive QoS with ingress policing, hierarchical QoS, weighted fair queuing, and shaping
- Flexible port breakout: QSFP-DD ports support 8x10G, 4x50G, 2x100G, 2x200G, 1x400G
- Hot-swappable design with full redundancy support (power, supervisors, fabrics)
- Backward compatible with 7500R and 7500R2 Series line cards in same chassis
- Advanced traffic scheduler for mixed real-time, multicast, and storage traffic
- Stateful failover and self-healing fault containment with Arista EOS
- CloudVision integration for network-wide automation and workload orchestration
- Precision timing support for high-performance computing and financial applications

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: 48x 25GbE SFP28 ports, 4x 400GbE QSFP-DD ports
- Port Speeds: 1/10/25G per SFP28 port; 8x10G to 1x400G per QSFP-DD port (breakout support)
- Switching Capacity: 2.8 Tbps wirespeed throughput
- Forwarding Rate: 1 Bpps (Billion packets per second)
- Routing Scale: Over 5 million IP routes with FlexRoute large route profile
- Packet Processor: Single Broadcom Jericho2C chipset
- Logical Interfaces: Maximum 80 active interfaces per module
- Packet Memory: Deep buffer Virtual Output Queue (VOQ) architecture
- Management: Arista EOS with CLI, REST API, NetDB, CloudVision support
- Chassis Compatibility: Arista 7500R3 Series (7504N, 7508N, 7512N) modular chassis
- Redundancy: Hot-swappable line card, redundant supervisors and fabric modules supported
- Interoperability: Compatible with 7500R, 7500R2, and 7500R3 Series line cards in same chassis
- Operating System: Arista Extensible Operating System (EOS)
- Cooling: Front-to-rear airflow design

FAQs

Q: What chassis models support the DCS-7500R3K-48Y4D-LC line card?
A: This line card is compatible with Arista 7500R3 Series modular chassis including the 7504N (4-slot), 7508N (8-slot), and 7512N (12-slot) models. It requires 7500R3 fabric modules and Supervisor-2 modules for operation. The chassis also supports backward compatibility with earlier 7500R and 7500R2 Series line cards.

Q: Can the 400G QSFP-DD ports be used in breakout mode?
A: Yes, each of the 4x QSFP-DD ports supports flexible breakout configurations ranging from 8x10G up to 1x400G per port, provided the installed transceiver supports the desired breakout mode. This allows for maximum deployment flexibility to match various data center connectivity requirements.

Q: What routing protocols and scale does the 7500R3K line card support?
A: The DCS-7500R3K-48Y4D-LC features Arista FlexRoute technology supporting large route tables with over 5 million IP routes, making it suitable for internet peering and service provider edge deployments. It supports advanced routing protocols including BGP, OSPF, IS-IS, MPLS with LDP and RSVP-TE, Segment Routing, and EVPN for Layer 2 and Layer 3 VPN services.

Q: Is this line card suitable for spine or leaf deployments?
A: This line card is primarily designed as a universal spine solution for large-scale data centers. The combination of high 25G port density and 400G uplinks makes it ideal for aggregation and spine roles supporting VXLAN overlays, ECMP routing, and multi-chassis link aggregation (MLAG) in modern leaf-spine architectures.

Q: What advanced telemetry and monitoring features are available?
A: The line card supports accelerated sFlow sampling at full forwarding capacity across all 25G and 400G interfaces, plus Inband Network Telemetry (INT) for per-flow monitoring of latency, drops, and congestion. Algorithmic ACLs provide flexible high-scale access control and policy-based forwarding with comprehensive per-flow counters for real-time troubleshooting.

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