• Gray metal arista dcs-7500r3-24d-lc server rack back with multiple 400g qsfp-dd ports and ventilation slots
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Arista

Arista DCS-7500R3-24P-LC | 7500R3 24-Port 400G OSFP Line Card Module

DCS-7500R3-24P-LC

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Description

The Arista DCS-7500R3-24P-LC is a high-performance 24-port 400GbE OSFP line card designed for the 7500R3 Series modular data center switches. Delivering wire-speed, non-blocking forwarding with FlexRoute scalability for internet-scale routing, this module supports flexible port breakout modes including 4x100G and 2x200G per port. Ideal for universal spine deployments, cloud networks, and MPLS peering environments requiring massive throughput and low latency.

Features

24x 400GbE OSFP ports with wire-speed, non-blocking architecture
- Flexible port breakout: 4x100G, 2x200G, and multi-rate 25G/50G support
- FlexRoute engine for internet-scale routing with millions of routes
- Distributed packet processor with linear scaling
- Virtual Output Queuing (VoQ) for lossless forwarding and zero head-of-line blocking
- Deep packet buffers up to 16GB per line card
- Algorithmic ACLs with flexible high-scale pattern matching
- Accelerated sFlow for hardware-based flow sampling at wire speed
- MPLS support: LDP, RSVP-TE, Segment Routing, MPLS over GRE
- EVPN and VXLAN for network virtualization and overlay networks
- Layer 2: MLAG, VLANs, STP, LACP, 802.1Q
- Layer 3: BGP, OSPF, IS-IS, static routing, ECMP/UCMP, BFD
- Comprehensive QoS: classification, policing, hierarchical QoS, shaping
- Precision timing support (PTP/IEEE 1588)
- Hot-swappable with zero downtime during replacement
- Backward and forward compatibility with 7500R Series chassis and fabric modules
- Arista EOS integration with CloudVision for network-wide automation
- MACsec encryption support (when combined with compatible transceivers)
- Advanced telemetry: LANZ (Latency Analyzer), DANZ (Precision Data Analyzer), NetDB
- Hitless software upgrades and self-healing resiliency

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

24x 400GbE OSFP ports, wire-speed, non-blocking
- Port breakout: supports 4x100G, 2x200G, and flexible 25G/50G modes per port
- System capacity: up to 230 Tbps (with full 7500R3 chassis)
- Fabric bandwidth per slot: 19.2 Tbps full-duplex (6 fabric modules active)
- Distributed packet processing with Virtual Output Queuing (VoQ) architecture
- FlexRoute engine: supports millions of IPv4/IPv6 routes with low power draw
- Deep packet buffering: up to 16GB per line card
- Advanced features: Algorithmic ACLs, Accelerated sFlow, MPLS, Segment Routing, EVPN, VXLAN
- Power consumption: 538W typical / 558W maximum
- Hot-swappable line card for DCS-7504N, DCS-7508N, DCS-7512N chassis
- Compatible with Arista EOS operating system
- Layer 2 and Layer 3 forwarding, MLAG, ECMP routing
- Management: CLI, SNMP, NetDB, CloudVision integration

FAQs

Q: What chassis models are compatible with the DCS-7500R3-24P-LC?
A: This line card is compatible with Arista 7500N Series chassis including DCS-7504N (4-slot), DCS-7508N (8-slot), and DCS-7512N (12-slot) modular switches. It requires compatible 7500R3 fabric modules and supervisors for operation.

Q: Can the 400G OSFP ports be broken out into lower-speed interfaces?
A: Yes, each 400G OSFP port supports flexible breakout modes including 4x100G, 2x200G, and individual 25G or 50G speeds, providing maximum deployment flexibility for mixed-speed data center environments.

Q: What is FlexRoute and why is it important for this line card?
A: FlexRoute is Arista's patented forwarding engine that enables internet-scale routing with millions of IPv4 and IPv6 routes in hardware, far exceeding native merchant silicon capabilities. This makes the 7500R3 ideal for internet peering, MPLS, and large-scale cloud deployments.

Q: Is this line card sold as a spare or does it ship installed in a chassis?
A: The SKU DCS-7500R3-24P-LC is the spare version that ships separately for field installation. The variant DCS-7500R3-24P-LC# ships pre-installed in a chassis bundle. Both are functionally identical.

Q: What routing and tunneling protocols are supported?
A: The line card supports comprehensive Layer 3 protocols including BGP, OSPF, IS-IS, MPLS (LDP, RSVP, Segment Routing), IPv4/IPv6 VPNs, EVPN, VXLAN, GRE, and Pseudowires, making it suitable for service provider and enterprise data center applications.

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