Arista 7800R3 Series 400G Spine Line Card

The Arista 7800R3-48D2-LC is a high-density 400G spine line card designed for deployment within the Arista 7800R3 Series modular chassis. It delivers 48 ports of native QSFP-DD 400GbE connectivity alongside 2 ports of 400G OSFP, enabling non-blocking fabric capacity at massive scale. Built on Arista's third-generation routing silicon, the card supports full Layer 2 and Layer 3 feature parity including BGP, EVPN, VXLAN, and segment routing, making it a foundational building block for large-scale data center spine and cloud interconnect fabrics.

The 7800R3-48D2-LC integrates deeply with Arista EOS (Extensible Operating System), providing a consistent, programmable operating environment across the entire modular chassis. EOS enables streaming telemetry via gNMI and OpenConfig, zero-touch provisioning, and robust automation through open APIs. The card supports hardware-based timestamping and advanced traffic engineering capabilities suited to latency-sensitive workloads, financial trading backbones, and multi-tenant cloud environments.

Targeted at hyperscale enterprise networks and cloud service provider backbones, this line card slots into the Arista 7804, 7808, and 7816 chassis variants to deliver scalable, high-availability spine switching. Its support for MACsec encryption at line rate, hitless software upgrades, and non-stop forwarding with stateful switchover (NSF/SSO) ensures operational continuity for mission-critical infrastructure that cannot tolerate unplanned downtime.

Ideal for

• Large-scale data center spine fabric requiring non-blocking 400GbE switching capacity across hundreds of server and storage endpoints
• Cloud backbone interconnect where high port density and EVPN/VXLAN support enable scalable multi-tenant overlay network architectures
• Financial services trading infrastructure demanding low-latency forwarding, hardware timestamping, and deterministic traffic engineering
• Enterprise campus core aggregation upgrades migrating from 100G to 400G to support AI/ML cluster east-west traffic growth
• Carrier and managed service provider peering fabrics leveraging BGP and segment routing for flexible traffic steering and fast convergence
• High-performance computing (HPC) environments requiring consistent low-latency, lossless fabric behavior across dense compute nodes

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.