Arista DCS-7800R4C-36PE-LC | 7800R4 36-Port 800GbE Line Card, AI-Optimized

Q: What chassis models is the DCS-7800R4C-36PE-LC compatible with?
A: This line card is compatible with all Arista 7800R4 Series modular chassis including the 7804R4, 7808R4, 7812R4, and 7816LR4 models. It requires compatible R4 fabric modules and supervisor modules to operate.

Q: What makes the R4C line cards different from standard R4 line cards?
A: The R4C line cards are specifically optimized for AI/ML and HPC cluster computing with a simplified, lower latency pipeline and improved energy efficiency. They maintain the same non-blocking, lossless VOQ architecture while delivering better performance for intensive accelerated computing workloads.

Q: Can the 800GbE ports be configured for lower speeds?
A: Yes, each 800GbE port supports wire-speed breakout to multiple lower speeds including 25G, 50G, 100G, 200G, and 400G interfaces. This provides exceptional flexibility for mixed-speed deployments and migration scenarios.

Q: What types of optics are supported on this line card?
A: The line card supports industry-standard OSFP form-factor optics including single-mode and multi-mode fiber transceivers, as well as copper direct-attach cables and active optical cables. For specific transceiver compatibility, consult Arista's transceiver datasheet and EOS release notes.

Q: Is this line card suitable for AI training networks?
A: Yes, the DCS-7800R4C-36PE-LC is purpose-built for AI/ML training networks and HPC clusters. It features an AI-optimized forwarding pipeline, lossless operation with Virtual Output Queuing, and deterministic performance under 100% load conditions—critical for minimizing job completion times in large-scale AI workloads.