Arista DCS-7280R4K-64QC-10PE-R | 7280R4 64-Port 100G + 10-Port 800G Switch, 25.6Tbps

Q: What is the difference between the 7280R4 and 7280R4K models?
A: The 7280R4K variant adds large routing table support scaling to over 5 million routes, line-rate encryption with TunnelSec on all ports, and enhanced policy capabilities with Algorithmic ACLs. The standard 7280R4 does not include these advanced encryption and routing features.

Q: What deployment scenarios is the DCS-7280R4K-64QC-10PE-R best suited for?
A: This model is optimized for AI/ML leaf deployments requiring high-density 100G server connectivity with 800G uplinks, data center spine networks, internet peering, service provider backbones, data center interconnect, and content delivery networks. The deep buffers and VOQ architecture make it ideal for lossless AI training and congestion-sensitive workloads.

Q: Does this switch support breakout configurations?
A: Yes, the 100GbE QSFP ports support breakout to 4x25GbE or 4x10GbE. The 800GbE OSFP ports can operate at 800G, 400G, 200G, 100G, or 50G speeds. This flexibility allows deployment with a wide range of interface speeds from 10G to 800G.

Q: What encryption capabilities are included?
A: The 7280R4K model includes Arista TunnelSec technology providing line-rate AES-256-GCM encryption on all QSFP and OSFP ports simultaneously. Supported protocols include MACsec for layer 2 link encryption, IPsec for layer 3 tunnels, and VXLANsec for overlay encryption. Encryption services require an EOS license file to enable.

Q: Is this switch compatible with 400G/800G ZR coherent optics?
A: Yes, the 7280R4 platform is optimized for high-power 400G and 800G ZR/ZR+ OSFP and QSFP-DD coherent optical modules. It supports DWDM deployments with reaches up to 120km and is compatible with Arista's ZR Line System for multiplexing multiple 800ZR channels over single fiber pairs.