DEVICE DESCRIPTION
The Arista 7700R4 Distributed Etherlink Switch™ (DES) is an ultra-scalable, smart distributed system that builds on the foundations of the 7800R4 to deliver over 27,000 800GbE ports and Petabits per second of capacity combined with the perfect fairness and lossless packet delivery - imperative for supporting largest scale AI and ML applications built on any flavor of XPU.
The Ultra Ethernet ready DES is optimized to support the needs of all leading edge, large scale accelerated compute clusters which depend on a non-congested, non-blocking interconnect between accelerators for the efficient execution of thousands of simultaneous high bandwidth transactions. Congestion, packet loss and failure can dramatically reduce the efficiency of a workload or potentially lead to a stall in processing, all of which reduce the useful working time and return on investment (ROI) of high value compute farms.
The unique scalability and fully coordinated logical single-hop behavior is made possible by an automated and fully hardware accelerated architectural framework that implements massively parallel distributed end-to-end scheduling combined with deterministic traffic spraying across all available leaf-spine interfaces to deliver 100% efficient path utilization and equality to all traffic flows with no tuning required - critical attributes for supporting both single large workloads as well as mixed multi-tenant and multi-generational jobs in parallel.
Advanced Arista Etherlink® features for large scale accelerated compute clusters introduce workload visibility and telemetry along with advanced load balancing and congestion control optimized for RDMA workloads. Full support for DCQCN, PFC, ECN and Cluster Load Balancing, with forwards compatibility with Ultra Ethernet, is layered on top of the rich feature set provided by Arista's EOS.