Maximizing Network Efficiency with Arista at AI Field Day 5
About Hugh Holbrook
Hugh Holbrook, Chief Development Officer of Software Engineering at Arista Networks, discussed packet-level load balancing at AI Field Day 5 in October 2024. He described a technique where traffic is distributed across all available links at the packet level rather than the flow level, which he said allows total network utilization to reach 100% by avoiding uneven link utilization. Holbrook characterized the approach as "spread peanut buttering" traffic across links. In a 2018 presentation, Holbrook introduced the Arista 7170 Series programmable platform, which uses Barefoot Networks' Tofino switch chip. He stated that the platform allows functions such as tunnel termination, traffic filtering, network address translation, and deep packet inspection to be moved into the switch, capabilities that previously required dedicated smart NICs or host processing. Holbrook said the P4 programming language enables engineers to specify forwarding behavior that runs at line rate, and that programmability allows Arista to modify network behavior more quickly in response to customer needs.