Arista ACE Specialist - WAN Routing case studies
Arista ACE Specialist - WAN Routing · Put your knowledge to work in context.
The Arista ACE Specialist - WAN Routing credential is an independent study resource for network engineers who design, deploy, and operate wide-area and software-defined WAN environments built on Arista platforms. It is aimed at engineers with hands-on routing experience who want to validate depth in WAN architecture rather than general data center switching: enterprise WAN planners, service provider edge engineers, and SD-WAN operations staff preparing for design or escalation roles. The exam is organized into four equally weighted domains, each contributing 25 percent of the blueprint: WAN and SD-WAN Architecture; Routing Protocols and Path Selection; SD-WAN Overlay, Policy and Traffic Steering; and Operations, Observability and Troubleshooting. Questions are multiple choice and stress applied reasoning - choosing an overlay or path-selection approach for a stated requirement, interpreting routing behavior, or diagnosing a policy outcome - rather than recall of marketing terminology. The Arista ACE Specialist - WAN Routing case studies are 5 cases and about 3,032 words.
1Hub-and-Spoke Sizing for a New Retail WAN
A retailer is replacing 140 MPLS-connected stores with an SD-WAN overlay. Each store runs a 200 Mbps fiber primary and an LTE backup at 40 Mbps.
651 words, about 3 min2BGP Path Selection Across Mixed Transports
A financial services firm runs an SD-WAN overlay over three underlays: MPLS (20 Mbps, 15ms RTT), business broadband (500 Mbps, 30ms RTT), and 5G (300 Mbps, 40ms RTT, variable). The overlay runs eBGP between edges and a regional route reflector.
671 words, about 3 min3Overlay Tunnel Scale and Encryption Overhead
A manufacturer is deploying SD-WAN across 60 factories, each with two WAN links (fiber + cable), plus two data centers and one cloud on-ramp. The design calls for a full-mesh overlay among all sites for direct site-to-site traffic.
565 words, about 3 min4Steering Voice Away from a Degrading Path
A contact center runs 800 voice agents across 12 sites. Voice is carried over the SD-WAN overlay to a cloud contact-center platform.
604 words, about 3 min5Silent Packet Loss in a Dual-Underlay Overlay
Users at a branch report intermittent application timeouts (5–10 seconds) every few minutes. The branch has fiber and LTE underlays in an active/active overlay with per-packet load balancing enabled.
541 words, about 3 min