Intense Competition: Arista faces significant competition from established players like Cisco, Juniper, and Hewlett Packard Enterprise, as well as emerging threats from hyperscale cloud providers developing their own networking solutions, potentially impacting market share and pricing power.

Customer Concentration Risk: A substantial portion of Arista's revenue is derived from a limited number of large cloud service providers, making it vulnerable to changes in their spending patterns, technology choices, or competitive dynamics.

Supply Chain Disruptions: Reliance on third-party manufacturers and a global network of component suppliers exposes Arista to risks such as material shortages, geopolitical tensions, logistics challenges, or increased component costs that could delay product delivery and reduce profitability.