Aug 4 (Reuters) - Arista Networks forecast third-quarter revenue above Wall Street ‌estimates on Tuesday, betting on strong ‌demand for its networking gear as companies ​expand their AI infrastructure. The company has been expanding beyond its core cloud customer base into enterprise campus and branch ‌networking to ⁠diversify its revenue. Here are some details:• Shares were up 3% ⁠after the bell. • Arista, which makes the high-speed computer networking equipment that ​powers big ​data centers for ​customers like Microsoft ‌and Amazon, forecast third-quarter revenue of $3.3 billion, above analysts' average estimate of $2.94 billion, according to LSEG data. (Reporting by ​Nithyashree R B in Bengaluru; Editing ​by Sriraj Kalluvila)