** Shares of cloud networking firm Arista Networks ANET.N jump 12.5% to $132.84 premarket
** Co forecast Q3 revenue at $2.25 bln, above analysts' estimates of $2.11 bln - data compiled by LSEG
** Q2 revenue, profit beats expectations
** Increased AI spending driving demand for co's ethernet switches and routers, widely deployed in data centers
** J.P.Morgan raises PT on stock to $150 from $130; new PT close to 27% premium to last close
** J.P.Morgan says most demand drivers in relation to AI infrastructure deployment will continue; sees additional revenue opportunities in 2027
** Average rating of 27 analysts is a "buy", median PT at $120 - LSEG
** Stock up about 7% YTD, till last close
(Reporting by Purvi Agarwal in Bengaluru)
((Purvi.Agarwal@thomsonreuters.com;))