Ixia announced preliminary results for Q2 2011, saying it now expects total revenue to be in the range of $67.0 million to $69.0 million, below the company's previous guidance of $78.0 million to $82.0 million. Ixia attributed the weaker than expected Q2 results to lower than expected revenue from Asia Pacific and from certain large equipment makers, as well as orders received late in the quarter that could not be fulfilled in the second quarter. Revenue from Cisco Systems, Ixia's largest customer, and from service providers was in line with expectations.On...