Cisco said its earnings rose 18 percent in the latest quarter, propelled by a renewed willingness by large U.S. businesses to invest in big-ticket networking gear, even as the federal government continued to hold back. Orders from large business customers in the U.S. rose 9 percent from a year ago.

The company's stock rose $1.11, or 6.6 percent, to $17.96 in extended trading Tuesday.

Cisco made $2.1 billion, or 39 cents per share, in its fiscal first quarter, which ended Oct. 27. That compares with $1.8 billion, or 33 cents per share, in the same period a year ago.

Excluding the cost of stock-based compensation and certain other items, Cisco would have earned 48 cents per share. On that basis, Cisco's earnings were 2 cents above the average analyst estimate, according to FactSet.

Revenue rose 5.5 percent to $11.9 billion, beating Wall Street estimates. Excluding the acquisition of video technology company NDS, which closed just before the end of the quarter, revenue would have risen 4 percent.

The San Jose, California, company forecast earnings for the current quarter of 47 cents to 48 cents per share. Analysts have been expecting 48 cents per share. The company projected revenue of $11.9 billion to $12.1 billion, bracketing the average analyst estimate.