The Associated Press report said net income was $2.2 billion for the three months ended October 27. That compares with $1.6 billion in profit in the year-ago period.
Cisco makes routers and switches that direct internet traffic.
The report said Cisco's strong sales in the first quarter helped it slightly beat analysts' forecasts. Cisco rang up $9.55 billion in sales during the period, a 17% jump over the $8.2 billion recorded last year.
Analysts were expecting $9.54 billion in sales.
Concerns about the company's ability to sustain its rapid growth continued to dog Cisco, however. Its stock fell $1.35, or more than 4%, to $31.40 after the results were reported, the report further said.