Cisco's shares previously fell about 3% after a report said Amazon planned to sell a competing product at a cheaper price.
Arista faces new competition from makers of white-box switches, while its main rival Cisco becomes more aggressive on equipment pricing.
Analysts expect the stock to gain another 25% on tax benefits and strong end markets.
E*TRADE highlighted Arista Networks stock as a way to get into the cloud computing market.
Analysts see the networking company as positioned to outperform on new router products—sorry, Cisco.
Analysts initiate coverage on the tech stocks at buy, expecting ANET to gain another 20%.
Analysts highlight the networking company's time-to-market advantage. So, a 19% share by 2020?
Cisco stock moved lower after hours, and traders will be watching the lower end of its price channel.
The cloud-based networking vendor wins the latest patent battle, but the coast is not yet clear.
Ongoing litigation with Cisco weighs against strong earnings results from a cloud-based rival.