Cisco sinks on report Amazon wading into networking equipmentCisco's shares were down 5 percent, wiping off nearly $11 billion from its market capitalisation. Shares of Juniper Networks Inc and Arista Networks Inc fell 4 percent as investors feared that Amazon's scale and pricing power could disrupt the sector. The report comes days after Amazon sent shockwaves across the drug retailing sector with its move to buy small online pharmacy PillPack.