The worldwide Ethernet switch market (Layer 2/3) recorded $6.9 billion in revenue in the fourth quarter of 2017 (4Q17), an increase of 3.2% year over year, according to IDC’s newly updated Worldwide Quarterly Ethernet Switch Tracker and Worldwide Quarterly Router Tracker, and reached more than $25.7 billion in revenue for the full year 2017, an increase of 5.4% over 2016.
IDC calculates that the worldwide total enterprise and service provider (SP) router market recorded just under $4.0 billion in revenue in 4Q17, increasing 2.4% on a year-over-year basis. For the full year 2017, the router market finished at $15.2 billion, an increase of 4.0% over 2016.

IDC notes that 100Gb Ethernet switch revenue continues to grow rapidly as adoption by hyperscale cloud providers and large enterprises accelerates.
Some highlights:
- 100Gb shipments reached more than 1.3 million ports and $661 million in revenue in 4Q17.
- 100Gb now accounts for 9.6% of total market revenue, up from just 4.8% in the same quarter a year ago.
- 25Gb/50Gb Ethernet switch products continue to gain traction. Shipments exceeded 1 million ports with $124 million in revenue in 4Q17.
- Growth in 25Gb, 50Gb, 100Gb continue to negatively impact the 40Gb segment. 40Gb port shipments decreased 6.9% year over year and revenue was down 11.2% for all of 2017.
- The 10Gb market continues to see healthy growth but pricing pressure is holding back revenue increases.
- 10Gb shipments in 4Q17 grew 37.2% year over year while revenues decreased 2.7%. Meanwhile, 1Gb remains the primary connectivity technology for enterprise campus and branch deployments, driving 1Gb port shipments to 112.6 million in 4Q17, growing 5.4% year over year with market share remaining steady at 66.7% of all ports shipped.