https://www.theregister.co.uk/2018/07/24/juniper_400gbps/

The next round of bonkers-fast upgrades to data center networks is going to be 400Gbps Ethernet – and Juniper Networks has joined the party with a suitable roadmap.

This year has been something of a Year Of 400 Gbps Announcements, with Arista saying in February it expects trial deployments of its 400Gbps kit to start next year, and both Mellanox and Marvell Semiconductor are pushing ahead on silicon.