Practical testing at 400GE. Although its a vendor press release, not the first or last 400G testing we will see in the next few months I think.
Huawei backbone routers were used in the test, and 400GE port networking was used between devices and the tester. Under real-world network traffic conditions, at full bandwidth, 400GE ports experienced zero packet loss in line-speed forwarding. Multi-service stack tests showed that protocol-based forwarding was normal; bundled 400GE and 100GE ports could implement precise load balancing; the transmission distance was as far as 10 km; and loopback and fault reporting functions were normal.
Now, if only the IEEE would get the work done to define the standard. But its still years away from becoming a standard and thus making the IEEE once again a poor custodian of standards.
China Telecom Guangzhou and Huawei Complete World’s First 400GE Test – Huawei Press Center : http://www.huawei.com/en/news/2017/10/World-First-400GE-Test