I have a pair of Intel E810-XXVDA4T timing NICs at home that I’m using as NTP time sources and I wanted to write up how to configure these. The E810-XXCDA4T is a 4-port 25 GbE NIC that is optimized for use as a network time source. It includes a GNSS/GPS receiver, an extremely accurate oscillator, and a very low-latency NIC all in a single package. This is far and away the most accurate network time source that I’ve had my hands on, but it takes a little bit of tweaking to use it properly...
