Cisco seems to recommend the Nexus 9300 series switching
https://network.nvidia.com/files/doc-2020/pb-sn2410.pdf
https://developer.nvidia.com/networking/rivermax
I reached out to Deltacast:
https://www.deltacast.tv/products/developer-products/software-development-kit/videomasterip-sdk#
https://github.com/OpenVisualCloud/Media-Transport-Library
Haters! https://www.stop2110.org/
Uses Precision Time Protocol (PTP) which relies on GNSS (GPS and others)
PTP provides synchronization within a few microseconds on a network (vs. The accuracy of NTP which is a few milliseconds)
Grandmaster clock such as Evertz or Tektronix combine an internal oven controlled oscillator with GNSS (which synchronize its satellite atomic clocks with ground control atomic clocks)
Possible budget test setup?
$100 ea. QSFP100G
https://www.fs.com/products/71009.html?attribute=452&id=1776476
$90 ea. 10m MPO female-female
https://www.fs.com/products/68115.html?attribute=6150&id=109513