Lenovo NE2572

Introduced June 20, 2017

Hints: The 25 Gb/s ports can use optical SFP28s, so this can't be Gen 1 Tomahawk. It has 22 MByte of buffer which matches Tomahawk+ but not Cavium or Barefoot. So, probably Tomahawk+.

There is a data sheet, but it isn't terribly helpful. Much better is the switch product guide that has info on data buffering.