CIG CS-6436-56P

A member of the Nephos Taurus family. CIG stands for Cambridge Industries Group. Perhaps noteworthy, the Taurus family is a chiplet design. The specs don't say this, but I suspect that the SERDES are separate from the body of the switch ASIC and added in sufficient number to provide the ports required for each family member. A full design package was submitted to OCP.

The OCP submission also included a slide show that contains the size of the packet memory.