On Tue, Aug 20, 2019 at 09:38:45PM -0700, Richard Cochran wrote: > Overall, the PTP switch use case is well supported by Linux. The > synchronization of the management CPU to the PTP, while nice to have, > is not required to implement a Transparent Clock. Your specific > application might require it, but honestly, if the management CPU > needs good synchronization, then you really aught to feed a PPS from > the switch into a gpio (for example) on the CPU.
Another way to achieve this is to have a second MAC interface on the management CPU connected to a spare port on the switch. Then time stamping, PHC, ptp4l, and phc2sys work as expected. Thanks, Richard
