On Thu, Oct 22, 2020 at 12:17:48PM +0200, Christian Eggers wrote: > I tried to study the effect of setting the ocmode bit on the KSZ either to > master or to slave. The main visible change is, that some PTP message types > are be filtered out on RX: > - in "master" mode, "Sync" messages from other nodes will not be received > (but everything else like "Announce" seem to work) > - in "slave" mode, "Delay_Req" messages from other nodes will not be received Could you dump the contents of your REG_PTP_MSG_CONF2 register?