Hi Richard, On Mon Dec 13 2021, Richard Cochran wrote: > On Mon, Dec 13, 2021 at 11:18:10AM +0100, Kurt Kanzenbach wrote: > >> @@ -1055,7 +1058,7 @@ static int hellcreek_setup_fdb(struct hellcreek *hellcreek) >> .portmask = 0x03, /* Management ports */ >> .age = 0, >> .is_obt = 0, >> - .pass_blocked = 0, >> + .pass_blocked = 1, > > This one should stay blocked. You're right. I confirmed with Hirschmann. Only peer delay measurements should be allowed on blocked ports. In addition, we also have to add static entries for STP with pass_blocked bit set. Furthermore, the UDP entries are missing as well. Currently it only works for 802.1AS even though the driver happily announces V2_EVENT capability. I'll clean it up and resend properly. Thanks, Kurt