I am using an X430-8p switch to connect two Altera Arria 10 kits running Linux PTP. I am using L2 802.1AS (gPTP) and I'm wondering how the port role assignment should work in my case. If I would like my one A10 kits to be GM, and the other one to be an OC slave, what should be the port roles? I am able to manipulate priorities to get both A10 nodes as slaves to the switch, and in this case, the sync works very well (~20ns or less) but when I have one as master and one as slave, they seem to sync but very poorly with large path delays.
In this case, where I would like one A10 kit to be master and one as slave (through the switch), should both switch ports report as Passive gPTP port role? Is there a way to force ports to passive role?