https://www.juniper.net/documentation/us/en/software/junos/cli-reference/topics/ref/statement/stateful-edit-protocols-ptp-mx-series.html
stateful (Precision Time Protocol) | Junos OS | Juniper Networks
Configure the stateful port or bidirectional port with parameters. A stateful port is useful when you configure PTP over Ethernet for multicast mode of...
precision time protocoljunos osstatefuljunipernetworks