119Tasks at a glanceThe PTP standard is IEEE 802.1AS (802.1AS):(Required.) Specifying a clock node type(Optional.) Specifying a PTP domain(Optional.) Configuring an OC to operate only as a member clock(Optional.) Configuring ToD input or output(Optional.) Configuring the role of a PTP port(Optional.) Configuring the port type for a TC+OC(Optional.) Configuring the interval for sending announce messages(Optional.) Specifying the number of announcement intervals before the receiving node stops receivingannounce messages(Optional.) Configuring the interval for sending Pdelay_Req messages(Optional.) Configuring the interval for sending Sync messages(Optional.) Configuring the delay correction value(Optional.) Configuring the cumulative offset between the UTC and TAI(Optional.) Configuring the correction date of the UTC(Optional.) Configuring ToD clock parameters(Optional.) Configuring a priority for a clock(Optional.) Specifying the system time source as PTP(Required.) Enabling PTP on a portSpecifying a PTP standardBefore you configure PTP, specify a PTP standard. Otherwise, PTP cannot operate. Changing the PTPstandard for the device clears all PTP configurations defined by the standard.To specify a PTP standard:Step Command Remarks1. Enter system view. system-view N/A2. Specify a PTP standard. ptp profile { 1588v2 | 8021as }By default, no PTP standard isconfigured, and PTP is not runningon the device.Specifying a clock node typeYou can configure only one of the following types of clock nodes for a device: OC, BC, E2ETC, P2PTC,E2ETC+OC, or P2PTC+OC.Follow these guidelines when you specify a clock node type:• Before you specify the clock node type, specify a PTP standard.• If the PTP standard is IEEE 802.1AS, the clock node type cannot be E2ETC or E2ETC+OC.• Changing the clock node type clears all PTP configurations except the PTP standard.To specify a clock node type:
