135Clock ID : 000FE2-FFFE-FF0001Clock type : LocalClock domain : 0Number of PTP ports : 2Priority1 : 128Priority2 : 128Clock quality :Class : 248Accuracy : 254Offset (log variance) : 65535Offset from master : N/AMean path delay : N/ASteps removed : N/ALocal clock time : Sun Jan 15 20:57:29 2011# Display brief PTP statistics on Device B.[DeviceB] display ptp interface briefName State Delay mechanism Clock step Asymmetry correctionGE2/0/1 N/A P2P Two 0GE2/0/2 N/A P2P Two 0PTP configuration example (IEEE 1588 version 2,unicast transmission)Network requirementsAs shown in Figure 47, a PTP domain contains Device A, Device B, and Device C. Device A is the GMand receives the ToD clock signals. Device C sends ToD clock signals to the base station through its ToDinterface.• Configure all devices to use PTP standard IEEE 1588 version 2.• Configure the destination IP address for unicast PTP messages transmission over UDP (IPv4).• Configure the clock node type as OC for Device A and Device C, and E2ETC for Device B.• Configure the delay measurement mechanism for Device A and Device C as p2p.Figure 47 Network diagramConfiguration procedure1. Assign IP addresses to the interfaces, and make sure the devices can reach each other, as shownin Figure 47. (Details not shown.)2. Configure Device A:# Specify the PTP standard as IEEE 1588 version 2. system-view
