本文介绍车载以太网交换机中 Port 主从、速率、 gPTP 时间同步、VLAN 的配置方法。Port configP6 100M Slave6:{PortGeneral:{SelectedPortIf:100BASE T1 PHY,SelectedLinkSpeed:100M,Role:false,PowerDown:false},端口角色说明SelectedPortIf选择物理接口类型此处为 100BASE-T1 PHY车载以太网物理层。SelectedLinkSpeed链路速率配置为 100Mbps。Role端口角色false表示该端口作为 Slave从时钟工作。PowerDown端口是否下电false表示端口正常工作。gPTP开启 P1/P2/P5/P6/P9 PTP, P1 SlaveGlobalPTP:{Slave0JoinedPtpPorts:[true, true, false, false, true, true, false, false, true, false,false],Slave1JoinedPtpPorts:[false, false, false, false, false, false, false, false, false, false,false],Slave2JoinedPtpPorts:[false, false, false, false, false, false, false, false, false, false,false],SelectedEnableSync:Enable,SelectedBasicMode:P2P TCBC,EnablePerDomainMode:false,Domain0BasicMode:P2P TCBC,Domain1BasicMode:P2P TCBC,Domain2BasicMode:P2P TCBC,SelectedSlave0:Port1,SelectedSlave1:Port4,SelectedSlave2:Port4,Slave1Domain:1,Slave2Domain:2,Slave0Pri:248,Slave1Pri:248,Slave2Pri:248,Slave0Priority2:247,Slave1Priority2:247,Slave2Priority2:247,SyncInterval:1/8s,AnnounceInterval:1/8s,pdelayReq:1s,GptpMesInterval:1s,PerPortIntervalEn:false,PortSyncInterval:{Slave0:[1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s],Slave1:[1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s],Slave2:[1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s,1/8s]},SelectedGPIOB1:Slave 0,SelectedGPIOB2:Slave 0,GPIOB1:False,GPIOB2:False,IndiviPdelaySetting:false,SelectedFeatures:Enable AS2011 Features,GMTime:false,CMLDS:true,SendPdelayReq:false,关键字段说明字段值含义Slave0JoinedPtpPorts端口为 true端口加入 PTP 同步SelectedBasicModeP2P TCBC点到点透明时钟 边界时钟模式SelectedSlave0Port1Slave 绑定的物理端口SendPdelayReqfalseMaster 不发送 pDelay 报文验证方法配置完成后可通过以下方式验证 PTP 同步是否生效# 查看 PTP 时钟状态ptp4l-H-2-ienp108s0-fautomotive-slave.cfg ptp4l-H-2-ienp108s0-fautomotive-master.cfg tcpdump-ieth_xg-vv-e-nether proto 0x88F7-wptp_capture_$(($(ls ptp_capture_*.pcap2/dev/null|wc-l)1)).pcapVLAN