參考文獻：

http://linuxptp.sourceforge.net/

https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/servers/Configuring_PTP_Using_ptp4l/

https://blog.csdn.net/fhxy_xzw/article/details/79303132

https://packages.ubuntu.com/xenial/s390x/linuxptp/filelist

1、安裝linuxptp

sudo apt-get install linuxptp

2、下載linuxptp源碼：

git clone git://git.code.sf.net/p/linuxptp/code linuxptp

cd linuxptp

cp configs/gPTP.cfg ./

vim gPTP.cfg

添加：

p2p_dst_mac01:1B:19:00:00:00

修改：

neighborPropDelayThresh80000

ptp_dst_mac01:1B:19:00:00:00

3、參考README配置：

sudo vim /usr/share/doc/linuxptp/README.Debian

1. Default configuration

The default configuration can be found in /etc/linuxptp/ptp4l.conf.

This is the default.cfg provided by the upstream source.

2. Systemd services

The service ptp4l invokes ptp4l on eth0 by default. To adjust the

parameters, follow these steps:

1. create a directory /etc/systemd/system/ptp4l.service.d

2. place a file with its name ending in .conf there

3. put these lines into the file, with the parameters adjusted to your needs:

[Service]

ExecStart=

ExecStart=/usr/sbin/ptp4l -f /etc/linuxptp/ptp4l.conf -i eth0

參考示例：

/home/amine/linuxptp/gPTP.cfg

#

# 802.1AS example configuration containing those attributes which

# differ from the defaults. ?See the file, default.cfg, for the

# complete list of available options.

#

[global]

gmCapable?? ??? ?1

priority1?? ??? ?248

priority2?? ??? ?248

logAnnounceInterval?? ?0

logSyncInterval?? ??? ?-3

syncReceiptTimeout?? ?3

neighborPropDelayThresh?? ?80000

min_neighbor_prop_delay?? ?-20000000

assume_two_step?? ??? ?1

path_trace_enabled?? ?1

follow_up_info?? ??? ?1

transportSpecific?? ?0x1

ptp_dst_mac?? ??? ?01:1B:19:00:00:00

p2p_dst_mac?? ??? ?01:1B:19:00:00:00

network_transport?? ?L2

delay_mechanism?? ??? ?P2P

/etc/systemd/system/ptp4l.service.d/gPTP.conf

[Service]

ExecStart=

ExecStart=/usr/sbin/ptp4l -2 -f /home/amine/linuxptp/gPTP.cfg -i eth0.10 -i eth0.20 -i eth0.30 -i eth0.40 -i eth0.50 -i eth0.60 -i eth0.70 -i eth0.80 eth0.90 -i eth0.100 -i eth0.110 -i eth0.120 -i eth0.130 -i eth0.140 -i eth0.150 -i eth0.160 -i eth0.170 -i eth0.180 -q -l 6 -S

特殊說明：

我配置的VLAN網卡比較多，導致ptp4l.service啟動錯誤，我修改了

/lib/systemd/system/ptp4l.service

的 [Unit] 增加

After=network.target

[Unit]

Description=Precision Time Protocol (PTP) service

Documentation=man:ptp4l

After=network.target

總結

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