This test was performed by Digt.

let's go

First we need to install ptp daemon on Linux platform. I am using Ubuntu Server 18.04 for testing.

sudo apt install ptpd 

we need two servers that ping each other.

saha@server1:~$ ifconfig

Ge0: inet 192.168.1.104  netmask 255.255.255.0  broadcast 192.168.1.255

saha@server2:~$ ifconfig

MGMT1: inet 192.168.1.107  netmask 255.255.255.0  broadcast 192.168.1.255

Just use the configuration files provided in this directory on the two servers or servers under test.

First we review configuration file

sudo vim /etc/ptpd.conf

Next we make sure that protocol is disabled

sudo service ptpd stop
sudo service ptpd status

To ensure service is active, we can use the following commands

sudo pkill ptpd; sudo service ptpd stop; sudo /usr/sbin/ptpd -c /etc/ptpd.conf 2>/dev/null; sudo service ptpd start

We use following commands to ensure that ntp protocol and timesync daemon is disabled

sudo timedatectl set-ntp no ; sudo systemctl stop systemd-timesyncd.service

We use following command to display system clock in detail

timedatectl

View protocol logs

sudo cat /var/log/ptpd2.log | tail -n 10

To change the clock

sudo date +%T -s "11:17:00" ; sudo hwclock -w

View messages sent from master to Slave.

And we will see that time difference is decreasing.

sudo cat /var/log/ptpd2.stats | tail -n 10

When we're done, we reactivate services

sudo timedatectl set-ntp yes ; sudo systemctl start systemd-timesyncd.service

coming soon ...