207 lines
3.8 KiB
Markdown
207 lines
3.8 KiB
Markdown
# Prereqs
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Here I assume that your NIC is called enp4s0d1
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Then check if the client supports **hardware-transmit** and **hardware-receive**.
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```bash
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ethtool -T enp4s0d1
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```
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If the client does support these two, continue on
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# Prepare PTP configs
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First, install the **linuxptp** package.
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Then make sure that no other time synchronization services, like chrony or ntpd or systemd-timesynced, are running.
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```bash
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sudo systemctl stop ntpd
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sudo systemctl stop chrony
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sudo systemctl stop systemd-timesyncd
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sudo systemctl disable ntpd
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sudo systemctl disable chrony
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sudo systemctl disable systemd-timesyncd
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```
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## Create PTP config file
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sudo vim /etc/linuxptp/ptp4l-client.conf
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```bash
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[global]
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verbose 1
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# Hardware timestamping using the NIC PHC
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time_stamping hardware
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# Must match your grandmaster
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domainNumber 0
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network_transport UDPv4
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delay_mechanism E2E
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# Force this machine to be a PTP client, never grandmaster
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clientOnly 1
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# Useful while tuning
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summary_interval 1
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# Repeat these square brackets for each interface
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[enp4s0]
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```
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# Make PTP persistent
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sudo vim /etc/systemd/system/ptp4l-client.service
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```bash
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[Unit]
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Description=PTP client on enp4s0
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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ExecStart=/usr/sbin/ptp4l -i enp4s0 -f /etc/linuxptp/ptp4l-client.conf -m
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Restart=always
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RestartSec=3
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[Install]
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WantedBy=multi-user.target
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```
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sudo vim /etc/systemd/system/phc2sys-client.service
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```bash
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[Unit]
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Description=Sync system clock from enp4s0 PHC
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After=ptp4l-client.service
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Requires=ptp4l-client.service
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[Service]
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Type=simple
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ExecStart=/usr/sbin/phc2sys -s enp4s0 -c CLOCK_REALTIME -w -m
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Restart=always
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RestartSec=3
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[Install]
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WantedBy=multi-user.target
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```
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Then reload daemon and activate both PTP client and phc2sys
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```bash
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sudo systemctl daemon-reload
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sudo systemctl enable --now ptp4l-client.service
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sudo systemctl enable --now phc2sys-client.service
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```
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# Verification
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Verify if PTP and phc2sys works with these commands
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```bash
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journalctl -u ptp4l-client -f
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journalctl -u phc2sys-client -f
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```
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and also verify the status of PTP with these commands
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```bash
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pmc -u -b 0 'GET PORT_DATA_SET'
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pmc -u -b 0 'GET TIME_STATUS_NP'
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pmc -u -b 0 'GET CURRENT_DATA_SET'
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```
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# Boundary clock server
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First, create a ptp4l-boundary-server.conf
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sudo vim /etc/linuxptp/ptp4l-boundary-server.conf
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```bash
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[global]
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time_stamping hardware
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domainNumber 0
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network_transport UDPv4
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delay_mechanism E2E
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# boundary_clock_jbod 1
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# Let BMCA decide:
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# upstream-facing port should become SLAVE/client
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# downstream-facing port should become MASTER/server
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priority1 200
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priority2 128
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summary_interval 1
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[eno1]
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# toward RPi5 grandmaster
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[ens1f0]
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# toward Nexus
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```
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Here's systemd service configs for a boundary clock server
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sudo vim /etc/systemd/system/ptp4l-boundary-server.service
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```bash
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[Unit]
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Description=PTP client on <NIC1>, <NIC2>
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After=network-online.target
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Wants=network-online.target
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[Service]
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Type=simple
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ExecStart=/usr/sbin/ptp4l -i <NIC1> -i <NIC2> -f /etc/linuxptp/ptp4l-boundary-server.conf -m
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Restart=always
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RestartSec=3
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[Install]
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WantedBy=multi-user.target
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```
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sudo vim /etc/systemd/system/phc2sys-boundary-server.service
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```bash
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[Unit]
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Description=Sync system clock from enp4s0 PHC
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After=ptp4l-boundary-server.service
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Requires=ptp4l-boundary-server.service
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[Service]
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Type=simple
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ExecStart=/usr/sbin/phc2sys -a -rr -m
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Restart=always
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RestartSec=3
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[Install]
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WantedBy=multi-user.target
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```
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Then reload daemon and activate both PTP client and phc2sys
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```bash
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sudo systemctl daemon-reload
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sudo systemctl enable --now ptp4l-boundary-server.service
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sudo systemctl enable --now phc2sys-boundary-server.service
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```
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