NTP

Mõisted

• NTP - Network Time Protocol
• PTP - Precision Time Protocol
• NTS - Network Time Security
• TSC - time-stamp counter
• PHC - PTP hardware clock
• RTC - Real Time Clock

Misc

• hardware time stamping support

Kasulikud lisamaterjalid

• https://opensource.com/article/17/6/timekeeping-linux-vms
• https://github.com/Xilinx-CNS/sfptpd
• https://docs.amd.com/r/en-US/ug1602-ptp-user/What-s-New
• https://enterprise-support.nvidia.com/s/article/Running-Linux-PTP-with-ConnectX-4-ConnectX-5-ConnectX-6

linuxptp paigaldamine

# apt-get install linuxptp

mis sisaldab

root@rae-cf-03:~# dpkg -L linuxptp
.
/etc/linuxptp/ptp4l.conf
/etc/linuxptp/timemaster.conf
..
/lib/systemd/system/phc2sys@.service
/lib/systemd/system/ptp4l@.service
/lib/systemd/system/timemaster.service
...
/usr/sbin/hwstamp_ctl
/usr/sbin/nsm
/usr/sbin/phc2sys
/usr/sbin/phc_ctl
/usr/sbin/pmc
/usr/sbin/ptp4l
/usr/sbin/timemaster
/usr/sbin/ts2phc
...

Võrgukaardi riistvara tugi

Proxmox v. 8 ehk Linux kernel v. 6.8 tingimustes

Võrgukaart '02:00.0 Ethernet controller: Intel Corporation Ethernet 10G 2P X520 Adapter (rev 01)'

$ ethtool -T enp2s0f0
Time stamping parameters for enp2s0f0:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 2
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	ptpv1-l4-sync
	ptpv1-l4-delay-req
	ptpv2-event

Võrgukaart '3d:00.0 Ethernet controller: Mellanox Technologies MT2894 Family [ConnectX-6 Lx]'

$ ethtool -T ens7f0np0
Time stamping parameters for ens7f0np0:
Capabilities:
	hardware-transmit
	hardware-receive
	hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	all

Võrgukaart '49:00.0 Ethernet controller: QLogic Corp. FastLinQ QL41000 Series 10/25/40/50GbE Controller (rev 02)'

$ ethtool -T ens8f0
Time stamping parameters for ens8f0:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	ptpv1-l4-event
	ptpv1-l4-sync
	ptpv1-l4-delay-req
	ptpv2-l4-event
	ptpv2-l4-sync
	ptpv2-l4-delay-req
	ptpv2-l2-event
	ptpv2-l2-sync
	ptpv2-l2-delay-req
	ptpv2-event
	ptpv2-sync
	ptpv2-delay-req

Võrgukaat '81:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)'

# ethtool -T enp129s0f0np0
Time stamping parameters for enp129s0f0np0:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	all

Võrgukaart '01:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GBASE-T (rev 02)'

# ethtool -T eno2np1
Time stamping parameters for eno2np1:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 1
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	ptpv1-l4-sync
	ptpv1-l4-delay-req
	ptpv2-l4-event
	ptpv2-l4-sync
	ptpv2-l4-delay-req
	ptpv2-l2-event
	ptpv2-l2-sync
	ptpv2-l2-delay-req
	ptpv2-event
	ptpv2-sync
	ptpv2-delay-req

Võrgukaart '02:00.0 Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5720 Gigabit Ethernet PCIe'

# ethtool -T enp2s0f0
Time stamping parameters for enp2s0f0:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	ptpv1-l4-event
	ptpv2-l4-event
	ptpv2-l2-event

Võrgukaart '07:00.0 Ethernet controller: Intel Corporation I211 Gigabit Network Connection (rev 03)'

# ethtool -T enp7s0
Time stamping parameters for enp7s0:
Capabilities:
	hardware-transmit
	software-transmit
	hardware-receive
	software-receive
	software-system-clock
	hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
	off
	on
Hardware Receive Filter Modes:
	none
	all

Võrgukaart '02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)'

# ethtool -T enp2s0
Time stamping parameters for enp2s0:
Capabilities:
	software-transmit
	software-receive
	software-system-clock
PTP Hardware Clock: none
Hardware Transmit Timestamp Modes: none
Hardware Receive Filter Modes: none

Kasulikud lisamaterjalid

• http://ftp.netbsd.org/pub/NetBSD/NetBSD-current/src/external/bsd/ntp/dist/util/ntp-keygen.html
• http://support.ntp.org/bin/view/Support/ConfiguringAutokey
• http://doc.ntp.org/4.2.8/autokey.html
• Computer Network Time Synchronization: The Network Time Protocol on Earth and in Space
• https://www.linuxuprising.com/2019/07/how-to-set-timezone-and-enable-network.html
• https://ahelpme.com/linux/simple-time-synchronization-of-a-server-laptop-desktop-using-built-in-systemd-timesyncd-service/