Sample Configurations

Depending on the type of Equinix Precision Time service that you and your clients use, various PTP and NTP client configuration settings are required.

Equinix PTP Service Configurations

Configuration Parameter	Equinix Provided Configurations	Tool Tip
Domain	30	PTP domain is a network, or portion of a network, within which PTP operates. Within this network, all the clocks are in sync.
Log Announce Interval	1	Logarithmic value that controls the rate of PTP Announce packets from the PTP time server. Default is 1 (1 packet every 2 seconds).
Log Delayreq Interval	-4	Logarithmic value that controls the rate of PTP DelayReq packets. Default is -4 (16 packets per second).
Log Sync Interval	-4	Logarithmic value that controls the rate of PTP Sync packets. Default is -4 (16 packets per second).
Priority1	128	Lower value indicates higher priority.
Priority2	128	Lower value indicates higher priority.
Clock Class	13	Value that indicates the timescale which delivers UTC timestamps (set by default).
Clock Accuracy	23	Value that indicates how accurate the source is to UTC time. Equinix Time sources are accurate up to 1µs from UTC (set by default).

Sample Configurations

These sections contain sample configuration code for NTP and PTP clients. The values apply for default Precision Time Service settings.

Sample Configuration – chronyd

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server 192.168.1.21 iburst prefer
server 192.168.1.22 iburst prefer
driftfile /path/to/chrony/drift 
makestep 1 3 
rtcsync
logdir /path/to/log/directory
pidfile /path/to/chrony.pid
log measurements statistics tracking

Sample Configuration – ntpd

The Network Time Protocol daemon (ntpd) is the sample configuration used for NTP client devices.

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driftfile /var/lib/ntp/drift
restrict default nomodify notrap nopeer noquery
restrict 127.0.0.1 
restrict ::1
server 192.168.1.21 iburst true
server 192.168.1.22 iburst true
includefile /etc/ntp/crypto/pw
keys /etc/ntp/keys
disable monitor

Sample Configuration – ptpd

Similarly, the Precision Time Protocol daemon (ptpd) maintains the system time to synchronize with time servers using PTP.

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ptpengine:preset=slaveonly
ptpengine:domain=30
ptpengine:sync_outlier_filter_enable=y
ptpengine:delay_outlier_filter_enable=y
ptpengine:sync_stat_filter_enable=y
ptpengine:delay_stat_filter_enable=y
ptpengine:log_announce_interval=1
ptpengine:log_sync_interval=-4
ptpengine:log_delayreq_interval=-4
ptpengine:calibration_delay=20
ptpengine:hardware_timestamping=y
clock:allow_step_backwards=y
clock:allow_step_backwards_hw=y
global:log_status=y
global:status_file=/path/to/ptp.status
global:log_file=/path/to/ptp.log
global:log_statistics=y
global:statistics_log_interval=0
global:statistics_timestamp_format=both
global:statistics_update_interval=1
global:statistics_file=/path/to/ptp.statistics
global:lock_file=/path/to/ptp.pid

Sample Configuration – ptp4l

The ptp4l tool is an implementation of PTP for Linux.

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[global]
twoStepFlag             1
slaveOnly               0
priority1               128
priority2               128
domainNumber            30
logAnnounceInterval     1
logSyncInterval         -4
logMinDelayReqInterval  -4
tx_timestamp_timeout    100
logging_level   6

Sample Configuration – Arista 7050 Boundary Clock Mode Configuration

This Arista 7050 tool is an implementation of IEEE 1588 PTP for boundary clock. If you are using Arista 7050 for boundary clock mode within the client network, this sample configuration code can be used.

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<< Enabling Global PTP configurations on the switch >>
ptp mode boundary
ptp domain 30
ptp source ip 172.16.100.9


<< Slave Port Specific Configuration>>
interface Ethernet47
description ECX::EQIX-EPT-SV5-CX-PRI-03
switchport mode trunk
ptp enable
ptp sync-message interval -4
ptp announce interval 0
ptp delay-req interval -4
ptp vlan 111

Sample Configuration – Arista 7150 Boundary Clock Mode

This is a similar tool, for Arista 7150. If you are using Arista 7150 for boundary clock mode within the client network, this sample configuration code can be used.

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<< Slave Port Specific Configuration>>
interface Port-Channel13 
   switchport trunk allowed vlan 13
   switchport mode trunk
   ptp enable
   ptp sync-message interval -4
   ptp announce interval 1
   ptp delay-req interval -4
   ptp vlan 13
 
interface Ethernet44 
   description reserved_PTP
   switchport trunk allowed vlan 13
   switchport mode trunk
   channel-group 13 mode active
   ptp enable
   ptp vlan 13

<< Enabling Global PTP configurations on the switch >>
ptp domain 30 
ptp source ip 10.100.1.209
ptp priority1 129
ptp mode boundary

Sample Configuration – NTP over Anycast Solution using Network Edge

See the Anycast Use Case for details about configuring Network Edge devices, including routers, firewalls, and NTP, over Anycast.