Users Guide

● Reference Timestamp (sys.reftime, peer.reftime, pkt.reftime) — This is the local time, in timestamp
format, when the local clock was last updated. If the local clock has never been synchronized, the value is zero.
● Originate Timestamp: The departure time on the server of its last NTP message. If the server becomes
unreachable, the value is set to zero.
● Receive Timestamp — the arrival time on the client of the last NTP message from the server. If the server becomes
unreachable, the value is set to zero.
● Transmit Timestamp — the departure time on the server of the current NTP message from the sender.
● Filter dispersion — the error in calculating the minimum delay from a set of sample data from a peer.
To view the NTP configuration, use the show running-config ntp command in EXEC privilege mode. The following
example shows an encrypted authentication key (in bold). All keys are encrypted.
DellEMC#show running ntp
!
ntp authenticate
ntp authentication-key 345 md5 5A60910F3D211F02
ntp server 11.1.1.1 version 3
ntp trusted-key 345
DellEMC#
Configuring NTP control key password
The Network Time Protocal daemon (NTPD) design uses NTPQ to configure NTPD. NTP control key supports encrypted and
unencrypted password options. The ntp control-key- passwd command authenticates NTPQ packets. The default
control-key-passwd authenticates the NTPQ packets until the user changes the control-key using the ntp control-key-
passwd command.
To configure NTP control key password, use the following command.
Configure NTP control key password.
CONFIGURATION mode
ntp control-key-passwd [encryption-type] password
Configuring the NTP Step-Threshold
You can configure the NTP step-threshold timer using the following procedure:
● Enter the CONFIGURATION mode.
CONFIGURATION mode
● Run the ntp step-threshold command and ensure to specify a value between 128 milliseconds and 5000 milliseconds
(5 seconds).
DellEMC(conf)#ntp step-threshold 5000
Use the no ntp step-threshold command to revert to the default setting of 128 milliseconds.
DellEMC(conf)#no ntp step-threshold
Configuring a Custom-defined Period for NTP time
Synchronization
You can configure the system to send an audit log message to a syslog server if the time difference from the NTP server is
greater than a threshold value (offset-threshold). However, time synchronization still occurs. To configure the offset-threshold,
follow this procedure.
● Specify the threshold time interval before which the system generates an NTP audit log message if the system time deviates
from the NTP server.
System Time and Date
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