Concept Guide

Table Of Contents
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
Time and Date
You can set the time and date in the Dell Networking OS using the CLI.
Configuration Task List
This section describes configuring the time and date settings.
Setting the Time and Date for the Switch Hardware Clock
Setting the Time and Date for the Switch Software Clock
Setting the Timezone
Setting Daylight Saving Time Once
Setting Recurring Daylight Saving Time
968
System Time and Date