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Updated:December 13, 2018
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Configure Simple Network Time Protocol (SNTP) Authentication Settings on a Switch through the Command Line Interface (CLI)
Simple Network Time Protocol (SNTP) is the simplified version of Network Time Protocol (NTP). NTP is the protocol that is used to synchronize the clock on a network. It provides time within 100 milliseconds of the accurate time, but does not authenticate traffic.
The SNTP authentication page of the switch allows the administrator to configure NTP authentication keys to verify a time source. SNTP authentication should be used only in situations where strong authentication is not required as it does not provide the complex filtering mechanisms of NTP.
This document explains how to define SNTP Authentication through the Command Line Interface (CLI) of a switch. You may also configure SNTP authentication settings through the web-based utility of the switch. For instructions, click here.
1.4.7.05 - Sx300, Sx500
2.2.8.04 - Sx350, SG350X, Sx550X
Configure SNMP Groups on a Switch
Step 1. Access the CLI of the switch.
Note: In this example, PuTTY is the application used to access the switch CLI. The default username and password is cisco/cisco. If you have customized your credentials, use your username and password.
Step 2. Switch to Global Configuration mode by entering the following command:
Step 3. Define an SNTP Authentication Key using one of the following syntax: