© Copyright Lenovo 2017 Chapter 4: Configuration Commands 371ntp primary server {data port|mgt port}Prompts for the port of the primary NTP server to which you want tosynchronize the switch clock.Command mode: Global configurationntp primary server or IP address> [data port|mgt port]Prompts for the IP address or host name of the primary NTP server to whichyou want to synchronize the switch clock.Command mode: Global configurationno ntp primary serverDeletes the primary NTP server.Command mode: Global configurationntp offset <0‐86400>Configures the minimum offset in seconds between the switch clock and theNTP server that triggers a system log message.The default value is 300 seconds.Command mode: Global configurationno ntp offsetResets the NTP offset to the default 300 seconds value.Command mode: Global configurationntp secondary server {data port|mgt port}Prompts for the port of the secondary NTP server to which you want tosynchronize the switch clock.Command mode: Global configurationntp secondary server or IP address>[data port|mgt port]Prompts for the IP address or host name of the secondary NTP server to whichyou want to synchronize the switch clock.Command mode: Global configurationno ntp secondary serverDeletes the secondary NTP server.Command mode: Global configurationntp source loopback <1‐5>Sets the NTP source loopback interface.Command mode: Global configurationno ntp source loopbackDeletes all NTP source loopback interface.Command mode: Global configurationTable 156. NTP Server Configuration Options (continued)Command Syntax and Usage