Command Line Reference Guide

Time and Network Time Protocol (NTP) | 1355

Time and Network Time Protocol (NTP)

Overview

The commands in this chapter configure time values on the system, either using FTOS, or the

hardware, or using the Network Time Protocol (NTP). With NTP, the switch can act only as a client to

an NTP clock host. For details, refer to the “Network Time Protocol” section of the Management

chapter in the FTOS Configuration Guide.

The commands in this chapter are generally supported on the C-Series, E-Series, and S-Series, with

some exceptions, as noted in the Command History fields and by these symbols under the command

headings:

c e s

Commands

• calendar set

• clock read-calendar

• clock set

• clock summer-time date

• clock summer-time recurring

• clock timezone

• clock update-calendar

• debug ntp

• ntp authenticate

• ntp authentication-key

• ntp broadcast client

• ntp disable

• ntp master

• ntp multicast client

• ntp server

• ntp source

• ntp trusted-key

• ntp update-calendar

• show calendar

• show clock

• show ntp associations

• show ntp status