System Time And Date; Network Time Protocol - Dell Force10 S4810P Configuration Manual

High-density, 1ru 48-port 10gbe switch

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Table of Contents

System Time and Date

System times and dates can be set and maintained through the Network Time Protocol (NTP). They are

also set through FTOS CLIs and hardware settings.

This chapter includes the following sections:

Protocol Overview

Implementation Information

Configuring Network Time Protocol

FTOS Time and Date

Configuring time and date settings

Set daylight saving time

Network Time Protocol

Network Time Protocol (NTP) synchronizes timekeeping among a set of distributed time servers and

clients. The protocol also coordinates time distribution in a large, diverse network with a variety of

interfaces. In NTP, servers maintain the time and NTP clients synchronize with a time-serving host. NTP

clients choose from among several NTP servers to determine which of f ers the best available source of time

and the most reliable transmission of information.

NTP is a fault-tolerant protocol that will automatically select the best of several available time sources to

synchronize to. Multiple candidates can be combined to minimize the accumulated error. Temporarily or

permanently insane time sources will be detected and avoided.

Dell Force10 recommends configuring NTP for the most accurate time. In FTOS, other time sources can

be configured (the hardware clock and the software clock).

NTP is designed to produce three products: clock offset, roundtrip delay, and dispersion, all of which are

relative to a selected reference clock.

Clock offset represents the amount to adjust the local clock to bring it into correspondence with the

reference clock.

settings and Network Time Protocol are supported on platforms:

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