74 lines
4.8 KiB
HTML
74 lines
4.8 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="SNTP client" />
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<meta name="abstract" content="This topic provides information about the SNTP client on i5/OS." />
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<meta name="description" content="This topic provides information about the SNTP client on i5/OS." />
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<meta name="DC.Relation" scheme="URI" content="rzaktconcept.htm" />
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<meta name="DC.Relation" scheme="URI" content="http://www.ntp.org/" />
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<meta name="DC.Relation" scheme="URI" content="http://www.eecis.udel.edu/~mills/ntp/servers.html" />
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<meta name="DC.Relation" scheme="URI" content="rzaktscenario1.htm" />
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<meta name="DC.Relation" scheme="URI" content="rzaktconfig.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2000, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2000, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzaktclient" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>SNTP client</title>
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</head>
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<body id="rzaktclient"><a name="rzaktclient"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">SNTP client</h1>
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<div><p>This topic provides information about the SNTP client on i5/OS™.</p>
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<p>When SNTP is configured as a client, the iSeries™ server retrieves a time value
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from an external time source. You can specify from which sources (up to three)
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to retrieve the time value. This external time value is compared to the iSeries system
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time. If the iSeries time
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value does not match the external time source, a time adjustment begins. The iSeries system
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time is adjusted until the required time value is reached.</p>
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<p>The SNTP client allows you to configure the i5/OS operating system to poll a Network
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Time Protocol (NTP) or SNTP server to find out the time. The SNTP client updates
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the system clock. Most applications use the system clock as their time source.
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By updating the system clock, applications reflect the synchronized time obtained
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from the time server.</p>
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<p>The first server in the list that can provide valid time service will be
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selected. When the selected time server fails, a new time server will be selected.
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The time server should be selected based on minimum network response time
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delay at the location where the iSeries server is installed. </p>
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<p>A list of public time servers is maintained on the Internet. To locate
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a time server, you can use a search engine with a query of <dfn class="term">NTP servers</dfn>.</p>
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<p>You can run the SNTP client and the SNTP server concurrently on your iSeries server.
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This allows you to obtain time from an outside source, and then serve that
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time to clients on your network. To do this, you need to synchronize the clocks
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on your network.</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaktconcept.htm" title="Learn about the Simple Network Time Protocol (SNTP) and how it is implemented on the i5/OS operating system.">SNTP concepts</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rzaktscenario1.htm" title="This scenario demonstrates using the iSeries server as both an SNTP server and an SNTP client.">Scenario: Synchronize clocks with iSeries server</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="rzaktconfig.htm" title="This information provides details about how to configure SNTP on your iSeries server.">Configure SNTP</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="http://www.ntp.org/" target="_blank">NTP: The Network Time Protocol (http://www.ntp.org/)</a></div>
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<div><a href="http://www.eecis.udel.edu/~mills/ntp/servers.html" target="_blank">Public NTP Time Servers (http://www.eecis.udel.edu/~mills/ntp/servers.html)</a></div>
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</div>
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</div>
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</body>
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</html>
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