OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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Configuring NTP Configuring Network Time Protocol (NTP) NTP Servers An NTP client needs to receive NTP updates from an NTP server. Each client must have at least one server with which it synchronizes (unless it is operating in broadcast mode). There are also adjustable server options. Designating an NTP Server To configure an NTP client to receive updates from an NTP server, enter the ntp server command with the server IP address or domain name, as shown: or -> ntp server 1.1.1.1 -> ntp server spartacus It is possible to remove an NTP server from the list of servers from which a client synchronizes. To do this, enter the ntp server command with the no prefix, as shown: -> no ntp server 1.1.1.1 Enabling/Disabling NTP Server Synchronization Tests To enable an NTP client to invoke NTP server synchronization tests as specified by the NTP protocol, enter the ntp server synchronized command as shown: -> ntp server synchronized NTP synchronization is enabled by default. Note. The NTP protocol discards the NTP servers that are unsynchronized. To disable an NTP client from invoking tests for NTP server synchronization, enter the ntp server unsynchronized command, as shown: -> ntp server unsynchronized Disabling peer synchronization tests allows the NTP client to synchronize with either an NTP peer that is not synchronized with an atomic clock or a network of NTP servers that will finally synchronize with an atomic clock. Setting the Minimum Poll Time The minimum poll time is the number of seconds that the switch waits before requesting a time synchronization from the NTP server. This number is determined by raising 2 to the power of the number entered using the ntp server command with the server IP address (or domain name) and the minpoll keyword. For example, to set the minimum poll time to 128 seconds, enter the following: -> ntp server 1.1.1.1 minpoll 7 This would set the minimum poll time to 2 7 = 128 seconds. page 11-10 OmniSwitch AOS Release 8 Switch Management Guide May 2014
Configuring Network Time Protocol (NTP) Configuring NTP Setting the Version Number There are currently four versions of NTP available (numbered one through four). The version that the NTP server uses must be specified on the client side. To specify the NTP version on the server from which the switch receives updates, use the ntp server command with the server IP address (or domain name), version keyword, and version number, as shown: -> ntp server 1.1.1.1 version 3 The default setting is version 4. Marking a Server as Preferred If a client receives timestamp updates from more than one server, it is possible to mark one of the servers as the preferred server. A preferred server’s timestamp will be used before another unpreferred server timestamp. To specify an NTP as preferred, use the ntp server command with the server IP address (or domain name) and the prefer keyword, as shown: -> ntp server 1.1.1.1 prefer OmniSwitch AOS Release 8 Switch Management Guide May 2014 page 11-11
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Part No. 060391-10, Rev. A May 2014
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Contents About This Guide .........
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Contents Using the Switch as an FTP
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Contents Account and Password Polic
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Contents Authentication Trap ......
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Contents Firmware Upgrade Files ...
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About This Guide This OmniSwitch AO
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About This Guide Documentation Road
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About This Guide Related Documentat
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1 Logging Into the Switch Logging i
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Logging Into the Switch Quick Steps
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Logging Into the Switch Overview of
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Logging Into the Switch Accessing t
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Logging Into the Switch Setting the
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Logging Into the Switch Using Secur
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Logging Into the Switch Modifying t
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Logging Into the Switch Enabling th
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Logging Into the Switch Enabling th
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2 Managing System Files This chapte
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Managing System Files Switch Admini
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Managing System Files File and Dire
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Managing System Files Loading Softw
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Managing System Files Loading Softw
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Managing System Files Setting the S
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Managing System Files Setting the S
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3 Managing CMM Directory Content Th
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Managing CMM Directory Content CMM
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Managing CMM Directory Content Mana
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Managing CMM Directory Content Usin
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4 Using the CLI Alcatel-Lucent’s
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Using the CLI Command Entry Rules a
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Using the CLI Command Help -> sh vl
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Using the CLI Logging CLI Commands
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Using the CLI Customizing the Scree
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5 Working With Configuration Files
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Working With Configuration Files Tu
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Working With Configuration Files Qu
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Working With Configuration Files Cr
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Working With Configuration Files Cr
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6 Managing Switch User Accounts Swi
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Managing Switch User Accounts User
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Managing Switch User Accounts Overv
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Managing Switch User Accounts Overv
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Managing Switch User Accounts Creat
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Managing Switch User Accounts Confi
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Managing Switch User Accounts Setti
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Managing Switch User Accounts Multi
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7 Managing Switch Security Switch s
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Managing Switch Security Switch Sec
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Managing Switch Security Authentica
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Managing Switch Security Quick Step
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Managing Switch Security Setting Up
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Managing Switch Security Configurin
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8 Using WebView The switch can be m
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Using WebView WebView CLI Commands
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Using WebView WebView Overview Conf
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9 Using SNMP The Simple Network Man
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Configuring Virtual Chassis Display
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A Software License and Copyright St
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Alcatel-Lucent License Agreement Al
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B SNMP Trap Information This append
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SNMP Traps Table No. Trap Name Obje
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Index Symbols !! command 4-6 A aaa
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Index Network Time Protocol see NTP
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OS6860(E)_AOS_8.1.1.R01_Switch_Management_Guide

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