System Management Commands 4

ntp server

This command sets the IP addresses of the servers to which NTP time requests are issued. Use the no form of the command to clear a specific time server or all servers from the current list.

Syntax

ntp server ip-address [version number] [key key-number]no ntp server [ip-address]

ip-address- IP address of an NTP time server.

number - The NTP version number supported by the server. (Range: 1-3)

key-number- The number of an authentication key to use in communications with the server. (Range: 1-65535)

Default Setting

Version number: 3

Command Mode

Global Configuration

Command Usage

This command specifies time servers that the switch will poll for time updates when set to NTP client mode. It issues time synchronization requests based on the interval set with the ntp poll command. The client will poll all the time servers configured, the responses received are filtered and compared to determine the most reliable and accurate time update for the switch.

You can configure up to 50 NTP servers on the switch. Re-enter this command for each server you want to configure.

NTP authentication is optional. If enabled with the ntp authenticate command, you must also configure at least one key number using the ntp authentication-keycommand.

Use the no form of this command without an argument to clear all configured servers in the list.

Example

Console(config)#ntp server 192.168.3.20

Console(config)#ntp server 192.168.3.21

Console(config)#ntp server 192.168.4.22 version 2

Console(config)#ntp server 192.168.5.23 version 3 key 19

Console(config)#

Related Commands

ntp client (4-68) ntp poll (4-70) show ntp (4-72)

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Accton Technology ES3528M-SFP manual Ntp server, Syntax, Version number, Ntp client 4-68 ntp poll 4-70 show ntp