host1(config-if)#ntp disable
■ Use the no version to reenable NTP on an interface.
■ See ntp disable.
ntp server
■ Use to assign an NTP server to the system and to customize the way the server
communicates with the system.
■ Specify the source option to direct responses from the NTP server to a specific
interface on the system and override the ntp source command.
■ Example
host1(config)#ntp server 192.35.42.1 version 3 prefer source atm 3/0.1
■ Use the no version to terminate communications between the system and an
NTP server.
■ See ntp server.
ping
■ Use to check that the system can reach an NTP server.
■ Example
host1(config)#ping 192.35.42.1
■ There is no no version.
■ See ping.
Directing Responses from NTP Servers
By default, an NTP server sends a response to the interface from which an NTP
request originated. You can now direct responses from all NTP servers to one interface
on the system or direct responses from a specific NTP server to a specific interface.
ntp source
■ Use to direct responses from all NTP servers to a specific interface. Using the
source option with the ntp server command overrides the ntp source command.
■ Example
host1(config)#ntp source atm 3/1
■ Use the no version to direct all servers to reply to the interface from which the
NTP request was sent (the default setting).
■ See ntp source.
NTP Configuration Tasks ■ 529
Chapter 10: Configuring the System Clock
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