ProCurve 6200yl Management And Configuration Manual page 202

Time Protocols
SNTP: Viewing, Selecting, and Configuring
Figure 9-11. Example of Disabling Time Synchronization by Disabling the SNTP Mode
9-14
Figure 9-10. Example of SNTP with Time Sychronization Disabled
Disabling the SNTP Mode. If you want to prevent SNTP from being used
even if selected by
timesync
eter), configure the SNTP mode as disabled.
Syntax: no sntp
Disables SNTP by changing the SNTP mode configuration to
Disabled .
For example, if the switch is running SNTP in Unicast mode with an SNTP
server at 10.28.227.141 and a server version of 3 (the default),
the SNTP configuration as shown below, and disables time synchronization
on the switch.
(or the Menu interface's
Even though the Time Sync Mode is set to Sntp,
time synchronization is disabled because no
sntp has disabled the SNTP Mode parameter.
param-
Time Sync Method
no sntp changes