2-2.2 Ntp - ZyXEL Communications XGS3600 Series Manual

2-2.2 NTP

NTP is Network Time Protocol and is used to sync the network time based Greenwich Mean
Time (GMT). If use the NTP mode and select a built-in NTP time server or manually specify
an user-defined NTP server as well as Time Zone, the switch will sync the time in a short after
pressing <Apply> button. Though it synchronizes the time automatically, NTP does not update
the time periodically without user's processing.
Time Zone is an offset time off GMT. You have to select the time zone first and then perform
time sync via NTP because the switch will combine this time zone offset and updated NTP
time to come out the local time, otherwise, you will not able to get the correct time. The switch
supports configurable time zone from –12 to +13 step 1 hour.
Default Time zone: +8 Hrs.
Web Interface
To configure Time in the web interface:
1. Click SYSTEM, NTP.
2. Specify the Time parameter in manual parameters.
3. Click Apply.
Figure 2-2.2: The NTP configuration
Parameter description:
Server 1 to 5 :

Provide the NTP IPv4 or IPv6 address of this switch. IPv6 address is in 128-bit
records represented as eight fields of up to four hexadecimal digits with a colon
separating each field (:). For example, 'fe80::215:c5ff:fe03:4dc7'. The symbol
'::' is a special syntax that can be used as a shorthand way of representing
multiple 16-bit groups of contiguous zeros; but it can only appear once.It can
also represent a legally valid IPv4 address. For example, '::192.1.2.34'.
Buttons

These buttons are displayed on the NTP page:
Apply – Click to apply changes.
Reset - Click to undo any changes made locally and revert to previously saved
values.
XGS3600 Series User's Guide
11