Installation Guide

2. Enter clock set dateTime (CCYY-MM-DDTHH:MM:SS) command while in privileged EXEC mode.
The following example sets the clock to August 17, 2016, 12:15 p.m.
device# clock set 2016-08-17T12:15:00
If you want to show the clock and time zone settings, use the show clock command.
device# show clock
2016-08-29 12:15:00 location/GMT
Time zones
You can set the time zone for a device by using the clock timezone command. The time zone setting has the following characteristics:
• The time zone setting automatically adjusts for Daylight Savings Time.
• Changing the time zone on a device updates the local time zone setup and is reected in local time calculations.
• By default, all devices are in the Greenwich Mean Time (GMT) time zone (0,0).
• System services that have already started will reect the time zone changes only after the next reboot.
• Time zone settings persist across failover for high availability.
• Time zone settings are not aected by Network Time Protocol (NTP) server synchronization.
The following regions are supported: Africa, America, Arctic, Antarctica, Asia, Atlantic, Australia, Europe, Indian, and Pacic. One of these,
along with a city name, establishes the time zone. Refer to Setting the time zone on page 72.
Time synchronization
To keep the time in your network current, it is recommended that each device has its time synchronized with at least one external NTP
server.
The device maintains the current clock server value in nonvolatile memory. By default, this value is the local device clock.
The ntp server command accepts multiple server addresses in either IPv4 or IPv6 format. When multiple NTP server addresses are
passed, ntp server sets the rst obtainable address as the active NTP server. If there are no reachable time servers, then the local time is
the default time.
Synchronizing local time using NTP
Perform the following steps to synchronize the local time using NTP.
1. Log in to the device using the admin account (the default password is password).
2. Enter
congure terminal to enter global conguration mode.
3. Set the clock manually within 1000 seconds of the current time before setting up NTP on the device. Refer to Setting the clock
(date and time) on page 70 for more information.
4. Enter ntp server IPv4 address, where IPv4 address is the IP address of the rst NTP server in IPv4 format, which the device
must be able to access. By default, this value is LOCL, which uses the local clock as the clock server.
device(config)# ntp server "132.163.135.131"
To display the NTP server IP address, use the show ntp status command. If you are in global conguration mode, enter do
before the show command.
Setting the date and time
ExtremeRouting SLX 9850-8 Hardware Installation Guide
9035475-02 Rev AA 71