Users Guide

877| Management Access Dell Networking W-Series ArubaOS 6.5.x| User Guide
To set the time zone and daylight savings time adjustment, enter the following commands in configure mode:
clock timezone <WORD> <-23 - 23>
clock summer-time <zone> [recurring]
<1-4> <start day> <start month> <hh:mm>
first <start day> <start month> <hh:mm>
last <start day> <start month> <hh:mm>
<1-4> <end day> <end month> <hh:mm>
first <end day> <end month> <hh:mm>
last <end day> <end month> <hh:mm>
[<-23 - 23>]
Clock Synchronization
You can use NTP to synchronize the controller to a central time source. Configure the controller to set its
system clock using NTP by configuring one or more NTP servers.
For each NTP server, you can optionally specify the NTP iburst mode for faster clock synchronization. The
iburst mode sends up ten queries within the first minute to the NTP server. (When iburst mode is not enabled,
only one query is sent within the first minute to the NTP server.) After the first minute, the iburst mode
typically synchronizes the clock so that queries need to be sent at intervals of 64 seconds or more.
The iburst mode is a configurable option and not the default behavior for the controller, as this option is considered
“aggressive” by some public NTP servers. If an NTP server is unresponsive, the iburst mode continues to send
frequent queries until the server responds and time synchronization starts.
In the WebUI
1. Navigate to the Configuration > Management > Clock page.
2. Under NTP Servers, click Add.
3. Enter the IP address of the NTP server.
4. Select (check) the iburst mode, if desired.
5. Click Add.
In the CLI
ntp server ipaddr [iburst]
Configuring NTP Authentication
The Network Time Protocol adds security to an NTP client by authenticating the server before synchronizing
the local clock. NTP authentication works by using a symmetric key which is configured by the user. The secret
key is shared by both the controller and an external NTP server. This helps identify secure servers from
fraudulent servers.
In the WebUI
1. Navigate to the Configuration > Management > Clock page.
2. Under NTP Authentication, make sure Enable is selected. Enable is the default option.
3. Under NTP Servers, enter the NTP server IP address (IPv4/IPv6) in the Server IP field.
4. Under NTP Identification Keys, enter an identification key (a number between 1 and 65535) in the
Identification Key field. Then add a secret string in the MD5 Secret field. The MD5 ID key must be an
ASCII string up to 31 characters.
5. Click Add.
6. The identification key along with its corresponding MD5 secret string is displayed in the Identification
Keys section.