Extreme Networks ExtremeSwitching VDX 6740 - Setting the Date and Time; Time Zones; Time Synchronization; Synchronizing Local Time Using NTP

2. Take the appropriate action based on whether you want to enable or disable IPv6 autoconguration:
• Enter the ipv6 address autocong command to enable IPv6 autoconguration for all managed entities on the target
platform.
• Enter the no ipv6 address autocong command to disable IPv6 autoconguration for all managed entities on the target
platform.
Setting the date and time
Extreme Networks devices maintain the current date and time inside a real-time clock (RTC) circuit. Date and time are used for logging
events. The device does not depend on the date and time for its operation; even with an incorrect date and time value, the device
functions properly. However, because the date and time are used for logging, error detection, and troubleshooting, you should set them
correctly.
Time zones
You can set the time zone for the device by using the clock timezone command. The time zone setting has the following characteristics:
• The clock timezone 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). If all devices in a fabric are in one time zone, it is
possible for you to keep the time zone setup at the default setting.
• 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, Antarctica, Asia, Atlantic, Australia, Europe, Indian, and Pacic. One of these, along
with a city name, establishes the time zone.
Time synchronization
To keep the time in your network current, it is recommended that the principal switch has its time synchronized with at least one external
NTP server. The other devices in the fabric will automatically take their time from the principal switch.
All devices in the fabric maintain the current clock server value in nonvolatile memory. By default, this value is the local clock server of the
principal switch. Changes to the clock server value on the principal switch are propagated to all switches in the fabric.
When a new device enters the fabric, the time server daemon of the principal switch sends out the addresses of all existing clock servers
and the time to the new device.
The ntp server command accepts multiple server addresses in IPv4 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).
Setting the date and time
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