Using the Simple Network Time Protocol
Summit 300-48 Switch Software User Guide 51

Do a GET When Configuring a VLAN

When configuring a VLAN using ExtremeWare Vista, prior to editing the VLAN configuration, you
must first click the get button to ensure that subsequent edits are applied to the correct VLAN. If you
do not click the get button and you submit the changes, the changes will be made to the VLAN that
was previously displayed.
If you configure a VLAN and then delete it, the default VLAN is shown in the VLAN name window, but
the VLAN information contained in the lower portion of the page is not updated. Click the get button
to update the display.

Sending Screen Output to Extreme Networks

If Extreme Networks requests that you email the output of a particular ExtremeWare Vista screen,
follow these steps:
1Click the content frame of the screen that you must send.
2From the Netscape Navigator File menu, select Save Frame As and enter a name for the file.
From the Microsoft Internet Explorer 3.0 File menu, select Save As and enter a name for the file.
From Microsoft Internet Explorer 4.0, right-click in the content frame, select View Source, and save
the HTML text by copying it and pasting it into a text editor.
3Attach the file to the email message that you are sending to Extreme Networks.
Using the Simple Network Time Protocol
ExtremeWare supports the client portion of the Simple Network Time Protocol (SNTP) Version 3 based
on RFC1769. SNTP can be used by the switch to update and synchronize its internal clock from a
Network Time Protocol (NTP) server. When enabled, the switch sends out a periodic query to the
indicated NTP server, or the switch listens to broadcast NTP updates. In addition, the switch supports
the configured setting for Greenwich Mean time (GMT) offset and the use of Daylight Savings Time.
These features have been tested for year 2000 compliance.

Configuring and Using SNTP

To use SNTP, follow these steps:
1Identify the host(s) that are configured as NTP server(s). Additionally, identify the preferred method
for obtaining NTP updates. The options are for the NTP server to send out broadcasts, or for
switches using NTP to query the NTP server(s) directly. A combination of both methods is possible.
You must identify the method that should be used for the switch being configured.
2Configure the Greenwich Mean Time (GMT) offset and Daylight Savings Time preference. The
command syntax to configure GMT offset and usage of Daylight Savings is as follows:
config timezone <GMT_offset> {autodst | noautodst}
The GMT_OFFSET is in +/- minutes from the GMT time. Automatic Daylight Savings Time (DST)
changes can be enabled or disabled. The default setting is enabled.
3Enable the SNTP client using the following command:
enable sntp-client