Extreme Networks Summit WM3000 Series Reference Manual page 260

Controller Services
3 An ACL Id must be created before it is selectable from any of the drop-down menus. Refer to the
Access Group field to define the following:
Full Access
Only Control Queries
Server and Query
Access
Only Server Access
4 Refer to the Other Settings field to define the following:
Authenticate Time
Sources
Act As NTP Master
Clock
260
Supply a numeric ACL ID from the drop-down menu to provide the ACL
full access.
Supply a numeric ACL ID from the drop-down menu to provide the ACL
only control query access to SNTP resources.
Enter a numeric ACL ID from the drop-down menu to provide the ACL
Server and Query access to SNTP resources.
Provide a numeric ACL ID from the drop-down menu to provide the ACL
only server access to SNTP resources.
Select this checkbox to ensure credential authentication takes place
between the SNTP server and the controller. When this checkbox is
selected, the Apply and Revert buttons become enabled to save or cancel
settings.
When this checkbox is selected, the Apply and Revert buttons become
enabled to save or cancel settings within the Other Settings field.
Summit WM3000 Series Controller System Reference Guide