Summit WM3000 Series Controller System Reference Guide 259
b Select a address range and click Remove to delete that particular address range.
7 Refer to the Status field. It displays the current state of the requests made from the applet. Requests
are any “SET/GET” operation from the applet. The Status field displays error messages if something
goes wrong in the transaction between the applet and the controller.
8 Click OK to save the new configuration and close the dialog window.
9 Click Cancel to close the dialog without committing updates to the running configuration.
Configuring Secure NTP
Secure Network Time Protocol (SNTP) is central for networks that rely on their controller to supply system
time. Without an SNTP implementation, controller time is unpredictable, which can result in data loss,
failed processes and compromised security. With network speed, memory and capability increasing at
an exponential rate, the accuracy, precision and synchronization of network time is essential in a
controller managed enterprise network. The controller can either use a dedicated server to supply
system time or can use several forms of SNTP messaging to sync system time with network traffic
authenticated and secure for controller interoperation.
Often, the controller NTP status will not be adequately updated after modifying the NTP configuration. Periodically
check the controller NTP status when making changes to ensure the proper time is displayed, as it may take awhile
for the controller to update the proper NTP status.
The SNTP configuration activity is divided amongst the following tasks:
● Defining the SNTP Configuration
● Configuring Symmetric Keys
● Defining a NTP Neighbor Configuration
● Viewing NTP Associations
● Viewing NTP Status
Defining the SNTP Configuration
Symmetric keys are algorithms for cryptography that use trivially related cryptographic keys for both
decryption and encryption. The encryption key is related to the decryption key, as they may be identical
or there is a simple mechanism to go between keys. The keys represent a shared secret between the
controller and its time resource.
When using the SNTP service, ensure that traffic can pass on UDP port 123 between the controller and the NTP
server.
To define the SNTP configuration:
1 Select Services > Secure NTP from the main menu tree.
2 Select the Configuration tab.
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