Installation guide

Switch Services
5-24
4. Use the Pool Name field to define a new pool name. Enter the pool name created using Adding a
New DHCP Pool on page 5-7.
5. Use the Class Name field to associate an existing class, created using Adding a New DHCP User
Class Name on page 5-20.
6. The Pool Class Address Range field is used to assign address range to the class inside the pool.
A maximum of 4 address ranges can be assigned to a class.
a. Use the Insert button to enter the Start IP and End IP address range for a class.
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 switch.
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
5.3 Configuring Secure NTP
Secure Network Time Protocol (SNTP) is central for networks that rely on their switch to supply system time.
Without an SNTP implementation, switch 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 switch managed enterprise network.
The switch 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 switch interoperation.
The SNTP configuration activity is divided amongst the following tasks:
• Defining the Secure NTP Configuration
• Configuring Symmetric Keys
• Defining a NTP Neighbor Configuration
• Viewing NTP Associations
• Viewing NTP Status
5.3.1 Defining the Secure NTP Configuration
SNTP provides synchronized timekeeping between the switch and a time server. Use the Configuration tab to
define how SNTP resources are authenticated before interacting with the switch and enable ACL IDs to be
mapped to SNTP access groups.
To define the SNTP configuration:
1. Select Services > Secure NTP from the main menu tree.
NOTE Often, the switch NTP status will not be adequately updated after modifying the
NTP configuration. Periodically check the switch NTP status when making changes
to ensure the proper time is displayed, as it may take awhile for the switch to
update the proper NTP status.