Configuring DNS Servers for Resolving Host Names of NTP and RADIUS Servers

Because the Global Settings screen allows you to set up NTP and RADIUS servers by defining their host names, you have to configure your DNS servers to resolve the host names of NTP and RADIUS servers to the corresponding IP addresses. Go to VNS > Global Settings.

Note

For more information on RADIUS server configuration, see Defining RADIUS Servers and MAC Address Format.

You can configure up to three DNS servers to resolve NTP and RADIUS server host names to their corresponding IP addresses.

The controller sends the host name query to the first DNS server in the stack of three configured DNS servers. The DNS server resolves the queried domain name to an IP address and sends the result back to the controller.

If for some reason, the first DNS server in the stack of configured DNS servers is not reachable, the controller sends the host name query to the second DNS server in the stack. If the second DNS server is also not reachable, the query is sent to the third DNS server in the stack.

To configure DNS servers for resolving host names of NTP and RADIUS servers:

1. From the top menu, click Controller.
2. In the left pane, click Administration > Host Attributes. The Host Attributes screen displays.
   

   
3. In the DNS box, type the DNS server‘s IP address in the Server Address field and then click Add Server. The new server is displayed in the DNS servers‘ list.
   

   Note

   You can configure up to three DNS servers. The Server Address field supports both IPv4 and IPv6 addresses.
4. Int the Default Gateway IP box, enter the IP address of the Default Gateway.
5. To save your changes, click Save.