Getting Started with iControl > Key Concepts > Lookup Services > Examples: Service and Alarm Discovery Scenarios > Example 1 — Single Application Server
 
Example 1 — Single Application Server
In a typical, basic iControl configuration, only one Application Server is needed to handle all of the iControl functions. Any TCP/IP devices associated with the Application Server are on the same subnet.

[ Graphic ] 

1. Since Alpha is the only Application Server on Subnet A, its Lookup Service should be ON.
2. The GSM is active on Alpha.
3. Since Alpha is the only Application Server on Subnet A, it is not necessary to type anything in the Service and alarm discovery area.
 

IMPORTANT: System behavior  

If the Service and alarm discovery table of Application Servers is empty, client applications on the local Application Server can see services and alarms coming from the local GSM and all active GSMs on Application Servers within the subnet.

4. When iC Navigator (or any client application) is downloaded from Alpha by this PC, the application will perform a multicast discovery within Subnet A, find the Alpha Lookup Service, and then be able to see all devices and services registered on Alpha.
5. If this PC has access to Subnet A (e.g. via VPN), it can access Alpha’s iControl—Startup page from a Web browser, and download iC Navigator (or any client applet). The application knows about the Lookup Service on Alpha, and so the client PC will be able to see all devices and services registered on Alpha.