Grass Valley iControl V.4.43 - Manual (Page 45)

iControl
User Guide
35
3. It is not necessary to type anything in Alpha’s Service and alarm discovery area. The
discovery process will automatically result in all devices and services on Subnet A
registering with Alpha’s Lookup Service.
4. In order to share the monitoring workload, the GSM is active on Bravo.
5. As mentioned above, the discovery process will result in all devices and services on
Subnet A automatically registering with Alpha’s Lookup Service. So it would not ordinarily
be necessary to type anything in Bravo’s Service and alarm discovery area. This is not true,
however, when Bravo is accessed by a client PC from another subnet (see below).
6. When iC Navigator (or any client application) is downloaded from Alpha by this PC, the
application will perform a multicast discovery (see "Multicasting vs. Unicasting" , on
page 40) within Subnet A, find the enabled Alpha Lookup Service, and then be able to see
all devices and services registered on both Alpha and Bravo.
7. 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 enabled Lookup Service on Alpha, and so the client PC will be able to see
all devices and services registered on both Alpha and Bravo.
If, however, the PC’s Web browser is pointed to Bravo’s Startup page, and downloads a client
application, the applet will not automatically detect the lookup service on Alpha, and so
none of Bravo’s services or devices will be visible on the client PC. In order to enable direct
access, type Alpha’s IP address in Bravo’s Service and alarm discovery area—the
application will be able to find the lookup service, and therefore see everything on
Subnet A.
Example 3 — Multiple Application Servers on Different Subnets
It is common in larger iControl configurations to have multiple Application Servers on
different subnets. Lookup services allow Application Servers from one subnet to share
information with Application Servers on another subnet.
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.