Comtech EF Data CDM-570/L Vipersat Parameter Editor - Manual (Page 39)

Chapter 2 - Using Parameter Editor 2-23
Network
For example, assume that a modem/router has the IGMP Query Period set to 60
seconds and the Number of Missed Responses set to 3. If a client joins an IGMP
group, then the service to that group will not be discontinued until no clients
respond to a query from the unit for a period of 60x3=180 seconds.
Modem as IGMP Client
Note: If the unit is a CDD-56X, it cannot operate as an IGMP client and the
options in the Modem as IGMP Client dialog box will be grayed out and
unavailable.
Figure 2-17 IGMP Client dialog
Recognize IGMP Queries
The Recognize IGMP Queries box determines whether the modem/router will
respond to periodic queries from an IGMP server that publishes a request to join
a specified multicast group. If this box is selected, the unit will respond to an
IGMP query by requesting to join a multicast group published by the server that
is defined in the unit’s route table.
If this box is not selected, the modem/router will not respond to IGMP queries
from a server. In this type of configuration, the unit is configured to uncondi-
NOTE