Comtech EF Data CDM-IP 300L - Manual (Page 194)

CDM-IP 300L IP-Centric Satellite Modem Rev. 1
CD/CDMIP300L.IOM
168
Menu Options/Fields Entry Description
CDM-IP as Server:
Number of missed
responses before leaving
IGMP group M Defines the number of membership queries that go
unanswered from LAN clients before the Ethernet
Interface will no longer forward data for that IGMP
group.
Consider a CDM-IP that 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 CDM-IP for a
period of 60*3 = 180 seconds.
CDM-IP as Client:
Recognized IGMP queries C The Recognize IGMP Queries parameters determines
if the CDM-IP should respond to periodic queries from
an IGMP server that publishes a request to join a
specified multicast group. This parameter can assume
one of (2) values:
1. Yes
2. No
If set to YES, the CDM-IP will respond to an IGMP
query by requesting to join a Multicast Group published
by the server that is defined in the CDM-IP’s route
table.
If set to NO, the CDM-IP will not respond to IGMP
queries from a server. In this type of configuration, the
CDM-IP may be configured to unconditionally request
to join an IGMP group at an interval specified by the
“Unsolicited Report Interval” option in the Transmitter
IGMP Client Configuration Page.
CDM-IP as Client:
IGMP Version used for
Unsolicited Reports U This parameter defines which version of the IGMP
protocol should be followed when attempting to join a
group on a Multicast Server via an unsolicited report.
When the CDM-IP is configured to Recognize IGMP
Queries, the CDM-IP will respond to a query in the
same version that the server used to initiate the query.
This parameter will assume one of (2) values:
1. V1
2. V2
The value of V1 will configure the CDM-IP to use the
IGMP Version 1 protocol to join a Multicast Group
available on an IGMP Server in response to an IGMP
Query.
The value of V2 will configure the CDM-IP to use the
IGMP Version 2 protocol to join a Multicast Group
available on an IGMP Server in response to an IGMP
Query.
The user can toggle the value of the IGMP Version
used for Unsolicited Reports from ‘V1’ and ‘V2’ with
each selection.