CDM-840 Remote Router MN-CDM840
Ethernet-based Remote Product Management Revision 3
6–55
6.3.3.3.1.2 Configuration | Network | Routing | IGMP
When operating a network in Bridge Point-to-Multipoint (BPM) mode, user traffic
will pass through the various traffic ports; however, the management of the
network is required to be through the routed Management Network.
IGMP (Internet Group Management Protocol), when enabled, responds to IGMP queries for the
configured multicast routes on the transmit side and generates IGMP queries on the receive
side. If there are no active IGMP receivers on the LAN, it stops forwarding the multicast traffic
(received from the satellite) to the LAN.
Use this page to enable IGMP for configured multicast routes.
Figure 6-27. Configuration | Network | Routing | IGMP Page
IGMP
WAN to traffic port multicast traffic – Use the drop-down list to set operation as Use IGMP or
Forward All Multicast.
IGMP Configuration
The valid operating ranges are provided in this section in parentheses, where applicable.
• Version – Use the drop-down list to select IGMPv1, IGMPv2, or IGMPv3.
• Last Member Query Interval (1 to 25) – Enter a value, in seconds. The default is 1 second.
This is the maximum response time inserted into group-specific queries that are set in
response to Leave Group messages, and is also amount of time between group-specific
query messages. This value may be tuned to modify the "leave latency" of the network; a
reduced value results in reduced time to detect the loss of the last member of a group.
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