NL1901ACV Enhanced Hybrid 4G LTE Gateway – User Guide
UG01063 v. 1.0 December 2018
a) Allows controlling the amount of IGMP reports sent during a
time window.
b) Engages the report suppression feature, which permits a host to
suppress its own report and conserve bandwidth.
Last Member Query
Interval
IGMP uses this value when gateway hears IGMP Leave report. This
means that at least one host wants to leave the group. After gateway
receives the Leave report, it checks that the interface is not
configured for IGMP Immediate Leave (single-host on the segment)
and if not, it sends out an out-of-sequence query.
The robustness variable is a way of indicating how susceptible the
subnet is to lost packets. IGMP can recover from robustness variable
minus 1 lost IGMP packets. You can also click the scroll arrows to
select a new setting. The robustness variable should be set to a
value of 2 or greater.
The default robustness variable value is 2.
The maximum number of multicast groups that the gateway can
control at any one time.
Maximum Multicast
Data Sources
The maximum number of data sources a multicast group can have.
Maximum Multicast
Group Members
The maximum number of hosts a multicast group can have.
With IGMP fast-leave processing, which means that the gateway
immediately removes the interface attached to a receiver upon
receiving a Leave Group message from an IGMP host.
Table 34 – Multicast settings table
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