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DAS-3626 VDSL2 Switch User Manual
IPv4 Limited Multicast Range Settings
The IPv4 Limited Multicast Range Settings enables the user to configure the ports or VLANs on the switch that will
be involved in the Limited IPv4 Multicast Range. The user can configure the range of IPv4 multicast addresses that
will be accepted on the ports or VLANs.
To configure these settings, click Switch Configuration > IGMP Snooping > IPv4 Limited Multicast Range
Settings.
Figure 74. IPv4 Limited Multicast Range Settings menu
To add a new range enter the information and click Add, to delete an entry enter the information and click Delete.
IPv4 Max Multicast Group Settings
The IPv4 Max Multicast Group Settings allows users to configure the ports on the switch that will be apart of the
max number of multicast groups that can be learned by data driven.
To view this window, click Switch Configuration > IGMP Snooping > IPv4 Max Multicast Group Settings as
shown below:
Figure 75. IPv4 Max Multicast Group Settings menu
To add a new IPv 4 Max Multicast Group, enter the information and click Apply, to search for an entry click Find.
MLD Snooping
Multicast Listener Discovery (MLD) Snooping is an IPv6 function used similarly to IGMP snooping in IPv4. It is used to
discover ports on a VLAN that are requesting multicast data. Instead of flooding all ports on a selected VLAN with
multicast traffic, MLD snooping will only forward multicast data to ports that wish to receive this data through the use
of queries and reports produced by the requesting ports and the source of the multicast traffic.
MLD snooping is accomplished through the examination of the layer 3 part of an MLD control packet transferred
between end nodes and a MLD router. When the switch discovers that this route is requesting multicast traffic, it adds
the port directly attached to it into the correct IPv6 multicast table, and begins the process of forwarding multicast
traffic to that port. This entry in the multicast routing table records the port, the VLAN ID and the associated multicast
IPv6 multicast group address and then considers this port to be a active listening port. The active listening ports are
the only ones to receive multicast group data.
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