Mld Control Messages; Mld Snooping Settings - D-Link DAS-3626 User Manual

MLD Control Messages

Three types of messages are transferred between devices using MLD snooping. These three messages are all
defined by three ICMPv6 packet headers, labeled 130, 131 and 132.
1. Multicast Listener Query – Similar to the IGMPv2 Host Membership Query for IPv4, and labeled as 130 in
the ICMPv6 packet header, this message is sent by the router to ask if any link is requesting multicast data.
There are two types of MLD query messages emitted by the router. The General Query is used to advertise all
multicast addresses that are ready to send multicast data to all listening ports, and the Multicast Specific
query, which advertises a specific multicast address that is ready. These two types of messages are
distinguished by a multicast destination address located in the IPv6 header and a multicast address in the
Multicast Listener Query Message.
2. Multicast Listener Report – Comparable to the Host Membership Report in IGMPv2, and labeled as 131 in
the ICMP packet header, this message is sent by the listening host to the switch stating that it is interested in
receiving multicast data from a multicast address in response to the Multicast Listener Query message.
3. Multicast Listener Done – Akin to the Leave Group Message in IGMPv2, and labeled as 132 in the ICMPv6
packet header, this message is sent by the multicast listening host stating that it is no longer interested in
receiving multicast data from a specific multicast group address, therefore stating that it is "done" with the
multicast data from this address. Once this message is received by the switch, it will no longer forward
multicast traffic from a specific multicast group address to this listening host.

MLD Snooping Settings

This table is used to enable MLD Snooping on the switch and to configure the settings for MLD snooping.
To view this window, click Switch Configuration > MLD Snooping > MLD Snooping Settings, as shown below:
To configure the settings for an existing entry click the corresponding Edit button which will display the following
window.
DAS-3626 VDSL2 Switch User Manual
Figure 76. MLD Snooping Settings menu
Figure 77. MLD Snooping Parameters Settings – Edit menu
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