Mld Snooping - TP-Link JetStream T1600G-28TS User Manual

The following entries are displayed on this screen:
Auto Refresh
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Auto Refresh:
Refresh Period:
IGMP Statistics
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Port:
Query Packet:
Report Packet (V1):
Report Packet (V2):
Report Packet (V3):
Leave Packet:
Error Packet:

8.2 MLD Snooping

MLD Snooping
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Multicast Listener Discovery(MLD)snooping is applied for efficient distribution of IPv6 multicast
data to clients and routers in a Layer 2 network. With MLD snooping, IPv6 multicast data is
selectively forwarded to a list of ports that want to receive the data, instead of being flooded to all
ports in a VLAN. The list is constructed and maintained by snooping IPv6 multicast control packets.
MLD snooping performs a similar function in IPv6 as IGMP snooping in IPv4.
The switch, running MLD snooping, listens to the MLD messages transmitted between the host
and the router, and tracks the MLD messages and the registered port. When receiving MLD report
message, the switch adds the port to the multicast address table; when the switch listens to MLD
Done message from the host, the router sends the Multicast-Address-Specific Query message of
the port to check if other hosts need this multicast, if yes, the switch will receive MLD report
message; if no, the switch will receive no response from the hosts and the switch will remove the
port from the multicast address table. The router regularly sends MLD query messages. The
switch will remove the port from the multicast address table if the switch receives no MLD report
message from the host within a period of time.
MLD Snooping Fundamentals
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1. MLD Messages
MLD Queries：MLD Queries include General Queries and Multicast-Address-Specific Queries
(MASQs) and are sent out from the MLD router.
MLD Reports：When a host wants to join a multicast group or responds to the MLD queries, it will
send out an MLD report.
MLD Done Messages：When a host wants to leave a multicast group, it will send out an MLD
Done message to inform the IPv6 multicast routers of its leave.
2. Relevant Ports of the Switch
Router Port: Indicates the switch port that links toward the MLD router.
Select Enable/Disable auto refresh feature.
Enter the time from 3 to 300 in seconds to specify the auto refresh
period.
Displays the port number of the switch.
Displays the number of query packets the port received.
Displays the number of IGMPv1 report packets the port received.
Displays the number of IGMPv2 report packets the port received.
Displays the number of IGMPv3 report packets the port received.
Displays the number of leave packets the port received.
Displays the number of error packets the port received.
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