Number of Sources
• This field is set to 0 in a general query message or a
multicast-address-specific query message.
• This field represents the number of source addresses in a
multicast-address-and-source-specific query message.
Source Address( i )
IPv6 multicast source address in a multicast-address-specific query
message. (i = 1, 2, .., n, where n represents the number of multicast
source addresses.)
MLD report message
A host sends an MLD report message to report the current multicast listening state. Figure 75 shows the
MLD report message format.
Figure 75 MLDv2 report message format
Table 10 MLDv2 report message field description
Field Descri
tion
Type = 143
Message type. For a report message, this field is set to 143.
Reserved
The Reserved fields are set to 0 on transmission and ignored on
reception.
Checksum
Standard IPv6 checksum.
Number of Multicast Address Records
This field indicates how many IPv6 multicast address records are
present in this report message.
Multicast Address Record(i)
This field represents information of each IPv6 multicast address
the host listens to on the interface from which the report message
is sent, including record type, IPv6 multicast address, and IPv6
multicast source address on the sender. (i= 1, 2, ... m, where m
represents the number of IPv6 multicast address records).
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