HP VPN Firewall Appliances Appendix Protocol Reference

122
Field Descri
p
tion
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 79 shows the
MLD report message format.
Figure 79 MLDv2 report message format
Table 16 MLDv2 report message field description
Field Descri
p
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.)