HP 4800G Series Configuration Manual page 980

MLD query message
An MLD querier learns the multicast listening state of neighbor interfaces by sending MLD query
messages. Figure 1-3
shows the format of an MLDv1 message.
Figure 1-3 Format of MLDv2 query message
0 3 4 7
Type = 130
Maximum Response Delay
Reserved S QRV
Table 1-1 describes the fields in
Table 1-1 Description on fields in an MLDv2 query message
Field
Type = 130
Code
Checksum
Maximum Response Delay
Reserved
Multicast Address
S
QRV
shows the format of an MLD query message. The dark blue area in the figure
15
Code
Multicast Address (128 bits)
QQIC
Source Address [1] (128 bits)
Source Address [n] (128 bits)
Figure 1-3.
Message type. For a query message, this field is set to 130.
Initialized to zero
Standard IPv6 checksum
Maximum response delay allowed before a host sends a report
message
Reserved field and initialized to zero
This field is set to 0 in a general query message.
It is set to a specific IPv6 multicast address in a
multicast-address-specific
multicast-address-and-source-specific query message.
Flag indicating whether a router updates the timer for suppression
after receiving a query message.
Querier's Robustness Variable
Checksum
Reserved
Number of Sources (n)
Description
1-5
31
query message or