HPE 5820X Series, Руководство по настройке

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Table 11 MLDv2 report message field description
Field Description
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.)
MLD SSM mapping
The MLD SSM mapping feature enables you to configure static MLD SSM mappings on the last-hop
router to provide SSM support for receiver hosts that are running MLDv1. The SSM model assumes
that the last-hop router has identified the desired IPv6 multicast sources when receivers join IPv6
multicast groups.
•
When a host that runs MLDv2 joins a multicast group, it can explicitly specify one or more
multicast sources in its MLDv2 report.
•
A host that runs MLDv1, however, cannot specify multicast source addresses in its MLDv1
report. You must configure the MLD SSM mapping feature to translate the (*, G) information in
the MLDv1 report into (G, INCLUDE, (S1, S2...)) information.
Figure 111 Network diagram
On the IPv6 SSM network as shown in Figure 111 , Host A and Host B runs MLDv1 and Host C runs
MLDv2. To provide SSM service for Host A and Host B, you must configure the MLD SSM mapping
feature on Router A.
With the MLD SSM mapping feature configured, when Router A receives an MLDv1 report, it
examines the IPv6 multicast group address G carried in the message.
MLDv1 report
MLDv2 report
Router A
Querier
Host A (MLDv1)
IPv6 SSM
Receiver
Host B (MLDv1)
Receiver
Host C (MLDv2)
Receiver