Configuring Ipv6 Pim-Dm - HP A6600 Configuration Manual

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DR election
IPv6 PIM-SSM uses the same DR election mechanism as in IPv6 PIM-SM. For more information, see
election."
SPT building
Whether to build an RPT for IPv6 PIM-SM or an SPT for IPv6 PIM-SSM depends on whether the IPv6
multicast group that the receiver will join falls in the IPv6 SSM group range. The IPv6 SSM group range
that IANA has reserved is FF3x::/32, where x represents any legal address scope.
Figure 96 Building an SPT in IPv6 PIM-SSM
As shown in
report message to the respective DRs to announce that they are interested in the information of the specific
IPv6 multicast source S and that sent to the IPv6 multicast group G.
The DR that has received the report first determines whether the IPv6 group address in this message falls
in the IPv6 SSM group range:
If so, the IPv6 PIM-SSM model is built. The DR sends a channel subscription message hop by hop
toward the IPv6 multicast source S. An (S, G) entry is created on all routers on the path from the DR
to the source. Thus, an SPT is built in the network, with the source S as its root and receivers as its
leaves. This SPT is the transmission channel in IPv6 PIM-SSM.
If not, the DR follows the IPv6 PIM-SM process. The DR sends a (*, G) join message to the RP, and an
IPv6 multicast source registration process is needed.
In IPv6 PIM-SSM, the term channel refers to an IPv6 multicast group, and the term channel subscription
refers to a join message.

Configuring IPv6 PIM-DM

In an IPv6 PIM network, IPv6 PIM-DM cannot work with IPv6 PIM-SM, IPv6 BIDIR-PIM, or IPv6 PIM-SSM.
However, IPv6 PIM-SM, IPv6 BIDIR-PIM, and IPv6 PIM-SSM can work together. When they work together,
which one is chosen for a receiver trying to join a group depends, as shown in
Figure
96, Hosts B and C are IPv6 multicast information receivers. They send an MLDv2
311
"DR
Figure
97.

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