HP MSR2003 Configuration Manual page 152

The following describes how Anycast RP through MSDP is implemented:
a. After receiving the multicast data from Source, the source-side DR registers with the nearest RP
(RP 1 in this example).
b. After receiving the IGMP report message from the receiver, the receiver-side DR sends a join
message toward the nearest RP (RP 2 in this example). Therefore, an RPT rooted at this RP is
established.
c. The RPs share the registered multicast source information through SA messages. After
obtaining the multicast source information, RP 2 sends an (S, G) source-specific join message
toward the source to create an SPT.
d. When the multicast data reaches RP 2 along the SPT, the RP forwards the data along the RPT
to the receiver. After receiving the multicast data, the receiver-side DR determines whether to
initiate an RPT-to-SPT switchover process based on its configuration.
MSDP peer-RPF forwarding
The MSDP peer-RPF check is used for forwarding SA messages on a network that runs MSDP. If the
peer-RPF check succeeds, the SA message is accepted and forwarded. Otherwise, the SA message is
discarded.
As shown in
There are five ASs on the network. IGP runs within each AS, and BGP or MBGP runs between these
•
ASs.
Each AS contains at least one PIM-SM domain, and each PIM-SM domain contains at least one RP.
•
MSDP peering relationship has been established among these RPs.
•
RP 3, RP 4, and RP 5 are in the same MSDP mesh group.
RP 6 is configured as the static RPF peer of RP 7.
Figure 50 Anycast RP through MSDP
Figure 51:
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