H3C S5500-EI Series Operation Manual page 171

Operation Manual – Multicast
H3C S5500-EI Series Ethernet Switches
6) When RP 8 receives the SA message from RP 7
An EBGP route exists between two MSDP peers in different ASs. Because the SA
message is from an MSDP peer (RP 7) in a different AS, and the MSDP peer is the next
hop on the EBGP route to the source-side RP, RP 8 accepts the message and forwards
it to its other peer (RP 9).
7) When RP 9 receives the SA message from RP 8
Because RP 9 has only one MSDP peer, RP 9 accepts the SA message.
SA messages from other paths than described above will not be accepted nor
forwarded by MSDP peers.
IV. Implementing intra-domain Anycast RP by leveraging MSDP peers
Anycast RP refers to such an application that enables load balancing and redundancy
backup between two or more RPs within a PIM-SM domain by configuring the same IP
address for, and establishing MSDP peering relationships between, these RPs.
As shown in
data to multicast group G, and Receiver is a member of the multicast group. To
implement Anycast RP, configure the same IP address (known as anycast RP address,
typically a private address) on Router A and Router B, configure these interfaces as
C-RPs, and establish an MSDP peering relationship between Router A and Router B.
Note:
Usually an Anycast RP address is configured on a logic interface, like a loopback
interface.
Figure 8-4 Typical network diagram of Anycast RP
Figure 8-4, within a PIM-SM domain, a multicast source sends multicast
RP 1
Router A
Source
PIM-SM
MSDP peers
SA message
RP 2
Router B
Receiver
8-7
Chapter 8 MSDP Configuration