Application Scenarios for MSDP

Inter-Domain Multicast

Figure 1 shows an inter-domain multicast application.
  • An MSDP peer relationship is set up between rendezvous points (RPs) in two different PIM-SM domains. Multicast source information can then be shared between the two domains.

  • After multicast data reaches RP 1 (the source's RP), RP 1 sends a source active (SA) message that carries the multicast source information to RP 2.

  • RP 2 initiates a shortest path tree (SPT) setup request to the source.

  • RP 2 forwards the multicast data to the receiver in the local domain.

  • After Receiver receives the multicast data, it independently determines whether to initiate an SPT switchover.

Figure 1 Inter-domain multicast within an AS


Figure 2 shows an Anycast-RP application.
  • Device 1 and Device 2 function as RPs and establish an MSDP peer relationship between each other.

  • Intra-domain multicast is performed using this MSDP peer relationship. A receiver sends a Join message to the nearest RP to set up a rendezvous point tree (RPT).

  • The multicast source registers with the nearest RP. RPs exchange SA messages to share the multicast source information.

  • Each RP joins an SPT with the source's DR at the root.

  • After receiving the multicast data, the receiver decides whether to initiate an SPT switchover.

Figure 2 Anycast-RP

Copyright © Huawei Technologies Co., Ltd.
Copyright © Huawei Technologies Co., Ltd.
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