Chapter 5. Multicast Source Discovery Protocol (MSDP)
This chapter describes MSDP in depth. MSDP establishes a mechanism to connect xmultiple PIM-SM domains. With MSDP, each PIM-SM domain has its own RP and does not rely on the RP of another organization's network.
Introduction
In PIM-SM, the RP is configured to serve a range of multicast groups. The RP is responsible for knowing all of the active sources of all multicast groups in this range. There can be only one active RP for a given group. This requirement of PIM-SM presents interesting challenges when trying to support redundancy, load balancing, and interdomain connectivity. MSDP was developed to address these challenges.
Before MSDP, one technique for achieving IMR was to connect each ISP's ...
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