Owner's Manual

Chapter 29. MSDP | 762
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29. MSDP
This chapter includes the following sections:
• Overview on page 762
• PIM Border Configuration on page 763
• MSDP Peers on page 764
• MSDP Mesh-Groups on page 766
• Anycast RP on page 767
• SA Cache on page 768
• Redundancy on page 770
• Scaling Limits on page 770
• SNMP MIBs on page 770
• Configuration Examples on page 770
Note: For more information about MSDP, see RFC 3618.
Overview
Multicast Source Discovery Protocol (MSDP) is an interdomain multicast protocol used to
connect multiple multicast routing domains that run Protocol Independent Multicast-Sparse
Mode (PIM-SM). MSDP speakers are configured on each PIM-SM domain. These speakers
establish a peering relationship with other MSDP speakers through secured TCP connections.
When the source sends traffic, the MSDP speaker learns about the source through its
Rendezvous Point (RP). In turn, the RP advertises the source to its peers through Source Active
(SA) messages. The peers receive these advertisements and inform their RPs about the
presence of the active source in the other PIM-SM domain, which triggers the normal PIM
operation in the corresponding domains.