Sa Messages And Caching - Cisco Nexus 7000 Series Configuration Manual

SA Messages and Caching

Figure 18: MSDP Peering Between RPs in Different PIM Domains
When you configure MSDP peering between each RP, you create a full mesh. Full MSDP meshing is typically
done within an autonomous system, as shown between RPs 1, 2, and 3, but not across autonomous systems.
You use BGP to do loop suppression and MSDP peer-RPF to suppress looping SA messages.
Note
You do not need to configure BGP in order to use Anycast-RP (a set of RPs that can perform load balancing
and failover) within a PIM domain.
Note You can use PIM Anycast (RFC 4610) to provide the Anycast-RP function instead of MSDP. For information
about PIM, see Configuring PIM and PIM6.
For detailed information about MSDP, see
SA Messages and Caching
MSDP peers exchange Source-Active (SA) messages to propagate information about active sources. SA
messages contain the following information:
• Source address of the data source
• Group address that the data source uses
• IP address of the RP or the configured originator ID
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
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RFC 3618.
Configuring MSDP