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Routing & Switching · Advanced

Anycast RP

Configuring the same RP address on multiple routers for redundancy and load sharing, synchronized by MSDP or PIM.

Definition

Routers send joins and registers to the nearest RP instance by unicast routing. Sources registered at one RP are shared with others through MSDP SA messages (RFC 3446) or PIM register forwarding (RFC 4610).

Example

Two RPs both use Loopback1 10.255.255.1 and peer via MSDP.

Exam tip

Anycast RP provides sub-second RP failover tied to IGP convergence.

Related terms