Static Rp; Bsrs - Cisco Nexus 7000 Series Configuration Manual

Static RP

Static RP
You can statically configure an RP for a multicast group range. You must configure the address of the RP on
every router in the domain.
You can define static RPs for the following reasons:
• To configure routers with the Anycast-RP address
• To manually configure an RP on a device
For information about configuring static RPs, see Configuring Static RPs.

BSRs

The bootstrap router (BSR) ensures that all routers in the PIM domain have the same RP cache as the BSR.
You can configure the BSR to help you select an RP set from BSR candidate RPs. The function of the BSR
is to broadcast the RP set to all routers in the domain. You select one or more candidate BSRs to manage the
RPs in the domain. Only one candidate BSR is elected as the BSR for the domain.
Caution Do not configure both Auto-RP and BSR protocols in the same network.
This figure shows the BSR mechanism. Router A, the software-elected BSR, sends BSR messages out all
enabled interfaces (shown by the solid lines in the figure). The messages, which contain the RP set, are flooded
hop by hop to all routers in the network. Routers B and C are candidate RPs that send their candidate-RP
advertisements directly to the elected BSR (shown by the dashed lines in the figure).
The elected BSR receives candidate-RP messages from all the candidate RPs in the domain. The bootstrap
message sent by the BSR includes information about all of the candidate RPs. Each router uses a common
algorithm to select the same RP address for a given multicast group.
Figure 14: BSR Mechanism
Cisco Nexus 7000 Series NX-OS Multicast Routing Configuration Guide
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Configuring PIM and PIM6