A BootStrap router (BSR) boundary can be configured on an interface. Bootstrap messages cannot pass the BSR boundary. Multiple BSR boundary interfaces divide the network into different PIM-SM domains.
Before configuring the BSR boundary, complete the following tasks:
Configuring a unicast routing protocol
interface interface-type interface-number
Bootstrap messages cannot pass the BSR boundary.
By default, all the PIM-SM devices on the network can receive Bootstrap messages.