Before configuring PIM inter-domain multicast, configure BootStrap router (BSR) boundaries to divide a multicast network into different PIM-SM domains. Each BSR serves only the local PIM-SM domain, and routers outside the BSR boundary of a PIM-SM domain do not take part in BSR message forwarding in this PIM-SM domain.
After a BSR boundary is configured on the interface of an edge router in a PIM-SM domain, Bootstrap messages cannot pass through this interface. The interfaces configured with BSR boundaries divide the network into different PIM-SM domains.
BSR boundaries can also be used to isolate PIM-SM domains from the Internet.
Before configuring a BSR boundary, complete the following tasks:
Configure a unicast routing protocol to ensure that unicast routes are reachable.
Enable multicast routing on all routers and enable PIM-SM on all interfaces.
The system view is displayed.
The interface view is displayed.
A BSR boundary is configured. BSR messages cannot pass through the BSR boundary.
If incoming is specified, the local PIM-SM domain can send BSR messages to all other PIM-SM domains but cannot receive BSR messages from other PIM-SM domains.
The configuration is committed.
Run the display pim [ vpn-instance vpn-instance-name | all-instance ] bsr-info command to check BSR information in a PIM-SM domain.
Configure a BSR RP for each PIM-SM domain.
Set up MSDP peer relationships between RPs in PIM-SM domains and configure PIM-SM inter-domain multicast.