The c-bsr admin-scope command configures a BSR administrative scope in a PIM-SM domain.
The undo c-bsr admin-scope command restores the default configuration.
Usage Scenario
By default, each PIM-SM domain has only one BSR and the BSR serves all the devices in the entire PIM-SM domain. To achieve more effective management, you can divide a PIM-SM domain into multiple BSR administrative domains and a global domain. This can reduce the workload of a single BSR and designate a private-network group address for users in a specific domain.
Each BSR administrative domain maintains one BSR that serves multicast groups on network segment 239.0.0.0/8. Multicast packets for groups on this network segment cannot pass through the border of the BSR administrative domain. Multicast groups that do not belong to any BSR administrative domain belong to a global domain. The global domain maintains a BSR, serving all the remained multicast groups, namely, multicast groups beyond the range 239.0.0.0/8.
A BSR administrative domain is similar to a VPN in unicast and multicast address segment 239.0.0.0/8 equals unicast address segment 10.0.0.0/8. Other multicast group addresses can be used on the public network and address conflicts need be avoided. If a PIM-SM domain is divided into different BSR administrative domains, each BSR administrative domain equals a VPN, serving the multicast groups on the network segment 239.0.0.0/8. You can use the same multicast group address in different BSR administration domains.
Prerequisites
The multicast routing-enable command has been run.
Configuration Impact
After the undo pim command or the undo multicast routing-enable command is run in the system view, the BSR administrative domain is automatically disabled.
Precautions
The c-bsr admin-scope command needs to be run on all the devices in a PIM-SM domain.