An RPT cannot be built or multicast source registration fails in PIM-SM
Symptom
The C-RPs cannot unicast advertisement messages to the BSR. The BSR does not advertise BSMs containing C-RP information and has no unicast route to any C-RP. An RPT cannot be correctly established, or the source-side DR cannot register the multicast source with the RP.
Solution
To resolve the problem:
Use display ip routing-table on each device to view routing table information. Verify that unicast routes to the C-RPs and the BSR are available on each device and that a route is available between each C-RP and the BSR.
Use display pim bsr-info to verify that the BSR information exists on each device.
Use display pim rp-info to verify that the RP information is correct on each device.
Use display pim neighbor to verify that PIM neighboring relationship has been correctly established among the devices.
If the problem persists, contact Hewlett Packard Enterprise Support.