Huawei Quidway S3900 Series Operation Manual page 434

Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
Make sure that the unicast routing is right before troubleshooting PIM.
Because PIM-SM needs the support of RP and BSR, you must execute the
display pim bsr-info command to see whether BSR information exists. If not, you
must check whether there are unicast routes to the BSR. Then use the display
pim rp-info command to check whether the RP information is right. If RP
information does not exist, you must check whether there are unicast routes to RP.
Use the display pim neighbor command to check whether the neighboring
relationship is correctly established.
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Chapter 7 PIM Configuration