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3. Use the display pim ipv6 rp-info command to verify that the same RP address has been configured
on all the routers throughout the network.
RPT establishment failure or source registration failure in IPv6
PIM-SM
Symptom
C-RPs cannot unicast advertise messages to the BSR. The BSR does not advertise bootstrap messages
containing C-RP information and has no unicast route to any C-RP. An RPT cannot be established correctly,
or the DR cannot perform source registration with the RP.
Analysis
• C-RPs periodically send advertisement messages to the BSR by unicast. If a C-RP does not have a
route to the BSR, the BSR cannot receive the advertisements from the C-RP, and the bootstrap
messages of the BSR will not contain the information about that C-RP.
• The RP is the core of an IPv6 PIM-SM domain. Make sure that the RP information on all routers is
exactly the same, a specific group is mapped to the same RP, and a unicast route is available to the
RP.
Solution
1. Use the display ipv6 routing-table command to verify that routes are available on each router to
the RP and the BSR, and whether a route is available between the RP and the BSR. Make sure that
each C-RP has a unicast route to the BSR, the BSR has a unicast route to each C-RP, and all the
routers in the entire network have a unicast route to the RP.
2. IPv6 PIM-SM needs the support of the RP and BSR. Use the display pim ipv6 bsr-info command to
verify that the BSR information is available on each router, and then use the display pim ipv6
rp-info command to check whether the RP information is correct.
3. Use the display pim ipv6 neighbor command to verify that normal neighboring relationships have
been established among the routers.
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