H3C Technologies H3C S7500E Series Switches - Manual (Page 402)

13-51
Solution
1) Check that a route is available to the RP. Carry out the display ipv6 routing-table
command to check whether a route is available on each router to the RP.
2) Check the dynamic RP information. Use the display pim ipv6 rp-info command to check
whether the RP information is consistent on all routers. In the case of inconsistent RP
information, configure consistent RP address on all the routers.
3) Check the static RP configuration. Carry out the display pim ipv6 rp-info command to
check whether 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 register with the RP.
Analysis
z 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 will be unable to receive the advertisements from the
C-RP, and therefore the bootstrap messages of the BSR will not contain the information
about that C-RP.
z 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) Check whether routes to C-RPs, the RP and the BSR are available. Carry out the display
ipv6 routing-table command to check whether 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) Check the RP and BSR information. IPv6 PIM-SM needs the support of the RP and BSR.
Use the display pim ipv6 bsr-info command to check whether 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) View the IPv6 PIM neighboring relationships. Use the display pim ipv6 neighbor
command to check whether the normal neighboring relationships have been established
among the routers.