H3C Technologies H3C SecPath F1000-E - Manual (Page 920)

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4. Verify that IPv6 PIM and MLD are enabled on the interfaces directly connecting to the IPv6
multicast source and to the receiver.
5. Use the display pim ipv6 interface verbose command to verify that the same PIM mode is enabled
on the RPF interface and the corresponding interface of the RPF neighbor router.
6. Use the display current-configuration command to verify that the same IPv6 PIM mode is enabled
on all the routers in the entire network. Make sure that the same IPv6 PIM mode is enabled on all
the routers: IPv6 PIM-SM on all routers, or IPv6 PIM-DM on all routers.
RPS cannot join SPT in IPv6 PIM-SM
Symptom
An RPT cannot be established correctly, or the RPs cannot join the SPT to the IPv6 multicast source.
Analysis
• As the core of an IPv6 PIM-SM domain, the RPs serves specific IPv6 multicast groups. Multiple RPs
can coexist in a network. Make sure that the RP information on all routers is exactly the same, and
a specific group is mapped to the same RP. Otherwise, IPv6 multicast will fail.
• In the case of the static RP mechanism, the same RP address must be configured on all the routers
in the entire network, including static RPs, by means of the static RP command. Otherwise, IPv6
multicast will fail.
Solution
1. Use the display ipv6 routing-table command to verify that 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 verify that 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. 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 register 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 therefore 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.