R3102-R3103-HP 6600/HSR6600 Routers IP Multicast Configuration Guide

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3. Use the display pim ipv6 neighbor command to verify that the RPF neighbor is an IPv6 PIM
neighbor.
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 the IPv6 PIM mode information on each
interface. Make sure the same IPv6 PIM mode (IPv6 PIM-SM or IPv6 PIM-DM) is enabled on all
routers.
RPs cannot join the 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 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 to the RP is available on each
router.
2. Use the display pim ipv6 rp-info command to verify that the dynamic RP information is consistent
on all routers. In case of inconsistent RP information, configure consistent RP address on all the
routers.
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 cannot be established or a source cannot register 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 do not contain the information about that C-RP.
• The RP is the core of an IPv6 PIM-SM domain. Make sure 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.