A multicast distribution tree cannot be correctly built
Symptom
No IPv6 multicast forwarding entries are established on the devices (including devices directly connected with multicast sources or receivers) in an IPv6 PIM network. This means that an IPv6 multicast distribution tree cannot be correctly built.
Solution
To resolve the problem:
Use display ipv6 routing-table to verify that an IPv6 unicast route to the IPv6 multicast source or the RP is available.
Use display ipv6 pim interface to verify IPv6 PIM information on each interface, especially on the RPF interface. If IPv6 PIM is not enabled on the interfaces, use ipv6 pim dm or ipv6 pim sm to enable IPv6 PIM-DM or IPv6 PIM-SM for the interfaces.
Use display ipv6 pim neighbor to verify that the RPF neighbor is an IPv6 PIM neighbor.
Verify that IPv6 PIM and MLD are enabled on the interfaces that directly connect to the IPv6 multicast sources or the receivers.
Use display ipv6 pim interface verbose to verify that the same IPv6 PIM mode is enabled on the RPF interface on a device and the connected interface of the device's RPF neighbor.
Use display current-configuration to verify that the same IPv6 PIM mode is enabled on all devices on the network. For IPv6 PIM-SM, verify that the BSR and C-RPs are correctly configured.
If the problem persists, contact Hewlett Packard Enterprise Support.