HP 5920 series Configuration Manual page 119

Host A and Host C are permanent receivers of the IPv6 multicast group FF1E::101. Configure
Ten-GigabitEthernet 1/0/3 and Ten-GigabitEthernet 1/0/5 on Switch C as static member ports for the
IPv6 multicast group FF1E::101 to enhance the reliability of IPv6 multicast traffic transmission.
Suppose the STP runs on the network. To avoid data loops, the forwarding path from Switch A to Switch
C is blocked under normal conditions, and IPv6 multicast data flows to the receivers attached to Switch
C only along the path of Switch A—Switch B—Switch C.
Configure Ten-GigabitEthernet 1/0/3 on Switch A as a static router port, so that IPv6 multicast data can
flow to the receivers nearly uninterrupted along the path of Switch A—Switch C when the path of Switch
A—Switch B—Switch C is blocked.
NOTE:
If no static router port is configured, when the path of Switch A—Switch B—Switch C is blocked, at least
one MLD query-response cycle must be completed before the IPv6 multicast data can flow to the receivers
along the new path of Switch A—Switch C. IPv6 multicast delivery is interrupted during this process.
For more information about the STP, see Layer 2—LAN Switching Configuration Guide.
Figure 38 Network diagram
Configuration procedure
Assign an IPv6 address and prefix length to each interface according to
1.
shown.)
On Router A, enable IPv6 multicast routing, enable MLD on Ten-GigabitEthernet 1/0/1, and
2.
enable IPv6 PIM-DM on each interface.
<RouterA> system-view
[RouterA] ipv6 multicast routing-enable
[RouterA] interface ten-gigabitethernet 1/0/1
[RouterA-Ten-GigabitEthernet1/0/1] mld enable
[RouterA-Ten-GigabitEthernet1/0/1] ipv6 pim dm
[RouterA-Ten-GigabitEthernet1/0/1] quit
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Figure 38. (Details not