HP A5500 SI Switch Series Configuration Manual page 291

NOTE:
On a switch with Layer-3 IPv6 multicast routing enabled, use the display mld group port-info
command to display Layer-2 port information. For more information about this command, see the
Multicast Command Reference
If IPv6 PIM is disabled on the switch, one of the following occurs:
4.
If MLD is disabled, the switch deletes all its dynamic router ports.
If MLD is enabled, the switch maintains all its dynamic member ports and dynamic router ports.
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