H3C Technologies H3C S7500E Series Switches - Manual (Page 264)

9-8
Processing of IPv6 Multicast Protocol Messages
With Layer 3 multicast routing enabled, an MLD snooping switch processes IPv6 multicast
protocol messages differently under different conditions, specifically as follows:
1) If only MLD is enabled, or both MLD and IPv6 PIM are enabled on the switch, the switch
handles IPv6 multicast protocol messages in the normal way.
2) In only IPv6 PIM is enabled on the switch:
z The switch broadcasts MLD messages as unknown messages in the VLAN.
z Upon receiving an IPv6 PIM hello message, the switch will maintain the corresponding
dynamic router port.
3) When MLD is disabled on the switch:
z If IPv6 PIM is disabled, the switch deletes all its dynamic member ports and dynamic router
ports.
z If IPv6 PIM is enabled, the switch deletes only its dynamic member ports without deleting
its dynamic router ports.
On a switch with Layer-3 IPv6 multicast routing enabled, use the display mld group port-info
command to view Layer-2 port information.
For details about the display mld group port-info command, refer to MLD Configuration
Commands in the IP Multicast Command Reference.
4) When IPv6 PIM is disabled on the switch:
z If MLD is disabled, the switch deletes all its dynamic router ports.
z If MLD is enabled, the switch maintains all its dynamic member ports and dynamic router
ports.
Protocols and Standards
MLD snooping is documented in:
z RFC 4541: Considerations for Internet Group Management Protocol (IGMP) and Multicast
Listener Discovery (MLD) Snooping Switches
MLD Snooping Configuration Task List
Complete these tasks to configure MLD snooping:
Task Remarks
Enabling MLD Snooping Required Configuring Basic Functions
of MLD Snooping
Configuring the Version of MLD Snooping Optional