H3C Technologies H3C S10500 Series Switches - Manual (Page 314)

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other types of received IPv6 PIM messages in the VLAN, and forwards all multicast data to all router
ports in the VLAN. Each IPv6 PIM-capable router in the VLAN, whether interested in the multicast
data or not, will receive all multicast data and all IPv6 PIM messages except for IPv6 PIM hello
messages.
• If the Layer 2 switch runs both MLD snooping and IPv6 PIM snooping, it determines whether an IPv6
PIM-capable router is interested in the multicast data destined for a multicast group according to the
received IPv6 PIM messages that the router sends, and adds the port that connects to the router to
a multicast forwarding entry. Then, the Layer 2 switch can correctly forward IPv6 PIM messages and
the multicast data only to the router according to the multicast forwarding entry, saving network
bandwidth.
NOTE:
•
For more information about MLD snooping and the router port, see the chapter “MLD snooping
configuration.”
• For more information about IPv6 PIM, see the chapter “IPv6 PIM configuration.”
Configuring IPv6 PIM snooping
Before you configure IPv6 PIM snooping for a VLAN, you must enable IPv6 forwarding and MLD
snooping globally and enable MLD snooping in the VLAN.
Follow these steps to configure IPv6 PIM snooping:
To do… Use the command… Remarks
Enter system view system-view —
Enable IPv6 forwarding globally ipv6
Required
Disabled by default.
Enable MLD snooping globally
and enter MLD-snooping view
mld-snooping
Required
Disabled by default.
Return to system view quit —
Enter VLAN view vlan vlan-id —
Enable MLD snooping in the
VLAN
mld-snooping enable
Required
Disabled by default.
Enable IPv6 PIM snooping in the
VLAN
pim-snooping ipv6 enable
Required
Disabled by default.