H3C Technologies H3C S10500 Series Switches - Manual (Page 359)

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Follow these steps to enable MLD proxying:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable the MLD proxying feature mld proxying enable
Required
Disabled by default.
NOTE:
•
Each device can have only one interface serving as the MLD proxy interface.
• You cannot enable MLD on interfaces with MLD proxying enabled. Moreover, only the mld
require-router-alert, mld send-router-alert, and mld version commands can take effect on such
interfaces.
• You cannot enable other IPv6 multicast routing protocols (such as IPv6 PIM-DM or IPv6 PIM-SM) on
interfaces with MLD proxying enabled, or vice versa. However, the source-lifetime, source-policy, and
ssm-policy commands configured in IPv6 PIM view can still take effect.
• You cannot enable MLD proxying on a VLAN interface with MLD snooping enabled, or vice versa.
Configuring IPv6 multicast forwarding on a downstream
interface
Typically, to avoid duplicate multicast flows, only queriers can forward IPv6 multicast traffic. On MLD
proxy devices, a downstream interface must be a querier in order to forward IPv6 multicast traffic to
downstream hosts. If the interface has failed in the querier election, you must manually enable IPv6
multicast forwarding on this interface.
Follow these steps to enable IPv6 multicast forwarding on a downstream interface
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable IPv6 multicast forwarding on a
non-querier downstream interface
mld proxying forwarding
Required
Disabled by default.
CAUTION:
On a multi-access network with more than one MLD proxy devices, you cannot enable IPv6 multicast
forwarding on any other non-querier downstream interface after one of the downstream interfaces of
these MLD proxy devices has been elected as the querier. Otherwise, duplicate multicast flows might be
received on the multi-access network.