Configuring Mld Snooping Querier; Configuration Prerequisites; Enabling Mld Snooping Querier - H3C S5120-EI Series Operation Manual

Configuring fast leave processing on a port or a group of ports
Follow these steps to configure fast leave processing on a port or a group of ports:
To do...
Enter system view
Enter Ethernet port/Layer 2
aggregate port view or port
group view
Enable fast leave processing
If fast leave processing is enabled on a port to which more than one host is connected, when one host
leaves an IPv6 multicast group, the other hosts connected to port and interested in the same IPv6
multicast group will fail to receive IPv6 multicast data addressed to that group.

Configuring MLD Snooping Querier

Configuration Prerequisites

Before configuring MLD Snooping querier, complete the following task:
Enable MLD Snooping in the VLAN.
Before configuring MLD Snooping querier, prepare the following data:
MLD general query interval,
MLD last-member query interval,
Maximum response time for MLD general queries,
Source IPv6 address of MLD general queries, and
Source IPv6 address of MLD multicast-address-specific queries.

Enabling MLD Snooping Querier

In an IPv6 multicast network running MLD, a multicast router or Layer 3 multicast switch is responsible
for sending periodic MLD general queries, so that all Layer 3 multicast devices can establish and
maintain multicast forwarding entries, thus to forward multicast traffic correctly at the network layer. This
router or Layer 3 switch is called MLD querier.
However, a Layer 2 multicast switch does not support MLD, and therefore cannot send MLD general
queries by default. By enabling MLD Snooping querier on a Layer 2 switch in a VLAN where multicast
traffic needs to be Layer-2 switched only and no Layer 3 multicast devices are present, the Layer 2
switch will act as the MLD querier to send periodic MLD queries, thus allowing multicast forwarding
entries to be established and maintained at the data link layer.
Follow these steps to enable the MLD Snooping querier:
Use the command...
system-view
interface interface-type
interface-number
port-group manual port-group-name
mld-snooping fast-leave [ vlan
vlan-list ]
1-11
Remarks
—
Required
Use either approach
Required
Disabled by default