LevelOne GSW-4876 - Manual (Page 152)

C HAPTER 4 | Configuring the Switch
MLD Snooping
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If multicast routing is not supported on other switches in your network, you
can use MLD Snooping and Query to monitor MLD service requests passing
between multicast clients and servers, and dynamically configure the
switch ports which need to forward multicast traffic.
Multicast routers use information from MLD snooping and query reports,
along with a multicast routing protocol such as PIMv6, to support IP
multicasting across the Internet.
P ATH
Advanced Configuration, IPMC, MLD Snooping, Basic Configuration
P ARAMETERS
These parameters are displayed:
Global Configuration
◆ Snooping Enabled - When enabled, the switch will monitor network
traffic to determine which hosts want to receive multicast traffic.
(Default: Disabled)
This switch can passively snoop on MLD Listener Query and Report
packets transferred between IP multicast routers/switches and IP
multicast host groups to identify the IP multicast group members. It
simply monitors the MLD control packets passing through it, picks out
the group registration information, and configures the multicast filters
accordingly.
◆ Unregistered IPMCv6 Flooding Enabled - Floods unregistered
multicast traffic into the attached VLAN. (Default: Enabled)
Once the table used to store multicast entries for MLD snooping is
filled, no new entries are learned. If no router port is configured in the
attached VLAN, and Unregistered IPMCv6 Flooding is disabled, any
subsequent multicast traffic not found in the table is dropped,
otherwise it is flooded throughout the VLAN.
◆ MLD SSM Range - The Source-Specific Multicast Range allows SSM-
aware hosts and routers to run the SSM service model for groups in the
specified address range.
When downstream hosts request service from a specific source for a
multicast service, these sources are all placed in the Include list, and
traffic is forwarded to the hosts from each of these sources. MLD hosts
may also request that service be forwarded from any source except for
those specified. In this case, traffic is filtered from sources in the
Exclude list, and forwarded from all other available sources.
◆ Leave Proxy Enabled - Suppresses leave messages unless received
from the last member port in the group. (Default: Disabled)
MLD leave proxy suppresses all unnecessary MLD leave messages so
that a non-querier switch forwards an MLD leave packet only when the
last dynamic member port leaves a multicast group.
The leave-proxy feature does not function when a switch is set as the
querier. When the switch is a non-querier, the receiving port is not the