SMC Networks SMCGS10P-SMART Management Manual page 141

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.
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
last dynamic member port in the group, and the receiving port is not a
router port, the switch will generate and send a group-specific (GS)
query to the member port which received the leave message, and then
start the last member query timer for that port.
When the conditions in the preceding item all apply, except that the
receiving port is a router port, then the switch will not send a GS-query,
but will immediately start the last member query timer for that port.
Proxy Enabled - Configures the switch to issue MLD host report
◆
messages on behalf of hosts discovered through standard MLD
interfaces. (Default: Disabled)
When MLD proxy is enabled, the switch exchanges MLD messages with
the router on its upstream interface, and performs the host portion of
the MLD task on the upstream interface as follows:
When queried, it sends multicast listener reports to the group.
■
When a host joins a multicast group to which no other host belongs,
■
it sends unsolicited multicast listener reports to that group.
When the last host in a particular multicast group leaves, it sends
■
an unsolicited multicast listener done report to the all-routers
address (FF02::2) for MLDv1.
Port Related Configuration
◆ Port – Port identifier.
Router Port - Sets a port to function as a router port, which leads
◆
towards a Layer 3 multicast device or MLD querier. (Default: Disabled)
If MLD snooping cannot locate the MLD querier, you can manually
designate a port which is connected to a known MLD querier (i.e., a
multicast router/switch). This interface will then join all the current
multicast groups supported by the attached router/switch to ensure
that multicast traffic is passed to all appropriate interfaces within the
switch.
Fast Leave - Immediately deletes a member port of a multicast service
◆
if a leave packet is received at that port. (Default: Disabled)
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| Configuring the Switch
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HAPTER
MLD Snooping