D-Link xStack DGS-3420 Series Reference Manual page 670

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To clear the MLD snooping group learned by data driven:
DGS-3420-28SC:admin#clear mld_snooping data_driven_group all
Command: clear mld_snooping data_driven_group all
Success.
DGS-3420-28SC:admin#
58-20 config mld_snooping data_driven_learning
Description
This command is used to enable or disable the data driven learning of a MLD snooping group. When
the data-driven learning is enabled for the VLAN, when the switch receives the IP multicast traffic, on
this VLAN, an MLD snooping group will be created. That is, the learning of an entry is not activated by
MLD membership registration, but activated by the traffic. For an ordinary MLD snooping entry, the
MLD protocol will take care the aging out of the entry. For a data-driven entry, the entry can be
specified not to be age out or to be aged out by the aged timer. When the data driven learning is
enabled, and data driven table is not full, the multicast filtering mode for all ports are ignored. That is,
the multicast packets will be forwarded to router ports. If data driven learning table is full, the multicast
packets will be forwarded according to multicast filtering mode.
Note that if a data-driven group is created and MLD member ports are learned later, the entry will
become an ordinary MLD snooping entry. That is, the aging out mechanism will follow the ordinary
MLD snooping entry.
Format
config mld_snooping data_driven_learning [all | vlan_name <vlan_name 32> | vlanid
<vlanid_list>] {state [enable | disable] | aged_out [enable | disable] | expiry_time <sec 1-
65535>}(1)
Parameters
all - Specify to configure all VLANs and VLAN IDs.
vlan_name - Specify the VLAN name to be configured.
<vlan_name> - Specify the VLAN name.
vlanid - Specify the VLAN ID to be configured.
<vlanid_list> - Specify a list of VLAN IDs.
state - Specify whether to enable or disable the data driven learning of an MLD snooping group.
This is enabled by default.
enable - Enable data driven learning of an MLD snooping group.
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