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DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch CLI Reference Guide
450
42-13 config igmp_snooping data_driven_learning (EI and SI Mode
Only)
Description
This command is used to enable or disable the data driven learning of an IGMP snooping group.
When data-driven learning is enabled for the VLAN, when the Switch receives the IP multicast
traffic on this VLAN, an IGMP snooping group will be created. That is, the learning of an entry is
not activated by IGMP membership registration, but activated by the traffic. For an ordinary IGMP
snooping entry, the IGMP protocol will take care of the aging out of the entry. For a data-driven
entry, the entry can be specified not to be aged out or to be aged out by the aged timer.
When data driven learning is enabled, and the data driven table is not full, the multicast filtering
mode for all ports is ignored. That is, the multicast packets will be forwarded to router ports. If the
data driven learning table is full, the multicast packets will be forwarded according to the multicast
filtering mode.
Note that if a data-driven group is created and IGMP member ports are learned later, the entry will
become an ordinary IGMP snooping entry. That is, the aging out mechanism will follow the
ordinary IGMP snooping entry.
Format
config igmp_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
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