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DGS-3120 Series Layer 3 Managed Gigabit Ethernet Switch CLI Reference Guide
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To show IGMP snooping groups when only IGMP v2 is supported: The third item is a data-driven
learned entry. If the member port list is empty, the multicast packets will be forwarded to the router
ports. If the router port list is empty, the packets will be dropped.
DGS-3120-24TC:admin# show igmp_snooping group
Command: show igmp_snooping group
Source/Group : NULL/226.0.0.1
VLAN Name/VID : default/1
Member Ports : 1:5
UP Time : 10
Expiry Time : 258
Filter Mode : EXCLUDE
Source/Group : NULL/226.0.0.2
VLAN Name/VID : default/1
Member Ports : 1:5
UP Time : 9
Expiry Time : 259
Filter Mode : EXCLUDE
Source/Group : NULL/226.0.0.3
VLAN Name/VID : default/1
Member Ports :
Router Ports :
UP Time : 1
Expiry Time : 259
Filter Mode : EXCLUDE
Source/Group : NULL/239.255.255.250
VLAN Name/VID : default/1
Member Ports : 1:5
UP Time : 1
Expiry Time : 259
Filter Mode : EXCLUDE
Total Entries: 4
42-19 show igmp_snooping forwarding
Description
This command is used to display the Switch’s current IGMP snooping forwarding table. It provides
an easy way for users to check the list of ports that the multicast group that comes from a specific
sources will be forwarded to. The packet comes from the source VLAN. They will be forwarded to
the forwarding VLAN. The IGMP snooping further restricts the forwarding ports.
Format
show igmp_snooping forwarding {[vlan <vlan_name 32> | vlanid <vlanid_list>]}
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