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XG Series User's Guide Chapter 4 Switch Functions and their Configuration
IGMP Snooping
79
4.8.2 Removing Group Members
The group members registered by IGMP snooping are removed under the following status.
• If after receiving an IGMP Report message for group registration, the group member interval expires before the device
receives another IGMP Report message, the switch removes the host from the group member. The setting for the group
member interval is 260 seconds.
• If an IGMP Leave message is sent from a host, the multicast router sends out an IGMP Specific Query (GSQ) message
to determine whether that the host has left the group.
• If after receiving the IGMP Leave message, the last member interval expires before the device receives another IGMP
Report message, the switch removes the host from the group member. The setting for the last member interval is 2
seconds.
Note
The registered Multicast Group IP is not detete form the IGMP snooping Control Table automatically.
Please use "clear igmpsnoop group" command to delete it.
XG
Removing Group Members (1)
Multicast Router
Terminal 1
Port 3
VLAN 10
Port 8
IGMP Leave
MAC : 0100.5E00.0002
Destination IP : 224.0.0.2
Group IP : 239.1.2.3
IGMP Leave
MAC
Destination IP
Source IP
Group IP
Terminal 2 Terminal 3
Port 2
Port 1
: 0100.5E00.0002
: 224.0.0.2
: 192.168.10.20
: 239.1.2.3
1, 8
Port
0100.0501.0203
MAC Address Table
Port(MAC address)
(01:00:05:01:02:03)
IGMP snooping Control Table
VLAN(RouterPort)
VLAN
10 (8)
239.1.2.3
1
Reporter
192.168.10.20
Group IP
XG
Multicast Router
VLAN 10
Port 8
IGMP Specific Query
MAC : 0100.5E01.0203
Destination IP : 239.1.2.3
Group IP : 239.1.2.3
IGMP Specific Query
MAC : 0100.5E01.0203
Destination IP : 239.1.2.3
Group IP : 239.1.2.3
Terminal 1 Terminal 2
Terminal 3
Port 1
Port 2
Port 3
Removing Group Members (2)
1, 8
Port
0100.0501.0203
MAC Address Table
1 192.168.10.20
Group IP
Port(MAC address)
(01:00:05:01:02:03)
IGMP snooping Control Table
VLAN(RouterPort)
VLAN
10 (8)
239.1.2.3
Reporter