3Com Baseline 2928 PWR Plus User Manual page 296

Figure 1-13 Configure IGMP snooping on GigabitEthernet 1/0/3.
Select GigabitEthernet 1/0/3 from the Port drop-down list.
Type the VLAN ID 100.
Select the Enable radio buttion for Fast Leave.
Click Apply to complete the operation.
Configuration verification
# Display the IGMP snooping multicast entry information on Switch A.
Select Network > IGMP Snooping in the navigation tree to enter the basic configuration page.
Click the plus sign (+) in front of Show Entries in the basic VLAN configuration page to display
information about IGMP snooping multicast entries, as shown in
1-14
Figure 1-14.