3com MSR 20-20 참조 매뉴얼

Use the undo multicast-suppression command to restore default multicast 
suppression ratio.

By default, all multicast traffic is allowed to go through an Ethernet interface, that 
is, multicast traffic is not suppressed.

If you execute this command in Ethernet interface view, the configuration takes 
effect only on the current interface. If you execute this command in port group 
view, the configuration takes effect on all ports in the port group.

Note that when multicast traffic exceeds the maximum value configured, the 
system will discard the extra packets so that the multicast traffic ratio can drop 
below the limit to ensure that the network functions properly.

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# Set the maximum multicast traffic allowed on Ethernet 1/0 to 5952 PPS.

<Sysname> system-view

[Sysname] interface ethernet 1/0

[Sysname-GigabitEthernet1/0] multicast-suppression pps 5952 

port-group { manual port-group-name | aggregation agg-id }

undo port-group manual port-group-name

System view

manual port-group-name: Specifies the name of a manual port group, a string of 
1 to 32 characters.

aggregation agg-id: Specifies the ID of an existing port aggregation group. You 
can use the display link-aggregation summary command to display the brief 
information of all the existing port aggregation groups. The support for this 
keyword-argument combination varies with device models.

Use the port-group manual command to create a manual port group and enter 
manual port group view.

Use the port-group aggregation command to enter aggregation group view.

Use the undo port-group manual command to remove a manual port group.

By default, no manual port group is created.

# Enter manual port group 1 view.

<Sysname> system-view

[Sysname] port-group manual group1