3Com S7906E Command Reference Manual page 107

Default Level
2: System level
Parameters
ratio: Maximum percentage of multicast traffic to the total transmission capability of an Ethernet
interface, in the range 1 to 100. The smaller the ratio is, the less multicast traffic is allowed to pass
through the interface.
pps max-pps: Specifies the maximum number of multicast packets allowed on the Ethernet interface(s)
per second...
For a 100-Mbps port, this value ranges from 1 to 148810 (in pps).
For a 1-Gbps port, this value ranges from 1 to 1488100 (in pps).
For a 10-Gbps port, this value ranges from 1 to 14881000 (in pps).
Note that:
When a suppression granularity larger than 1 is specified on the device, the value of the pps
keyword should be no smaller than and an integral multiple of the granularity. The broadcast
suppression threshold value configured through this keyword on an Ethernet interface may not be
the one that actually takes effect. To display the actual broadcast suppression threshold value on
an Ethernet interface, you can use the display interface command.
When no suppression granularity is specified or the suppression granularity is set to 1, the value of
the pps or keyword should be no smaller than 1, and the broadcast suppression threshold value is
the one that actually takes effect on the Ethernet interface.
Description
Use the multicast-suppression command to configure multicast storm suppression ratio on an
interface.
Use the undo multicast-suppression command to restore the 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, the configurations take effect only on the current
interface. If you execute this command in port-group view, the configurations take 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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