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3Com Switch 7750 Series
Command Reference Guide — Basic Port Commands Chapter 1 Port Basic Configuration Commands
1-21
z 1 to 100 for 100 Mbps Ethernet ports;
z 1 to 1,000 Mbps for Gigabit Ethernet ports;
z 1 to 10,000 Mbps for 10 GE ports.
kbps kbps-value: Specifies the maximum bandwidth (in Kbps) for receiving multicast
traffic, in the range of 64 to 1,024,000 in the step of 64.
max-pps: Maximum number of multicast packets allowed to be received per second on
the Ethernet port (in pps). The range of the max-pps argument depends on the port
type.
z 1 to 148,810 for 100 Mbps Ethernet ports;
z 1 to 1,488,100 for Gigabit Ethernet ports;
z 1 to 262,143 for 10 GE ports.
Description
Use the multicast-suppression command to limit multicast traffic allowed to be
received on the current port.
Use the undo multicast-suppression command to restore the default multicast
suppression setting on the current port.
When incoming multicast traffic on the port exceeds the multicast traffic threshold you
set, the system drops the packets exceeding the threshold to reduce the multicast
traffic ratio to the reasonable range, so as to keep normal network service.
By default, the switch does not suppress multicast traffic.
Caution:
Note that type-A LPUs (including 3C16860, 3C16861, 3C16858, and 3C16859) do not
support enabling multicast suppression on a port.
Example
# Allow the incoming multicast traffic on the Ethernet1/0/1 port to occupy at most 20%
of the bandwidth on the port.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] interface ethernet 1/0/1
[3Com-Ethernet1/0/1] multicast-suppression 20
# Set the maximum number of multicast packets that can be forwarded per second by
the Ethernet1/0/1 port to 1000 pps.
[3Com-Ethernet1/0/1] multicast-suppression pps 1000