H3C S5120-SI Series Command Reference Manual page 76

Parameters
ratio: Maximum percentage of unicast traffic to the total transmission capability of an Ethernet port, in
the range of 1 to 100. The smaller the ratio is, the less unicast traffic is allowed through the interface.
pps max-pps: Specifies the maximum number of unknown unicast packets passing through an Ethernet
port per second. The max-pps argument ranges from 1 to 1488100 (in pps, representing packets per
second).
kbps max-bps: Specifies the maximum number of unknown unicast kilobits passing through an
Ethernet port per second, The max-bps argument ranges from 1 to 1024000 (in kbps, representing
kilobits per second).
Description
Use the unicast-suppression command to configure a unicast storm suppression ratio.
Use the undo unicast-suppression command to restore the default unicast suppression ratio.
By default, unicast traffic is not suppressed.
If you execute this command in Ethernet port view, 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 unicast traffic exceeds the maximum value configured, the system will discard the extra
packets so that the unknown unicast traffic ratio can drop below the limit to ensure that the network
functions properly.
If you set different suppression ratios in Ethernet port view or port-group view repeatedly, the latest
configuration takes effect.
Do not use the unicast-suppression command along with the storm-constrain command.
Otherwise, the unicast storm suppression ratio configured may get invalid.
Examples
# For Ethernet port GigabitEthernet 1/0/1, allow unknown unicast traffic equivalent to 20% of the total
transmission capability of the interface to pass and suppress the excessive unknown unicast packets.
<Sysname> system-view
[Sysname] interface gigabitethernet 1/0/1
[Sysname-GigabitEthernet1/0/1] unicast-suppression 20
# For all the ports of the manual port group group1, allow unknown unicast traffic equivalent to 20% of
the total transmission capability of each port to pass and suppress excessive unknown unicast packets.
<Sysname> system-view
[Sysname] port-group manual group1
[Sysname-port-group-manual-group1] group-member gigabitethernet 1/0/1
[Sysname-port-group-manual-group1] group-member gigabitethernet 1/0/2
[Sysname-port-group-manual-group1] unicast-suppression 20
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