HP E4510-48G Command Reference Manual page 90

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 unicast
suppression threshold value configured through this keyword on an Ethernet port may not be the
one that actually takes effect. To display the actual unicast suppression threshold value on an
Ethernet port, 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 keyword should be no smaller than 1, and the unicast suppression threshold value is
the one that actually takes effect on the Ethernet port.
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, all unicast traffic is allowed to go through an Ethernet port, that is, 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 1/0/5
[Sysname-port-group-manual-group1] group-member GigabitEthernet 1/0/6
[Sysname-port-group-manual-group1] unicast-suppression 20
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