H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 15)

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NOTE:
When you want to perform storm control for different type of packets, you can configure a suppression
threshold ratio or use the storm-constrain command to configure storm control for each type of packets.
However, when you want to perform storm control for the same type of packets, you cannot use the two
methods at the same time; otherwise, the storm control result may be not as expected.
Follow these steps to set storm suppression thresholds on one or multiple Ethernet interfaces:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet
interface view
or port group
view
Enter Ethernet
interface view interface interface-type
interface-number Use either command.
To configure storm suppression
on an Ethernet interface, enter
Ethernet interface view.
To configure storm suppression
on a group of Ethernet interfaces,
enter port group view.
Enter port
group view
port-group manual port-group-name
Set the broadcast suppression
threshold ratio broadcast-suppression { ratio | pps
max-pps | kbps max-kbps }
Optional
By default, broadcast traffic is
not suppressed.
Set the multicast suppression
threshold ratio multicast-suppression { ratio | pps
max-pps | kbps max-kbps }
Optional
By default, multicast traffic is not
suppressed.
Set the unknown unicast
suppression threshold ratio unicast-suppression { ratio | pps
max-pps | kbps max-kbps }
Optional
By default, unknown unicast
traffic is not suppressed.
NOTE:
For an Ethernet interface that belongs to a port group, if you set a traffic suppression threshold for the
interface in both Ethernet interface view and port group view, the threshold configured last takes effect.
Configuring storm control on an Ethernet interface
Storm control compares broadcast, multicast, and unknown unicast traffic regularly with their respective
traffic thresholds on an Ethernet interface. For each type of traffic, storm control provides a lower
threshold and a higher threshold.
For management purposes, you can configure the interface to send threshold event traps and log
messages when monitored traffic exceeds the upper threshold or falls below the lower threshold from the
upper threshold.
When a particular type of traffic exceeds its upper threshold, the interface does either of the following,
depending on your configuration:
• Blocks this type of traffic, while forwarding other types of traffic. Even though the interface does not
forward the blocked traffic, it still counts the traffic. When the blocked traffic is detected dropping
below the lower threshold, the port begins to forward the traffic.