H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 16)

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• Shuts down automatically. The interface shuts down automatically and stops forwarding any traffic.
When the blocked traffic is detected dropping below the lower threshold, the port does not forward
the traffic. To bring up the interface, use the undo shutdown command or disable the storm control
function.
CAUTION:
Alternatively, you can configure the storm suppression function to control a specific type of traffic. Do not
enable them both on an Ethernet interface at the same time because the storm suppression and storm
control functions are mutually exclusive. For example, with an unknown unicast suppression threshold set
on an Ethernet interface, do not enable storm control for unknown unicast traffic on the interface. For more
information about storm suppression, see “ Configuring storm suppression .”
Follow these steps to configure storm control on an Ethernet interface:
To do… Use the command… Remarks
Enter system view system-view —
Set the traffic polling interval of the
storm control module
storm-constrain interval seconds
Optional
10 seconds by default.
Enter Ethernet interface view
interface interface-type
interface-number
—
Enable storm control, and set the
lower and upper thresholds for
broadcast, multicast, or unknown
unicast traffic
storm-constrain { broadcast |
multicast | unicast } pps
max-pps-values min-pps-values
Required
Disabled by default.
Set the control action to take when
monitored traffic exceeds the
upper threshold
storm-constrain control { block |
shutdown } Optional
Disabled by default.
Enable the interface to send storm
control threshold event traps.
storm-constrain enable trap
Optional
By default, the interface sends
traps when monitored traffic
exceeds the upper threshold or
drops below the lower threshold
from the upper threshold.
Enable the interface to log storm
control threshold events.
storm-constrain enable log
Optional
By default, the interface outputs log
messages when monitored traffic
exceeds the upper threshold or
falls below the lower threshold
from the upper threshold.
NOTE:
•
For network stability, use the default or set a higher traffic polling interval.
• Storm control uses a complete polling cycle to collect traffic data, and analyzes the data in the next cycle.
It takes a port at least one polling interval and at most two polling intervals to take a storm control action.
• The storm control function allows you to set the upper and lower thresholds for all three types of packets
respectively on the same interface.