Configuration Restrictions And Guidelines; Configuration Procedure - HP 3100 Series Configuration Manual

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 drops below the
lower threshold, the port begins to forward the traffic.
•
Shuts down automatically. The interface shuts down automatically and stops forwarding any
traffic. When the blocked traffic drops 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.
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

Configuration restrictions and guidelines

•
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.

Configuration procedure

To configure storm control on an Ethernet interface:
Step
Enter system view.
1.
Set the traffic polling interval
2.
of the storm control module.
Enter Ethernet interface
3.
view.
Enable storm control, and
4.
set the lower and upper
thresholds for broadcast,
multicast, or unknown
unicast traffic.
Set the control action to take
5.
when monitored traffic
exceeds the upper
threshold.
Enable the interface to send
6.
storm control threshold
event traps.
Command
system-view
storm-constrain interval
seconds
interface interface-type
interface-number
storm-constrain { broadcast |
multicast | unicast } pps
max-pps-values min-pps-values
storm-constrain control { block
| shutdown }
storm-constrain enable trap
13
"Configuring storm suppression."
Remarks
N/A
Optional.
10 seconds by default.
N/A
Disabled by default.
Optional.
Disabled by default.
Optional.
By default, the interface sends
traps when monitored traffic
exceeds the upper threshold or
drops below the lower threshold
from the upper threshold.