1-10
and takes corresponding actions (that is, blocking or shutting down the port and sending trap messages
and logs) when the traffic detected exceeds the threshold.
Alternatively, you can configure the storm suppression function to control a specific type of traffic. As
the function and the storm constrain function are mutually exclusive, do not enable them at the same
time on an Ethernet port. For example, with broadcast storm suppression ratio set on an Ethernet port,
do not enable the storm constrain function for broadcast traffic on the port. Refer to
Configuring Storm
Suppression
for information about the storm suppression function.
With the storm constrain function enabled on an Ethernet port, you can specify the system to act as
follows when the traffic detected exceeds the threshold.
z
Blocking the port. In this case, the port is blocked and thus stops forwarding the traffic of this type
till the traffic detected is lower than the threshold. Note that a port blocked by the storm constrain
function can still forward other types of traffic and monitor the blocked traffic.
z
Shutting down the port. In this case, the port is shut down and stops forwarding all types of traffic.
Ports shut down by the storm constrain function can only be brought up by using the
undo
shutdown
command or disabling the storm constrain function.
Follow these steps to configure the storm constrain function on an Ethernet port:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Set the interval for generating
traffic statistics
storm-constrain interval
seconds
Optional
10 seconds by default
Enter Ethernet port view
interface interface-type
interface-number
—
Enable the storm constrain
function and set the lower
threshold and the upper
threshold
storm-constrain
{
broadcast
|
multicast
}
{
pps
|
kbps
|
ratio
}
max-pps-values
min-pps-values
Required
Disabled by default
Set the action to be taken when
the traffic exceeds the upper
threshold
storm-constrain control
{
block
|
shutdown
}
Optional
Disabled by default
Specify to send trap messages
when the traffic detected
exceeds the upper threshold or
drops down below the lower
threshold from a point higher
than the upper threshold
storm-constrain enable trap
Optional
By default, the system sends
trap messages when the traffic
detected exceeds the upper
threshold or drops down below
the lower threshold from a point
higher than the upper
threshold.
