11
•
When you configure the suppression threshold in kbps, the actual suppression threshold might
be different from the configured one as follows:
{
If the configured value is smaller than 64, the value of 64 takes effect.
{
If the configured value is greater than 64 but not an integer multiple of 64, the integer
multiple of 64 that is greater than and closest to the configured value takes effect.
For the suppression threshold that takes effect, see the prompt on the device.
Configuration procedure
To set storm suppression thresholds on an Ethernet interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Ethernet interface
view.
interface
interface-type
interface-number
N/A
3.
Enable broadcast
suppression and set the
broadcast suppression
threshold.
broadcast-suppression
{
ratio
|
pps max-pps
|
kbps max-kbps
}
By default, broadcast suppression
is disabled.
4.
Enable multicast
suppression and set the
multicast suppression
threshold.
multicast-suppression
{
ratio
|
pps max-pps
|
kbps max-kbps
}
By default, multicast suppression
is disabled.
5.
Enable unknown unicast
suppression and set the
unknown unicast
suppression threshold.
unicast-suppression
{
ratio
|
pps
max-pps
|
kbps max-kbps
}
By default, unknown unicast
suppression is disabled.
Configuring a Layer 2 Ethernet interface
Configuring storm control on an Ethernet interface
About storm control
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 an upper threshold.
Depending on your configuration, when a particular type of traffic exceeds its upper threshold, the
interface performs either of the following operations:
•
Blocks this type of traffic and forwards 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 interface begins to forward the traffic.
•
Goes
down
automatically
—The interface goes down automatically and stops forwarding any
traffic. When the blocked traffic drops below the lower threshold, the interface does not
automatically come up. To bring up the interface, use the
undo shutdown
command or disable
the storm control feature.
You can configure an Ethernet interface to output threshold event traps and log messages when
monitored traffic meets one of the following conditions:
•
Exceeds the upper threshold.
•
Drops below the lower threshold.