23-4
Catalyst 2975 Switch Software Configuration Guide
OL-19720-02
Chapter 23 Configuring Port-Based Traffic Control
Configuring Storm Control
Beginning in privileged EXEC mode, follow these steps to storm control and threshold levels:
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
interface
interface-id
Specify the interface to be configured, and enter interface configuration
mode.
Step 3
storm-control
{
broadcast
|
multicast
|
unicast
}
level
{
level
[
level-low
] |
bps
bps
[
bps-low
] |
pps
pps
[
pps-low
]}
Configure broadcast, multicast, or unicast storm control. By default, storm
control is disabled.
The keywords have these meanings:
•
For
level
, specify the rising threshold level for broadcast, multicast, or
unicast traffic as a percentage (up to two decimal places) of the
bandwidth. The port blocks traffic when the rising threshold is reached.
The range is 0.00 to 100.00.
•
(Optional) For
level-low
, specify the falling threshold level as a
percentage (up to two decimal places) of the bandwidth. This value
must be less than or equal to the rising suppression value. The port
forwards traffic when traffic drops below this level. If you do not
configure a falling suppression level, it is set to the rising suppression
level. The range is 0.00 to 100.00.
If you set the threshold to the maximum value (100 percent), no limit is
placed on the traffic. If you set the threshold to 0.0, all broadcast,
multicast, and unicast traffic on that port is blocked.
•
For
bps
bps
, specify the rising threshold level for broadcast, multicast,
or unicast traffic in bits per second (up to one decimal place). The port
blocks traffic when the rising threshold is reached. The range is 0.0 to
10000000000.0.
•
(Optional) For
bps-low
, specify the falling threshold level in bits per
second (up to one decimal place). It can be less than or equal to the
rising threshold level. The port forwards traffic when traffic drops
below this level. The range is 0.0 to 10000000000.0.
•
For
pps
pps
, specify the rising threshold level for broadcast, multicast,
or unicast traffic in packets per second (up to one decimal place). The
port blocks traffic when the rising threshold is reached. The range is 0.0
to 10000000000.0.
•
(Optional) For
pps-low
, specify the falling threshold level in packets
per second (up to one decimal place). It can be less than or equal to the
rising threshold level. The port forwards traffic when traffic drops
below this level. The range is
0.0 to
10000000000.0
.
For BPS and PPS settings, you can use metric suffixes such as k, m, and g
for large number thresholds.
Step 4
storm-control action
{
shutdown
|
trap
}
Specify the action to be taken when a storm is detected. The default is to
filter out the traffic and not to send traps.
•
Select the
shutdown
keyword to error-disable the port during a storm.
•
Select the
trap
keyword to generate an SNMP trap when a storm is
detected.
Step 5
end
Return to privileged EXEC mode.
