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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 28 Configuring Port-Based Traffic Control
Configuring Storm Control
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.
Command Purpose