Cisco Catalyst 2960 Command Reference Manual page 568
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storm-control
level pps pps
[pps-low]
action
{shutdown |
trap}
Defaults
Broadcast, multicast, and unicast storm control are disabled.
The default action is to filter traffic and to not send an SNMP trap.
Command Modes
Interface configuration
Command History
Release
12.2(25)FX
Usage Guidelines
Storm control is supported only on physical interfaces. You can also configure storm control on an
EtherChannel. When storm control is configured on an EtherChannel, the storm control settings
propagate to the EtherChannel physical interfaces.
The storm-control suppression level can be entered as a percentage of total bandwidth of the port, as a
rate in packets per second at which traffic is received, or as a rate in bits per second at which traffic is
received.
When specified as a percentage of total bandwidth, a suppression value of 100 percent means that no
limit is placed on the specified traffic type. A value of level 0 0 means that all broadcast, multicast, or
unicast traffic on that port is blocked. Storm control is enabled only when the rising suppression level is
less than 100 percent. If no other storm-control configuration is specified, the default action is to filter
the traffic causing the storm and to send no SNMP traps.
When the storm control threshold for multicast traffic is reached, all multicast traffic except control
Note
traffic, such as bridge protocol data unit (BDPU) and Cisco Discovery Protocol (CDP) frames, are
blocked.
The trap and shutdown options are independent of each other.
Catalyst 2960 Switch Command Reference
2-696
Specify the rising and falling suppression levels as a rate in packets per second at
which traffic is received on the port.
pps—Rising suppression level, up to 1 decimal place. The range is 0.0 to
•
10000000000.0. Block the flooding of storm packets when the value specified
for pps is reached.
pps-low—(Optional) Falling suppression level, up to 1 decimal place. The range
•
is 0.0 to 10000000000.0. This value must be equal to or less than the rising
suppression value.
You can use metric suffixes such as k, m, and g for large number thresholds.
Action taken when a storm occurs on a port. The default action is to filter traffic and
to not send an Simple Network Management Protocol (SNMP) trap.
The keywords have these meanings:
shutdown—Disables the port during a storm.
•
•
trap—Sends an SNMP trap when a storm occurs.
Modification
This command was introduced.
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
OL-8604-03
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