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Catalyst 6500 Series Switch Cisco IOS Software Configuration Guide—Release 12.1 E
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Chapter 28 Configuring Traffic Storm Control
Default Traffic Storm Control Configuration
Traffic storm control monitors the level of each traffic type for which you enable traffic storm control in
1-second traffic storm control intervals. Within an interval, when the ingress traffic for which traffic
storm control is enabled reaches the traffic storm control level that is configured on the port, traffic storm
control drops the traffic until the traffic storm control interval ends.
The following are examples of traffic storm control behavior:
• If you enable broadcast traffic storm control, and broadcast traffic exceeds the level within a
1-second traffic storm control interval, traffic storm control drops all broadcast traffic until the end
of the traffic storm control interval.
• If you enable broadcast and multicast traffic storm control, and the combined broadcast and
multicast traffic exceeds the level within a 1-second traffic storm control interval, traffic storm
control drops all broadcast and multicast traffic until the end of the traffic storm control interval.
• If you enable broadcast and multicast traffic storm control, and broadcast traffic exceeds the level
within a 1-second traffic storm control interval, traffic storm control drops all broadcast and
multicast traffic until the end of the traffic storm control interval.
• If you enable broadcast and multicast traffic storm control, and multicast traffic exceeds the level
within a 1-second traffic storm control interval, traffic storm control drops all broadcast and
multicast traffic until the end of the traffic storm control interval.
Default Traffic Storm Control Configuration
Traffic storm control is disabled by default.
Enabling Traffic Storm Control
To enable traffic storm control, perform this task:
Command Purpose
Step 1 Router(config)# interface {{type1 slot/port} |
{port-channel number}}
Selects an interface to configure.
Step 2 Router(config-if)# storm-control broadcast level
level[.level]
Enables broadcast traffic storm control on the interface,
configures the traffic storm control level, and applies the
traffic storm control level to all traffic storm control
modes enabled on the interface.
Router(config-if)# no storm-control broadcast
level
Disables broadcast traffic storm control on the interface.
Step 3 Router(config-if)# storm-control multicast level
level[.level]
Note The storm-control multicast command is
supported only on Gigabit Ethernet interfaces.
Enables multicast traffic storm control on the interface,
configures the traffic storm control level, and applies the
traffic storm control level to all traffic storm control
modes enabled on the interface.
Router(config-if)# no storm-control multicast
level
Disables multicast traffic storm control on the interface.