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Catalyst2950 Desktop Switch Software Configuration Guide
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Chapter17 Configuring Port-Based Tra ffic Control Configuring Protected Ports

Disabling Storm Control

Beginning in privileged EXEC mode, follow these steps to disable storm control:
Configuring Protected Ports
Some applications require that no traffic be forwarded between ports on the same switch so that one
neighbor does not see the traffic generated by another neighbor. In such an environment, the use of
protected ports ensures that there is no exchange of unicast, broadcast, or multicast traffic between these
ports on the switch.
Protected ports have these features:
•A protected port does not forward any traffic (unicast, multicast, or br oadcast) to an y oth er port t hat
is also a protected port. Traffic cannot be forwarded between protected ports at Layer 2; all traffic
passing between protected ports must be forwarded through a Layer 3 device.
•Forwarding behavior between a protected port and a nonprotected port proceeds as usual.
The default is to have no protected ports defined.
A protected port cannot be a secure port.
You can configure protected ports on a physical interface (for example, Gigabit Ethernet 0/1) or an
EtherChannel group (for example, port-channel 5). When you enable protec ted ports for a port channel,
it is enabled for all ports in the port-channel group.
Beginning in privileged EXEC mode, follow these steps to define a port as a protected port:
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the port to configure, and enter interface configuration mode.
Step3 no storm-control {broadcast |
multicast | unicast} level Disable port storm control.
Step4 no storm-control action {shutdown |
trap}Disable the specified storm control action.
Step5 end Return to privileged EXEC mode.
Step6 show storm-control {broadcast |
multicast | unicast}Verify your entries.
Step7 copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
Step1 configure terminal Enter global configuration mode.
Step2 interface interface-id Specify the type and number of the physical interface to
configure, for example gigabitethernet0/1, and enter
interface configuration mode.
Step3 switchport protected Configure the interface to be a protected port.
Step4 end Return to privileged EXEC mode.