18-4
Catalyst 3750 Metro Switch Software Configuration Guide
78-15870-01
Chapter 18 Configuring Port-Based Traffic Control
Configuring Protected Ports
To disable storm control, use the no storm-control broadcast level, no storm-control multicast level,
or no storm-control unicast level interface configuration commands.
This example shows how to set the multicast storm control level at 70.5 percent on an interface and verify
the configuration:
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# storm-control multicast level 70.5
Switch(config-if)# end
Switch# show storm-control gigabitethernet1/0/17 multicast
Interface Filter State Level Current
--------- ------------- ------- -------
Gi1/0/1 Forwarding 70.50% 0.00%
This example shows how to disable the multicast storm control on an interface and verify the
configuration:
Switch# configure terminal
Switch(config)# interface gigabitethernet1/0/1
Switch(config-if)# no storm-control multicast level
Switch(config-if)# end
Switch# show storm-control gigabitethernet1/0/1 multicast
Interface Filter State Level Current
--------- ------------- ------- -------
Gi1/0/1 inactive 100.00% N/A
Configuring Protected Ports
Some applications require that no traffic be forwarded at Layer 2 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 broadcast) to any other port that
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.
Default Protected Port Configuration
The default is to have no protected ports defined.
Step 7
show storm-control [interface-id] [broadcast |
multicast | unicast]
Verify the storm control suppression levels set on the interface for
the specified traffic type. If you do not enter a traffic type,
broadcast storm control settings are displayed.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
Command Purpose
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