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Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 25 Configuring Port-Based Traffic Control
Displaying Port-Based Traffic Control Settings
Port Security and Switch Stacks
When a switch joins a stack, the new switch will get the configured secure addresses. All dynamic secure
addresses are downloaded by the new stack member from the other stack members.
When a switch (either the stack master or a stack member) leaves the stack, the remaining stack members
are notified, and the secure MAC addresses configured or learned by that switch are deleted from the
secure MAC address table. For more information about switch stacks, see Chapter 5, “Managing Switch
Stacks.”
Displaying Port-Based Traffic Control Settings
The show interfaces interface-id switchport privileged EXEC command displays (among other
characteristics) the interface traffic suppression and control configuration. The show storm-control and
show port-security privileged EXEC commands display those storm control and port security settings.
To display traffic control information, use one or more of the privileged EXEC commands in Table 25-4.
Table 25-4 Commands for Displaying Traffic Control Status and Configuration
Command Purpose
show interfaces [interface-id] switchport Displays the administrative and operational status of all switching
(nonrouting) ports or the specified port, including port blocking and
port protection settings.
show storm-control [interface-id] [broadcast |
multicast | unicast]
Displays storm control suppression levels set on all interfaces or the
specified interface for the specified traffic type or for broadcast traffic
if no traffic type is entered.
show port-security [interface interface-id] Displays port security settings for the switch or for the specified
interface, including the maximum allowed number of secure MAC
addresses for each interface, the number of secure MAC addresses on
the interface, the number of security violations that have occurred, and
the violation mode.
show port-security [interface interface-id] address Displays all secure MAC addresses configured on all switch interfaces
or on a specified interface with aging information for each address.
show port-security interface interface-id vlan Displays the number of secure MAC addresses configured per VLAN
on the specified interface.
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