Default Port Security Configuration - Cisco Catalyst 2975 Software Configuration Manual

Chapter 23 Configuring Port-Based Traffic Control
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Table 23-1
security.
Table 23-1 Security Violation Mode Actions
Traffic is
Violation Mode forwarded
protect No
restrict No
shutdown No
shutdown vlan No
1. Packets with unknown source addresses are dropped until you remove a sufficient number of secure MAC addresses.
2. The switch returns an error message if you manually configure an address that would cause a security violation.
3. Shuts down only the VLAN on which the violation occurred.

Default Port Security Configuration

Table 23-2
Table 23-2
Feature
Port security
Sticky address learning
Maximum number of secure
MAC addresses per port
Violation mode
Port security aging
OL-19720-02
restrict—When the number of secure MAC addresses reaches the maximum limit allowed on the
port, packets with unknown source addresses are dropped until you remove a sufficient number of
secure MAC addresses to drop below the maximum value or increase the number of maximum
allowable addresses. In this mode, you are notified that a security violation has occurred. An SNMP
trap is sent, a syslog message is logged, and the violation counter increments.
shutdown—A port security violation causes the interface to become error-disabled and to shut down
immediately, and the port LED turns off. When a secure port is in the error-disabled state, you can
bring it out of this state by entering the errdisable recovery cause psecure-violation global
configuration command, or you can manually re-enable it by entering the shutdown and no shut
down interface configuration commands. This is the default mode.
shutdown vlan—Use to set the security violation mode per-VLAN. In this mode, the VLAN is error
disabled instead of the entire port when a violation occurs
shows the violation mode and the actions taken when you configure an interface for port
Sends SNMP
1
trap
No
Yes
No
No
shows the default port security configuration for an interface.
Default Port Security Configuration
Sends syslog Displays error
message message
No No
Yes No
No No
Yes No
Default Setting
Disabled on a port.
Disabled.
1
Shutdown. The port shuts down when the maximum number of
secure MAC addresses is exceeded.
Disabled. Aging time is 0.
Static aging is disabled.
Type is absolute.
Catalyst 2975 Switch Software Configuration Guide
Configuring Port Security
Violation
counter
2
increments
No
Yes
Yes
Yes
Shuts down port
No
No
Yes
3
No
23-11