Cisco Cisco IOS Software Release 12.4(15)T

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This feature allows you to configure protected port security on all modular platforms with installed 4- 
or 9-port high-speed WAN interface card (HWIC) modules. Some applications require that no traffic be 
forwarded between ports on the same device 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 device. 

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.