Cisco Cisco IOS Software Release 12.2(27)SBC

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The Control Plane Policing feature allows users to configure a quality of service (QoS) filter that 
manages the traffic flow of control plane packets to protect the control plane of Cisco IOS routers and 
switches against reconnaissance and denial-of-service (DoS) attacks. In this way, the control plane (CP) 
can help maintain packet forwarding and protocol states despite an attack or heavy traffic load on the 
router or switch.

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 

“Feature Information for Control Plane Policing” section on page 34

. 

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image 
support. Access Cisco Feature Navigator at 

. You must have an account on 

Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at 
the login dialog box and follow the instructions that appear.