Appendix B. Control Plane Policing
Control plane policing (abbreviated as CPP for Cisco IOS routers and as CoPP for Cisco IOS switches) is an application of quality of service (QoS) technologies in a security context that is available on switches and routers running Cisco IOS that allows the configuration of QoS policies that rate limit the traffic handled by the main CPU of the network device. This protects the control plane of the switch from direct denial-of-service (DoS) attacks, reconnaissance activity, and other unexpected flooding of the control plane.
CPP/CoPP protects IOS-based routers and switches by allowing the definition and enforcement of QoS policies that regulate the traffic processed by the main switch CPU (route or switch processor). ...
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