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. For Release 12.2(18)S, this feature was introduced. For Release 12.3(4)T, this feature was integrated into Cisco IOS Release 12.3(4)T, and the output rate-limiting (silent mode operation) feature was added. For Release 12.3(7)T, the CISCO-CLASS-BASED-QOS-MIB was extended to manage control plane QoS policies, and the police ratecommand was introduced to support traffic policing on the basis of packets per second for control plane traffic. For Release 12.0(29)S, this feature was integrated into Cisco IOS Release 12.0(29)S. For Release 12.2(18)SXD1, this feature was integrated into Cisco IOS Release 12.2(18)SXD1. For Release 12.0(30)S, this feature was modified to include support for distributed control plane services on the Cisco 12000 series Internet router. For Release 12.2(27)SBC, this feature was integrated into Cisco IOS Release 12.2(27)SBC. For Release 12.0(32)S, this feature was modified to include support for aggregate control plane services on the Cisco 10720 Internet router. For Release 12.3(31)SB2, this feature was implemented on the Cisco 10000 series router for the PRE3. For Release 15.0(1)S, this feature was integrated into Cisco IOS Release 15.0(1)S. |