Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 268
Control Plane Policing (CoPP), CoPP Implementation, Protocol-based Control Plane Policing
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10 Control Plane Policing (CoPP) Control plane policing (CoPP) protects the switch's routing, control, and line-card processors from undesired or malicious traffic and Denial of Service (DoS) attacks by filtering control-plane flows. CoPP uses a dedicated control-plane service policy that consists of ACLs and QoS policies, which provide filtering and rate-limiting capabilities for control-plane packets. CoPP is only applied to control-plane packets destined to CPUs on the switch, and not to transit protocol-control packets and data traffic that is passing through the switch. CoPP prevents undesired or malicious traffic from reaching the control-plane CPUs and rate limits legitimate control-plane traffic to acceptable limits. Topics: • CoPP Implementation • CoPP Example • Configure Control Plane Policing • Troubleshooting CoPP Operation CoPP Implementation The system's control plane consists of multi-core CPUs with internal queues for handling packets destined to the Route Processor, Control Processor, and line-card CPUs. On the system, CoPP is implemented as a distributed architecture. In this architecture, CoPP operates simultaneously in both distributed and aggregated modes. Distributed CoPP is achieved by applying protocol rate-limiting on each port pipe on a line card. Aggregated CoPP is achieved by applying protocol rate-limiting followed by queue rate-limiting on the centralized control plane switch. To configure a CoPP service policy, you create extended ACL rules and specify rate limits in QoS policies. QoS rate limits are applied to a protocol-based ACL filter or to a CPU queue. User-configured ACLs that filter protocol traffic flows to the control plane are automatically applied or disabled as the corresponding protocol is enabled or disabled in the system. In this way, control packets from disabled protocols never reach the control plane. Protocol-based Control Plane Policing To configure a protocol-based CoPP policy, you create an extended ACL rule for the protocol and specify the rate limit in a QoS policy. It is not necessary to specify the CPU queue because the protocol to queue mapping is handled internally by the system. To display the protocol-queue mapping for protocols that you can configure for protocol-based CoPP, enter the show {mac | ip | ipv6} protocol-queue-mapping command. Control Plane Policing (CoPP) 268
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1,186
-
1,187
-
1,188
-
1,189
-
1,190
-
1,191
-
1,192
-
1,193
-
1,194
-
1,195
-
1,196
-
1,197
-
1,198
-
1,199
-
1,200
-
1,201
-
1,202
-
1,203
-
1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246
-
1,247
-
1,248
-
1,249
-
1,250
-
1,251