From the course: Cisco Network Security: Secure Routing and Switching

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Secure the control plane

Secure the control plane

From the course: Cisco Network Security: Secure Routing and Switching

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Secure the control plane

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- [Instructor] The control plane is where the device learns what action to take on the data. No data moves until the control plane decides on the best path to deliver the data. To understand the need to secure the control plane, we need to visualize the path data takes as it traverses through the router. We have data going into the router via an ingress interface. The inbound traffic has data plane or user generated packets, but the traffic also consists of control and management plane traffic. Management plane traffic is traffic used when we're configuring the device. Control plane traffic is used to control the flow of the network. Services is a subset of the data plane, and in the data plane this is the user generated data. As traffic passes through the interface, the interface access control list will filter the traffic. In the center we see Cisco Express Forwarding, or the CEF table, which is an optimized layer three…

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