Runs the components meant for Cisco NX-OS device management purposes such as the command-line interface (CLI) and Simple Network Management Protocol (SNMP). These packets are destined to router addresses and are called control plane packets. These protocols, such as the Border Gateway Protocol (BGP) and the Open Shortest Path First (OSPF) Protocol, send control packets between devices. Handles all routing protocol control traffic. These packets are handled by the data plane. The packets that are not meant for the switch itself are called the transit packets. The basic functionality of a Cisco NX-OS device is to forward packets from one interface to another. The supervisor module divides the traffic that it manages into three functional components or planes: Such attacks, which can be perpetrated either inadvertently or maliciously, typically involve high rates of traffic destined to the route processor itself. The Cisco NX-OS device provides CoPP to prevent DoS attacks from impacting performance. A common attack vector for network devices is the denial-of-service (DoS) attack, where excessive traffic is directed at the device interfaces. ![]() This policy map looks like a normal QoS policy and is applied to all traffic destined to any of the IP addresses of the router or Layer 3 switch. This feature allows a policy map to be applied to the control plane. ![]() Control Plane Policing (CoPP) protects the control plane and separates it from the data plane, thereby ensuring network stability, reachability, and packet delivery.
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