NetFlow is a baseline form of telemetry that is recommended for network infrastructure devices. NetFlow is a technology that collects and exports information about IP traffic flows on enabled interfaces. NetFlow can provide valuable insight into the network performance, utilization, behavior, and security. NetFlow can help identify anomalies, such as DDoS attacks, malware, or misconfigurations, by comparing the current traffic patterns with the normal or baseline ones. NetFlow can also help with capacity planning, troubleshooting, and forensic analysis. NetFlow is supported on various Cisco platforms, such as routers, switches, firewalls, and IPS sensors. NetFlow can export data to different collectors and analyzers, such as Cisco Security Monitoring, Analysis and Response System (CS-MARS), Cisco Traffic Anomaly Detectors and Cisco Guard DDoS Mitigation Appliances, Cisco Network Analysis Module (NAM), and other third-party tools. References:
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