Executive Summary Modern networks require both depth and speed in visibility. Traditional IPFIX (NetFlow v10) delivers rich flow context but with inherent latency. Sampled Port Mirroring (SPM) provides near real-time packet samples with payload visibility. IPFIX IE 315 bridges the two by exporting sampled packet data inside standard IPFIX records. These technologies are not competitors — they are powerful complements, especially in high-speed DDoS protection scenarios. What is IPFIX? IPFIX (IP Flow Information Export) is the standardized evolution of NetFlow. It collects metadata about network flows — conversations defined by the 5-tuple (source/destination IP, ports, protocol). ...