Netflow Collection Engine May 2026

| Strategy | Description | Reduction Factor | |----------|-------------|------------------| | (exporter side) | Exporter only reports 1 of every N packets. | 10x–1000x | | Aggregation (collector side) | Merge flows with same key fields over fixed intervals (1,5,10 min). | 10x–100x | | Field pruning | Drop unused fields (e.g., TCP flags, ToS). | 2x–5x | | Delta compression | Store changes between consecutive records for the same flow key. | 3x–10x |

Random flow records have zero bytes/packets. Cause: Exporter sends flow expiry due to idle timeout before any data transfer (e.g., SYN-only flows). Filter them out. netflow collection engine

IPFIX templates not recognized, records garbled. Cause: UDP loss of template datagram. Increase collector buffer or switch to TCP transport. | Strategy | Description | Reduction Factor |