Netflow9_custom_sampling_rate_received 8688 As option, if you need multiple samplers, please set them to same sampling rate.Īlso, you may check system counters to confirm that FastNetMon received and decoded sampling announcements from routers: sudo fcli show system_counters |grep netflow9 |grep sampling FastNetMon can detect sampling rate when your have only single sampler. That’s technical restriction, please avoid this configuration. It may detect sampling rate incorrectly when you have multiple samplers configured on routers. You can check detected sampling rate per router this way: sudo fcli show netflow_sampling_rates Also, please replace “10.0.0.1” in this configuration by address of machine where you have FastNetMon.Īlso, please set this option for all interfaces: flow ipv4 monitor exporter-map sampler FIRST-SAMPLER ingressįastNetMon can detect sampling rate from routers automatically in almost all cases. ![]() If you prefer IPFIX you can replace “v9” by “ipfix” in this configuration. ![]() We can suggest following configuration from ASR 9000 series of Cisco routers: flow exporter-map FASTNETMON-EXPORTER But considering amount of available port capacity on these routers, we suggest using sampling by default to avoid control plane CPU overload. Cisco ASR 9000 series routers have solid support for Netflow and can generate Netflow for quite big amount of traffic without any issues.
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