J-Flow is a proprietary accounting technology used by Juniper Networks that allows you to collect IP traffic flow statistics.
J-Flow enables you to export data to a UDP port on a J-Flow collector. You can also enable J-Flow on a router or network interface to collect network statistics for specific locations on your network.
J-Flow uses a connection-less protocol (UDP). When data is sent from a switch or router, the J-Flow record is purged. UDP doesn't guarantee delivery of the data. As such, inaccurate presentations of both traffic volumes and bidirectional flows, and reduced alerting capabilities, might result when using a J-Flow flow source. J-Flow traffic is based on sampled data and, therefore, might not represent all network traffic.
For more information about J-Flow, see the Juniper Networks website (www.juniper.net).
J-Flow flow source configuration
- Ensure that the appropriate firewall rules are configured.
- Ensure that the appropriate ports are configured for your IBM® QRadar® Flow Collector.
Supported VLAN fields