Netflow Daemon Listening UDP Port
Since version 3 of opFlow the default listening port is the more-or-less standard port 9995; for instructing nfdump/nfcapd to use a different port see the opFlow 3 Installation Guide.
(In legacy version 2.x, a different flow collector was used, and the default port was 12345; instructions for changing that can be found in the opFlow 2.x Installation Guide.
Sample Cisco Netflow Configuration
The following is a basic Cisco Router configuration for telling the router to send Netflow data to the opFlow.
Sample Juniper J-Flow Configuration for SRX
J-FLow version 5 example (IPV4 only)
To keep things simple if you are only looking at IPV4 traffic then use Version 5 J-Flow example below. As shown
J-FLow version 9
J-FLow version 9 supports other protocols such as IPV6 and MPLS . To get good results we recommend you still only use a template for IPV4 with Version 9. There are some subtle differences with the SRX models for the config so please refer to J-Flow SRX version 9 Config Examples