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Comment: updated default port info

Netflow Daemon Listening UDP Port

Currently Since version 3 of opFlow the default listening port is the more-or-less standard port 9995; for opFlow listening for Netflow data is UDP 12345.  This can be changed in the /usr/local/etc/flowd.conf file if requiredinstructing 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