Feature Request: IPFIX field ingressInterface should carry meaningful interface index

[riccardo-negri]

Dear CESNET Team,

Would it be possible to use the IANA field flowDirection (61) instead of the ingressInterface (10) field to carry the configuration option output_plugin.ipfix.exporter.dir?

ipfixprobe/init/link0.conf.example

Line 73 in 480f208

dir: 0 # Direction bit field value (0 = incoming, 1 = outgoing)

ipfixprobe/include/ipfixprobe/ipfix-elements.hpp

Line 88 in 480f208

#define INPUT_INTERFACE(F) F(0, 10, 4, &this->dir_bit_field)

A previous issue (#305) already mentions this.

This change would allow the ingressInterface (10) field to be used as intended: carrying a meaningful value provided through a configuration option such as output_plugin.ipfix.exporter.monitored_interface.

Could you please let me know if adding this change to your roadmap would be feasible?
For my team, having a meaningful ingress interface present in IPFIX is a prerequisite for adopting ipfixprobe.

Thank you for your time and consideration.

Best Regards,
Riccardo