Proposed CLI:
set vpp ipfix collector <tag-ip> port 2055 set vpp ipfix collector <tag-ip> path-mtu 1450 set vpp ipfix collector <tag-ip> source-address 192.0.2.5 set vpp ipfix collector <tag-ip> template-interval xx set vpp ipfix collector <tag-ip> udp-checksum set vpp ipfix interface <x> [rx|tx|both] (both by default) set vpp ipfix interface <x> flow-variant <l2|ip4|ip6> (l2 by default) set vpp ipfix active-timeout x set vpp ipfix inactive-timeout y set vpp ipfix flowprobe-record <l2|l3|l4>