upper        lower
  +--=----[ em4: ]----------+
  |                         |
  |    r2l        l2r       |
  +-=-----[ tee  ]----------+
  |                         |
  | iface1           iface2 |
  +-------[ netflow ]-------+

# connect ng_tee
mkpeer em4: tee lower left2right
name em4:lower nf_tee
connect em4: nf_tee: upper right2left

# connect ng_netflow
mkpeer nf_tee: netflow left2right iface2
name nf_tee:left2right netflow
connect nf_tee: netflow: right2left iface1

# connect export hook
mkpeer netflow: ksocket export inet/dgram/udp
msg netflow:export connect inet/77.91.129.2:4994