Ronja Twibright Labs

Emulating full duplex card using HDR

Emulating Full duplex card for IP protocol with Half Duplex Reduction



  • 2 network cards in one machine
  • Operating system where manual ARP and routing table manipulation can be done

Half duplex reduction

If you still don't have HDR, make one.


Set permanent ARP entry for the T network card, remote IP address and MAC address of the remote R card.


Set up the same IP address for both card in the pair.


Set up routing table so that the card with T label connector is used for transmission and the R one is nowhere mentioned in the routing table.

An expected information missing here?