Pointer to run NF in a forwarding mode

Hi,

Thank you for the work of refactoring NetBricks. I am wondering if anyone here can offer some pointers about running NF in a forwarding mode (like the testpmd DPDK example that can receive traffic from one phy port and send traffic from the other phy port). For now I can only get the traffic to go from pktgen to NetBricks, but not from NetBricks to the sink. Thx!