vloop_vnf download and login details can be found @
https://lists.linuxfoundation.org/pipermail/opnfv-tech-discuss/2015-May/002601.html
The story involves integrating vloop_vnf with vsperf.

• We will need to allow for Gene’s L2FWD module to be selected as a forwarding app in the VM but we must also integrate testpmd with vloop vnf (leverage our exising methodology to copy and build DPDK in the guest). Testpmd will remain the default