I have a dual port ethernet NIC and let's say I have connected both ports in a loop and assigned the following IPs to the 2 ethernet interfaces:
- eth2 -> 192.168.2.1
- eth3 -> 192.168.3.1
I want to send traffic from 1 of the ports to the other over the physical network, e.g. ping
192.168.2.1. However, the TCP/IP stack in the Linux kernel recognizes that these two addresses are local and instead sends the traffic to the loopback adapter, so the traffic never hits the physical network.
The closest I have to a solution is Anastasov's send-to-self patch, which unfortunately, has been discontinued since kernel 3.6 so it won't work on Ubuntu 13.10 (kernel 3.11) for me. I've tried rewriting the patch for 3.11, but I can't seem to locate these in the Ubuntu distro:
Is there a way I can get the send-to-self patch to work, or an alternative solution?