[Click] Arp replies getting dropped

[Roman Chertov]

Yogesh,

I have used a similar config (transparent bridge) on Emulab plenty of 
time.  You just need to make the following change:
FromDevice(eth4) -> FromDevice(eth4, PROMISC true)
That should allow the device driver to accept packets even if the dst 
field does not match the device itself.

Roman

Yogesh Mundada wrote:
> hi,
> 
> I have following physical configuration at Emulab.
> 
> node2 (10.1.1.7) <-> (10.1.1.29, eth4) node0 (10.1.1.31, eth5) <->
> (10.1.1.3) node3
> 
> I am running this router config as linuxmodule:
> 
> q0 :: Queue;
> q1 :: Queue;
> FromDevice(eth4) -> Print("Received from Eth4") -> q0;
> FromDevice(eth5) -> Print("Received from Eth5") -> q1;
> q0 -> Print("Eth4-Eth5") -> ToDevice(eth5);
> q1 -> Print("Eth5-Eth4") -> ToDevice(eth4);
> 
> When I ping from node2, arp queries reach till node3 and node3 sends
> the arp replies. But these replies do not reach to node2. For
> debugging, I am printing message "Received from Eth5" via a Print
> element. However that message does not get printed.
> 
> 1. Is my configuration wrong or does some internal switch connecting
> node0 and node3 in Emulab, drops the packets?
> 2. I tried using tcpdump -i eth5. It did not work as click hijacks
> packets. If I use Tee and ToHost element, would I be able to capture
> packets using tcpdump? What is the preferred way?
> 
> -Yogesh
> _______________________________________________
> click mailing list
> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
>