[ath9k-devel] Connecting multiple times to same base station

[Kilian Risse <krisse@student.ethz.ch>]

Thanks for the reply! I think I explained my problem poorly - I'll try
again;

I have an access point and 2 computers. One connected to the AP by
ethernet (PC0) and the other by wlan (PC1).

In order to simulate several clients in the wlan I multiplex the card of
PC1. The problem is that all frames sent from PC0 to the different
interfaces have the same MAC address.

I tried to change the MAC addresses in the ARP cache of PC0 such that
each IP has the intended MAC address (the one assigned to the
interface). But then the frames get all lost - I cannot even ping the
different interfaces of PC1 (except the primary interface as it still
has the same MAC).

> I'm guessing you're using the same IP subnet on all of them.
>
> You'll need to either tune IP routing
> (https://lwn.net/Articles/364318/) and/or force sockets to bind to
> interfaces (e.g. ping with "-I" parameter).
>
> Personally, I often use ipv6 link-local addresses to test traffic on
> such topologies to avoid the problem.

Correct me if I am wrong - but what you suggested is only needed if I
want to send data from the different interfaces to each other or send
from the different interfaces - right?

Thanks for the help

Kilian