I have a machine (tester) that wants to test many network devices
simultaneously. These devices are all hard coded to one subnet/ip. I
have many network adaptors on this one testing machine, and I want
them to each have the same ip address (that will be visible to the
devices that I am testing).
My Network/Internet
|
1.2.3.4
+---------eth0-------------------------+
| 1.2.3.4 |
| |
| tester |
| |
| 10.1.1.1 10.1.2.1 10.1.N.1 |
+----eth1---------eth2---------ethN----+
10.0.0.1 10.0.0.1 10.0.0.1
| | |
10.0.0.2 10.0.0.2 10.0.0.2
device1 device2 deviceN
Is this sort of a setup possible? I know that I could do it if I had
one linux machine per device being tested.
I was hoping to solve this using NETMAP and something like
iptables -t nat -A POSTROUTING -o eth1 -d 10.1.1.0/24 -j NETMAP --to 10.0.0.0/24
but that does not work (I think that NETMAP in a POSTROUTING rule will
only change source addresses, and if I put the NETMAP on PREROUTING or
OUTPUT, then the address gets translated to 10.0.0.2 too early, and I
assume that linux will not know what network card to send it out on.
Any help would be greatly appreciated.
Cliff
