Network Traffic Generation

[marc at swiftouch.com]

I concur.

You could try playing with routing by assigning certain routes to phys  
ifaces. But you are way better off with multiple boxes.

---MAV
Marc. Volovic
+972-54-467-6764
marc at swiftouch.com
Sent from my iPhone

On Mar 13, 2009, at 6:46 PM, Aviv Greenberg <avivgnet at gmail.com> wrote:

> Seems like you have a routing problem.
>
> Say you have 1 box with 2 interfaces, having IP x and y.
> When you try to ping or connect to either x or y, the routing table is
> being consulted.
> The answer of "what is the route to x" is "Local" - and it is treated
> as loopback.
> I don't think actual packets will go on the wire.
>
> you can try crafting mind bogling routing rules to fix it, or better
> use 2 boxes.
>
> 2009/3/13 Daniel Feiglin <dilogsys at inter.net.il>:
>> Hello folks!
>>
>> I'm trying to use a Linux box as a packet traffic generator. It has  
>> two
>> NICs configured with fixed IP addresses, 192.168.2.100/101. For  
>> testing
>> purposes, I connected the two NICs to each other with a crossed  
>> network
>> cable (hardware loopback). For what it's worth, they can both be  
>> pinged
>> from the host and the ifconfig output looks fine.
>>
>> Later, the crossed cable will be replaced by a radio link (which  
>> relates
>> to the purpose of all this).
>>
>> To carry out the packet generation, I downloaded and built the iperf
>> program (http://sourceforge.net/forum/forum.php?forum_id=808751).
>>
>> I'd like to sent stuff from .100 to .101 using the client and server
>> instances of iperf in two console sessions and (later) monitor what's
>> happening with tcpdump from a third session.
>>
>> For various reasons, it's not working. (I have successfully done it
>> using two machines on either side of the radio link, which is  the
>> "standard" method.)
>>
>> Has anyone on the list done this (using iperf or something similar)
>> using a single box with two NICs?
>>
>> Regards,
>>
>>
>> Daniel
>>
>> P.S. I'll supply further background material if there is interest in
>> this subject.
>>
>>
>>
>>
>>
>>
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>>
>>
>
>
>
> -- 
>
> Joan Collins  - "The problem with beauty is that it's like being born
> rich and getting poorer."
>
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