On Fri, Jun 17, 2011 at 9:57 AM, Dileep Simha <dsi...@gmail.com> wrote:
> I have a question about the randomizing ip address function of
> tcpreplay-edit.
> When I run the following: ./tcpreplay-edit --intf1=lo --topspeed --seed=10
> --loop=3 capture.pcap,
> is the ip address randomized before every single loop or is it just done
> once and then the same ip address sent over and over.  I was going to check
> this with --verbose flag but that keeps giving me an error

Sorry about the verbose flag issue... been driving me nuts that one.

As for seed & loop, basically you'll end up with the same IP addresses
3 times.  Basically randomization is done by combining the seed +
original IP to generate the new IP.   In order for sessions not to
break, the code makes sure that a given seed + IP always results in
the same "randomized IP".

FWIW, replaying over loopback is almost always the wrong thing to do.


-- 
Aaron Turner
http://synfin.net/         Twitter: @synfinatic
http://tcpreplay.synfin.net/ - Pcap editing and replay tools for Unix & Windows
Those who would give up essential Liberty, to purchase a little temporary
Safety, deserve neither Liberty nor Safety.
    -- Benjamin Franklin
"carpe diem quam minimum credula postero"

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