Thanks for the response Aaron, tcpreplay is looking like my best option so
far.
Can you provide more details on splitting traffic between interfaces to
maintain state - some tools like ixia can only follow a single session
(source and dest ip) for tcp only (they modify/correct any missing tcp
connection data too though). below you mentioned tcpreplay does 'garbage in,
garbage out' so can I assume it will maintain state for all packets and if
so:
-what is your definition of 'state' (timing?)
-am I limited to 2 nics?
-can I still replay files in sequence?
-I'd be using tcpprep and splitting on mac with caps 1GB+, which
distro/kernel would you suggest?
On Fri, Jan 29, 2010 at 12:34 PM, Aaron Turner <[email protected]> wrote:
> On Fri, Jan 29, 2010 at 6:30 AM, Geoff <[email protected]> wrote:
> > All,
> >
> > I am trying to find what the max support pcap file size is for tcpreplay,
> > can it do above 1GB?
>
> Yes, many people use tcpreplay to replay pcaps larger then 1GB.
> Generally speaking, the only limit to pcap file size is what your
> operating system supports.
>
> > also I'm having trouble accessing the site, getting a 'bad gateway' page,
> so
> > please forgive my easy questions.
>
> Sorry about that. Just moved the website to a new server and I'm
> still working out some issues with fcgi.
>
> > -in a capture file containing udp, tcp, ip flows will tcpreplay only
> > playback the stateful (tcp) packets?
>
> Tcpreplay sends the packets that are in the file. Garbage in, garbage
> out. If you need to filter out non-tcp packets, I suggest using
> tcpdump to filter out the packets you don't like. something like:
>
> tcpdump -s0 -r old.pcap -w new.pcap tcp
>
> would filter out any non-tcp packets.
>
> > -can you setup sequential replay, ie ten 1GB files to play one after
> > another?
>
> Yep. Something like:
>
> tcpreplay -i eth0 file1 file2 file3 file4 ...
>
>
> --
> Aaron Turner
> http://synfin.net/
> 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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