Thanks for the swift response Aaron, tcpreplay gets better support than
some so-called 'Enterprise' apps I deal with.
Don't know how I missed that in the docs :/
Running at test between two boxes now, and still not seeing the data show
up at the client side. I see the data in tcpdump, again it seems identical
to what was sent compared side-by-side.
I am checking with the network team if anything is showing up on the
switches.
On Sep 27, 2012 11:10 PM, "Aaron Turner" <synfina...@gmail.com> wrote:
> Sounds like you're trying to run tcpreplay on the same box as the
> target. This doesn't work, because tcpreplay bypasses the host's
> routing table and sends traffic *out* the interface. Packets are
> never "seen" by the IP stack and so never get delivered to your
> daemon.
>
> On Thu, Sep 27, 2012 at 10:35 AM, cwl <cwl...@gmail.com> wrote:
> > Hi Guys,
> >
> > Having some trouble getting a simple multicast transmission replayed.
> >
> > Here is the scenario(eth0 == 10.0.2.15), all on the same host:
> >
> > 1. I start tcpdump with:
> > tcpdump -i eth0 -s0 udp dst port 1111 -w mdump2.pcap
> >
> > 2. I start my multicast subscribing app:
> > ./mdump 224.192.16.1 1111 10.0.2.15
> >
> > 3. I start the sender:
> > ./msend 224.192.16.1 1111 10 10.0.2.15
> >
> > This works fine.
> >
> > Then I try to replay the setup with tcpreplay:
> >
> > 1. tcpdump -i eth0 -s0 udp dst port 1111 -w tcpreplay.pcap
> > 2. ./mdump 224.192.16.1 1111 10.0.2.15
> > 3. tcpreplay -i eth0 /tmp/mdump2.pcap
> >
> >
> > The network setup is identical(tcpreplay just taking the place of
> msend), I
> > played around with tcpprep & tcprewrite I couldn't see anything I would
> need
> > to do. The correct source/dest MAC addresses show up in the capture.
> >
> > I don't see any errors/drops in /var/log/messages, or netstat -u.
> Although
> > the packets from tcpreplay are showing up in tcpdump, they do not
> increase
> > the packet count of netstat -s.
> >
> > I have compared the msend capture vs the tcpreplay capture, and they are
> > virtually identical, I am really stumped. I am sure it something simple.
> >
> > Details
> > ----------
> >
> > root@andy-VirtualBox:/tmp/mtools# tcpreplay -V
> > tcpreplay version: 3.4.3 (build 2375)
> > Copyright 2001-2009 by Aaron Turner <aturner at synfin dot net>
> > Cache file supported: 04
> > Not compiled with libdnet.
> > Compiled against libpcap: 1.1.1
> > 64 bit packet counters: enabled
> > Verbose printing via tcpdump: enabled
> > Packet editing: disabled
> > Fragroute engine: disabled
> > Injection method: PF_PACKET send()
> >
> > This was captured on virtualbox/ubuntu 12, but I have also tried on
> CentOS 6
> > & RHEL 6 with real hardware and identical results.
> >
> > I have attached my captures, if there is anything else I can provide
> please
> > let me know.
> >
> > Any idea's/suggestions would be very we received!
> >
> > Thanks,
> >
> > Andrew
> >
> >
> >
> >
> >
> >
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> > _______________________________________________
> > Tcpreplay-users mailing list
> > Tcpreplay-users@lists.sourceforge.net
> > https://lists.sourceforge.net/lists/listinfo/tcpreplay-users
> > Support Information: http://tcpreplay.synfin.net/trac/wiki/Support
>
>
>
> --
> 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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> Make your web apps faster with AppDynamics
> Download AppDynamics Lite for free today:
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> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
> _______________________________________________
> Tcpreplay-users mailing list
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> https://lists.sourceforge.net/lists/listinfo/tcpreplay-users
> Support Information: http://tcpreplay.synfin.net/trac/wiki/Support
>
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