Hi, even after reading almost the whole webpage/docu I still have a couple of questions about tcpreplay.
I was able to compile it, got a tcpdump dump, used tcpprep, and was setting up my network (dual-card mode). Everything went very smoothly. I started tcpreplay --topspeed .... but forgot to plugin the network cable. With the result of 3379 Mbps on my two Gigabit cards. Same setup with network cable 1079 Mbps OS: Debian 6.0.3 kernel 2.6.32-5 CPU: Intel E2200 RAM:4GB network card: 2Ports out of a 4 Port Intel 82571EB PCIe (2.5GB/s) 4x On my MacOS BookPro8,3 I get 330MBps with cable and 992MBps without cable. My questions are: Do I understand that correctly that tcpreplay dumps the data (sorted by server/client) as fast as possible on to the cable without caring about the result. The change between single and dual-nic is only the distribution of the data send out? The "returning" data (in a dual-port setup) is not analyzed at all? The tcp sessions are not synced between the two network cards? Can it happen that a syn-ack is then from on card before the syn is send from the other card? But with all this, how can you be sure that the IPS is not only droping the package because of an overrun queue or any other problem? I'm trying to measure a transparent IPS just like: http://tcpreplay.synfin.net/wiki/usage #PassingTrafficThroughanIPSTransparentDevice I'm trying to use tcpreplay to do some hardware sizing to get a feeling what kind of hardware can handle what kind of load. We use iperf at the moment. I know that that is not a good option, but was the first thing that came to mind, was simple to setup and worked immediately. Greetings from Germany Jens ------------------------------------------------------------------------------ Cloud Services Checklist: Pricing and Packaging Optimization This white paper is intended to serve as a reference, checklist and point of discussion for anyone considering optimizing the pricing and packaging model of a cloud services business. Read Now! http://www.accelacomm.com/jaw/sfnl/114/51491232/ _______________________________________________ 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
