Version information (output of -V) tcpreplay version: 4.0.3 (build git:v4.0.3) Copyright 2013-2014 by Fred Klassen <tcpreplay at appneta dot com> - AppNeta Inc. Copyright 2000-2012 by Aaron Turner <aturner at synfin dot net> The entire Tcpreplay Suite is licensed under the GPLv3 Cache file supported: 04 Not compiled with libdnet. Compiled against libpcap: 1.5.3 64 bit packet counters: enabled Verbose printing via tcpdump: enabled Packet editing: disabled Fragroute engine: disabled Injection method: PF_PACKET send()
Platform (Red Hat Linux 9 on Intel, Solaris 7 on SPARC, etc) Debian 3.11.8-1 Make & model of the network card(s) and driver(s) version Card: Intel Corporation Ethernet 10G 2P X520 Adapter (rev 01) Driver: ixgbe 3.18.7 If possible, attach the pcap file used (compressed with bzip2 or gzip preferred) bigFlows.pcap from http://tcpreplay.appneta.com/wiki/captures.html Detailed description of your problem or what you are trying to accomplish I have a linux host with two interfaces 'traffic1' and 'traffic2'. Both of these interfaces are connected to each other through a switch. With this setup I am trying to test a pcap/cachefile pair for bidirectional replay. To create the cachefile I used the following command: /usr/local/bin/tcpprep --auto=client --pcap=bigFlows.pcap --cachefile=bigFlows.cache Then used the following command to replay the file one time: /usr/local/bin/tcpreplay --loop=1 --quiet --topspeed --cachefile=bigFlows.cache --intf1=traffic1 --intf2=traffic2 bigFlows.pcap And received the following report: Actual: 791615 packets (355417784 bytes) sent in 0.602658 seconds. Rated: 589750379.1 Bps, 4718.00 Mbps, 1313539.35 pps Flows: 40686 flows, 67510.92 fps, 791179 flow packets, 436 non-flow Statistics for network device: traffic1 Attempted packets: 584308 Successful packets: 584308 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 Flows total: 28397 Flows unique: 0 Flows expired: 0 Flow packets: 584308 Non-flow packets: 0 Invalid flow packets: 0 Statistics for network device: traffic2 Attempted packets: 207307 Successful packets: 207307 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 Flows total: 12289 Flows unique: 0 Flows expired: 0 Flow packets: 206871 Non-flow packets: 436 Invalid flow packets: 0 After that I ran the following command to replay the file two times: /usr/local/bin/tcpreplay --loop=2 --quiet --topspeed --cachefile=bigFlows.cache --intf1=traffic1 --intf2=traffic2 bigFlows.pcap And received the following report: Actual: 791615 packets (355417784 bytes) sent in 0.846339 seconds. Rated: 419947307.1 Bps, 3359.57 Mbps, 935340.33 pps Flows: 40686 flows, 48072.93 fps, 1582358 flow packets, 872 non-flow Statistics for network device: traffic1 Attempted packets: 584308 Successful packets: 584308 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 Flows total: 28397 Flows unique: 0 Flows expired: 0 Flow packets: 584308 Non-flow packets: 0 Invalid flow packets: 0 Statistics for network device: traffic2 Attempted packets: 207307 Successful packets: 207307 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 Flows total: 12289 Flows unique: 0 Flows expired: 0 Flow packets: 206871 Non-flow packets: 436 Invalid flow packets: 0 Now with the second run I was expecting to see twice as many packets transmitted as the first. To confirm the packet counts are really the same I reran the tcpreplay commands again with tcpdump running on both traffic interfaces. For both scenarios, tcpreplay and tcpdump reports that 791615 packets were seen. I have tried replaying the file again without the '--intf2' or '--cachefile' options and I am seeing the packet count values I was expecting. /usr/local/bin/tcpreplay --quiet --topspeed --intf1=traffic1 bigFlows.pcap Actual: 791615 packets (355417784 bytes) sent in 0.749699 seconds. Rated: 474080643.0 Bps, 3792.64 Mbps, 1055910.43 pps Flows: 40686 flows, 54269.78 fps, 791179 flow packets, 436 non-flow Statistics for network device: traffic1 Attempted packets: 791615 Successful packets: 791615 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 /usr/local/bin/tcpreplay --loop=2 --quiet --topspeed --intf1=traffic1 bigFlows.pcap Actual: 1583230 packets (710835568 bytes) sent in 1.04 seconds. Rated: 481899875.8 Bps, 3855.19 Mbps, 1073326.06 pps Flows: 40686 flows, 27582.43 fps, 3164716 flow packets, 1744 non-flow Statistics for network device: traffic1 Attempted packets: 1583230 Successful packets: 1583230 Failed packets: 0 Truncated packets: 0 Retried packets (ENOBUFS): 0 Retried packets (EAGAIN): 0 * Is the behaviour the result of something I've done wrong? * Anyone got ideas for more tests I can run to narrow down the issue? ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. Written by three acclaimed leaders in the field, this first edition is now available. Download your free book today! http://p.sf.net/sfu/13534_NeoTech _______________________________________________ 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
