我使用-R和-K选项,但它似乎没有工作,因为我使用tcpdump捕获泵送流量,我看到的数据包数似乎与我期望的数据包数量相匹配帧。
答案 0 :(得分:2)
首先请确保您使用的是最新版本here。您将需要使用-K和--mbps(或-M)选项,例如:
# tcpreplay -i eth7 -K --mbps 1000 smallFlows.pcap
File Cache is enabled
Actual: 14261 packets (9216531 bytes) sent in 0.073761 seconds.
Rated: 124951275.0 Bps, 999.61 Mbps, 193340.65 pps
Flows: 1209 flows, 16390.77 fps, 14243 flow packets, 18 non-flow
Statistics for network device: eth7
Attempted packets: 14261
Successful packets: 14261
Failed packets: 0
Truncated packets: 0
Retried packets (ENOBUFS): 0
Retried packets (EAGAIN): 0
当您尝试移动到更高的速度(例如10GigE)时,您可能需要使用--loop选项生成更大的数据块。此外,对于Tcpreplay版本4.0,还有更高级的--netmap和--unique-ip选项,它们在正确设置的系统上将实现接近线速和非常高的流/秒。有关更多信息,请访问Tcpreplay How To。这是一个例子:
# tcpreplay -i eth7 -K --mbps 9500 --loop 100 --netmap --unique-ip smallFlows.pcap
Switching network driver for eth7 to netmap bypass mode... done!
File Cache is enabled
Actual: 1426100 packets (921653100 bytes) sent in 0.776133 seconds.
Rated: 1187493767.1 Bps, 9499.95 Mbps, 1837442.80 pps
Flows: 120900 flows, 155772.27 fps, 1424300 flow packets, 1800 non-flow
Statistics for network device: eth7
Attempted packets: 1426100
Successful packets: 1426100
Failed packets: 0
Truncated packets: 0
Retried packets (ENOBUFS): 0
Retried packets (EAGAIN): 0
Switching network driver for eth7 to normal mode... done!