Hi Do you have any suggestions for me to solve this issue about wrong number of packets shown??
Regards Jishnu -----Original Message----- From: Unnikannan Nair, Jishnu Sent: 24. juli 2015 02:48 PM To: 'Vadim Kochan'; '[email protected]' Subject: RE: [netsniff-ng] captured packets Hi I connected an old COTS sniffer, used by our network team to check if it was fault with network, but that sniffer can capture the whole packets as said by tcpreplay, where as netsniff-ng still shows a lower value, while it doesn't show any packet drops. Regards Jishnu -----Original Message----- From: Vadim Kochan [mailto:[email protected]] Sent: 24. juli 2015 01:25 PM To: Unnikannan Nair, Jishnu Cc: '[email protected]' Subject: Re: [netsniff-ng] captured packets On Fri, Jul 24, 2015 at 11:01:48AM +0000, Unnikannan Nair, Jishnu wrote: > Hi > I'm trying to check if there are any packet loss going on when doing a packet > capture dump using netsniff-ng using tcpreplay. I used netsniff to log the > verbose output of the whole capture and check if there any dropped packets. > The log shows zero dropped packets. So I used a script to add all the packets > captured by netsniff-ng but it seems the value I got is not the same as the > value shown by tcpreplay at the end of the capture, Why is that?? > TCP replay send 27388000 and netsniff-ng gets 27386202 with zero dropped > packets on the log file. > > > TCPreplay : > > tcpreplay -i eth1 -M 90Mbps --loop 100 --preload-pcap --sleep-accel=1 > /share/capture/job1/*.pcap > Output: > Actual: 27388000 packets (13649364800 bytes) sent in 1173.92 seconds. > Rated: 11627168.0 bps, 88.71 Mbps, 23330.38 pps > Statistics for network device: eth1 > Attempted packets: 27388000 > Successful packets: 27388000 > Failed packets: 0 > Retried packets (ENOBUFS): 0 > Retried packets (EAGAIN): 0 > > Netsniff-ng: > > netsniff-ng -d eth1 --out=/share/capture/ --prefix="job1_" -s -ring-size 4096 > --interval 2MiB -f "dst net 224.10.10 or dst net 224.11.11" -b 1-4 -V > > /share/capture.log > > capture log : > > > pcap file I/O method: scatter-gather > RX,V3: 4096.00 MiB, 65536 Blocks, each 65536 Byte allocated > IRQ: eth1:19 > CPU4 > Running! Hang up with ^C! HI, What is the netsniff-ng version which is used in this particular example ? Or it was compiled from the up-to-date sources ? -- You received this message because you are subscribed to the Google Groups "netsniff-ng" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
