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Questions tagged [tcpreplay]

A suite of tools to edit and replay captured network traffic. It allows to classify traffic as client or server, rewrite Layer 2, 3 and 4 headers and replay the traffic back onto the network and through network devices.

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Network traffic recording-playback system

I am using tcpreplay and I need to synchronize two or more machines replaying recorded network traffic. Do You know how can I synchronize replaying pcap file on multiple hosts ? Maybe there is a better way than using tcpreplay? Thanks for answer.
Jakub
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How do I pump traffic using tcpreplay at 100 MBps, 500 MBps and 1Gbps speeds?

I used the -R and -K option but it doesnt seem to be working as I captured the pumped traffic using tcpdump and the number of packets that I see there dont seem to match the number of packets that I expect in the time frame.
kartz
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Want to run below tcpreplay using python code on Linux

Want to run below tcpreplay command using python code on Linux instance can you please give a working sample tcpreplay-edit -i ens7 -I ens8 --loop=20000 --enet-smac srcmac,dstmac --enet-dmac dstmac,srcmac -c /home/cache.cache /home/pcap.pcap…
Arun K
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How to replay packets using a specific source-destination port pair?

I have a pcap file with ISAKMP packets and the source port of the packet is a random port and the destination port is 500. I am trying to replay the packets using tcpreplay, but the packets are getting dropped at the receiving device because the…
N.C.
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Network interface drop 1518 bytes Ethernet frame received from direct Ethernet link cable sent by tcpreplay. why?

I have two server linked to each other. I tried to send a pcap from one of the servers via direct link using tcpreplay command. The pcap contains an HTTP POST session which size of some frames is 1518 bytes [Ethernet header(14 bytes)][payload(1500…
sajjad valaei
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How to correct all packet frame check sequences(FCS) of a pcap to send with tcpreplay?

I used pcap4j to manipulate pcap files in java. Unfortunately, pcap4j can fix all checksums except frame check sequence(FCS). I want to send pcaps using tcpreplay. I am looking for a tool, library or package that can resolve FCS of every packet in a…
sajjad valaei
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How to scale Cisco Joy capturing speed over 5 GBPS or even more

Currently I am capturing network packets using tcpreplay at a speed of 800 MBPS but I want to scale it over 5 GBPS. I am running Joy on a server with 16GB Ram and 8 Cores Tcpreplay Output: `Actual: 2427978 packets (2098973496 bytes) sent in 20.98…
Tushar Pasi
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Slow Ingestion of Network Packets

I am using a Packet Capturing and Analysis Tool named as Cisco Joy for generating network flows. Here is the link: https://github.com/cisco/joy So Joy is a Packet capturing and analysis tool which uses a configuration file to capture Packets on a…
Tushar Pasi
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Python Scapy execution problem with sendpfast

In Linux, I have a problem with scapy using sendpfast Is there anyone who experiences the same problem as me? I will be very grateful to someone who has a solution to this. my code after I implemented python on Linux terminal import sys from…
kyeong tak Lee
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How to simulate the exact same network traffic that was previoulsy recorded?

On Unix, how to simulate the exact same network traffic that was previously recorded? I have a LAN made of 2 machines: A local PC with interface eth0 and IP 192.168.1.1. On this PC runs a code C that listens to eth0, grab UDP packets and produce a…
fghoussen
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Rewrite pcap destination port with tcprewrite

I want to change the destination port from 18920 to 8080. I don't know which step is wrong.
zpzhuang
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tcpreplay cann't replay udp traffic/

I want to use tcpreplay to replay udp traffic ,but it doesn't work . I don't know which step mistake .
zpzhuang
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Use tcpreplay .pcap with raw packet data fail

I'm using tcpreplay to generate traffic from the .pcap file for my experiments. More specifically I'm using files from the ISCX-VPN-NONVPN-2016 public dataset. However, I'm having problems retransmitting encrypted traffic, as they present the L2 Raw…
Leandro Pereira
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replaying multicast UDP packet capture via tcpreplay not being seen by client

I'm having no joy in getting a replayed UDP Multicast packet to be "seen" by a client program on a different machine. Details: I have two machines on my local (wired) network connected through one unmanaged switch. One machine (running tcpreplay) is…
Sinistar
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tcpreplay how to add all pcap files under one directory to let the tcpreplay pcap files

the latest tcpreplay still only support to replay a file(files). for example the command is tcpreplay -i eth0 sample.pcap sample1.pcap I have over 100 pcaps that need to replay. they r all under folder is there a way to let tcpreplay plays all files…
crazy stone
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