I have read that wireshark can be interfaced with NetSim. Does this capture the flow in all nodes or can it be enabled for a particular node?
I would like to know how to capture a pcap file from Netsim and then see the TCP graph in wireshark?
- Enable wireshark at the node in study
- After capture open the pcap file from the results dashboard
- Choose statistics --> TCP Stream Graph --> Window Scaling
Thank you Akash and Abhishek. I am able to generate the TCP graph. It is quite simple.
The next question is, if I have intermeidate devices, can I find out the route taken by the packet in NetSim by analyzing the pcap file?
Wireshark captures are confined to a single device and contains entries of incoming and outgoing packets specific to that device only. Unless the protocol headers maintain any route record, it is not possible to find the route of a packet using Wireshark in NetSim.
However, the route taken by packets can conveniently be found out from NetSim's packet trace log file. NetSim packet trace would log the flow of each packet, as it moves up and down the network stack in each device and as it flows between the devices. It can be thought of like an amalgamation of wire-shark captures from each device and then consolidated at a network level.
Packet trace needs to be enabled prior to the simulation and can be opened from the results dashboard after the simulation. After opening the packet trace file filter and select a specific PACKET_ID to trace the path through which the packet was sent.
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