Hello all, I have a capture file where i used wireshark to capture the skype voice chat between 3 persons. I need to measure the latency. That is the time a packet takes to travel from source to destination. How to go about seeing this? Thank You Vin asked 25 Jan '11, 14:59  magnetpest2k5 |
2 Answers:
(After re-reading your question ;-) I think you have to go the Iperf or Jperf UDP test route in a client/server relationship. It's all about how accurately you can sync your timeclocks because UDP is connectionless. In TCP, you could measure the time between the SYN and SYN/ACK. If it was a VOIP call, you could analyze the RTP streams. Visualware has some good info on latency statistics as well as a UDP measurement called MyCapacity. But with UDP, you're kinda stuck. I have a skype trace file and did some graphing with frame.time_delta_displayed. It gives you a good picture of the delays but I don't think it's really accurate as far as a proper speedtest because of the timing issues. If you and your friends are using those nifty Mikrotik RB750s, you can do a UDP test with it's Btest. answered 25 Jan '11, 16:34  RobertM edited 25 Jan '11, 17:39 |
I'm guessing you mean the timestamps of skype and not wiresharks timestamps? I don't have that trace with me right now but this should help: "Skype analysis" answered 26 Jan '11, 08:51 RobertM edited 26 Jan '11, 08:52 Thank You that was informative. The article shows the departing time for voip packets. Can you tell me how can I get the departing time of packets in my case. Wireshark does show the arrival time of the captured packet but not the departure time. (26 Jan '11, 12:22) magnetpest2k5 |
Thank You for the information. I have one more question is there any way we can see the time stamps of the udp packets?