OSQA is unmaintained. Help us figure out where to go from here.

Hello everyone,

I want to make a RTT graph for whole communication between two IP addresses and when I do 'Conversation Filter->IPv4' then i got all communication between this two IP addresses, but now when I do RTT Graph it's show me the RTT for certain Stream and NOT for whole communication between this two IPv4 addresses. Is it possible to make some RTT graph for whole communication?

Thank you in advance.

asked 19 May, 07:05

Nicola%20Tesla's gravatar image

Nicola Tesla
113
accept rate: 0%


You can try to use the I/O Graph for that kind: If you put in the IPv4 conversation into the filter field and plot the max value of the tcp.analysis.ack_rtt field at Y-axis. And I suggest to set plot interval to a value less then 1 sec. alt text

permanent link

answered 19 May, 12:19

Christian_R's gravatar image

Christian_R
1.8k1524
accept rate: 16%

edited 2 days ago

Christian_R Thank you, this is what I want to do, but please, can you explain what is the difference between 'tcp.analysis.ack_rtt' and 'tcp.time_delta'. I suppose that 'tcp.analysis.ack_rtt' is RTT just for ACK packet and 'tcp.time_delta' is the time delay in one direction, but if this is true, then how we can find the RTT for every packet and not just for ACK.

Thank you in advance. :)

(2 days ago) Nicola Tesla
1

RTT means time between packet is send and answer comes back tcp.time_delta is just the time between two packets in the trace. Think about the sender sends 5 packets in the row. The best RTT measurement for the network is iRTT which measures how fast the 3way handshake is done. But it is measured only once.

ACK_RTT is from point of view the best you can get even naggle and delayed ack are activated. ACK_RTT measures the speed how fast a segement has been ACKed. Think about that every segment contains is always an ACK, too.

(2 days ago) Christian_R
Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported

Question tags:

×71
×27

question asked: 19 May, 07:05

question was seen: 81 times

last updated: 2 days ago

p​o​w​e​r​e​d by O​S​Q​A