This is our old Q&A Site. Please post any new questions and answers at ask.wireshark.org.

Based on my understanding, [TCP Previous segment not captured] means the following:

  1. I receive packet 1.
  2. Now instead of receiving packet 2, I receive packet 3 (so packet 3 will be marked with [TCP Previous segment not captured]).

But does [TCP Previous segment not captured] indicates that something went wrong? I mean isn't it normal for the packets not to arrive in order, and it's the job of TCP to reorder them?

asked 27 Jul '15, 12:33

John_857's gravatar image

John_857
16336
accept rate: 0%

edited 27 Jul '15, 12:33


Yes and no. If you see a TCP Out-Of-Order within one RTT or so, then generally speaking it is a bit annoying but not the end of the world. If you don't, then you should start looking further.

To see if it is really causing you an issue you can look at the throughput (Statistics / IO Graph.) If there is a sudden drop or pause in throughput at the same time, you may have an issue, other than that I wouldn't worry too much.

permanent link

answered 27 Jul '15, 13:01

DarrenWright's gravatar image

DarrenWright
216141520
accept rate: 26%

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:

×1,620
×752
×254

question asked: 27 Jul '15, 12:33

question was seen: 2,766 times

last updated: 27 Jul '15, 13:01

p​o​w​e​r​e​d by O​S​Q​A