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

If we capture packets using tcpdump or Wireshark with a length less than the MTU (length < 1500) -(For example, 74, 108, 788... etc) - is it fair to say that it means there is tcp congestion?

asked 17 May, 04:45

armodes's gravatar image

armodes
16181923
accept rate: 0%


No. That may only be something to think about if you know that there is a big data transfer with such a volume that all packets can be filled completely up to MSS. If an application has only a few bytes to send it will do that, and it's not because of congestion.

Take SSH/Telnet for example: pressing a key will send a small packet containing that key (and a few other things), but it's simply a small packet, and not congestion.

permanent link

answered 17 May, 04:50

Jasper's gravatar image

Jasper ♦♦
23.8k551284
accept rate: 18%

OK thank you Jasper. I am using iperf to send a traffic and i was wondering about it.

(17 May, 05:14) armodes
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
×46
×29
×16

question asked: 17 May, 04:45

question was seen: 361 times

last updated: 17 May, 05:14

p​o​w​e​r​e​d by O​S​Q​A