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

I did a capture with wireshark on the port where our Cisco 3500 AP is connected and I have a ton of errors for the CAPWAP header.

The "Expert Info" Message is (Warn/Malformed): Wrong Calculate length (11) =! header lenght (15) ! (May be try to use Cisco Wireless Controller Support Preference ?)

I did a capture at the end of the day when I was the only one in the office (PC, iPhone, a couple of iPads) and I did it during the middle of the day with a good number of clients connected a lot more Apple products. It seems to have a lot more of those errors with apple devices. In fact, that is how I fist noticed it. I was trying to trouble shoot an AP that was dropping apple products.

Is this message stating that WireShark is calculating that the header to be a certain length and it's actual length is different thus giving the warning?

Has anyone here encountered this problem and if so do you have a fix?

asked 25 Sep '13, 18:45

djroge1's gravatar image

djroge1
1111
accept rate: 0%

I have same errors (from time to time). Have no idea why it is like this... at least now.

(19 Dec '13, 14:37) Yakuza
Be the first one to answer this question!
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:

×139
×43
×7

question asked: 25 Sep '13, 18:45

question was seen: 2,167 times

last updated: 20 Dec '13, 02:34

p​o​w​e​r​e​d by O​S​Q​A