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

The GRE Protocol Type 0x2000 is used by Cisco gear to encapsulate CDP frames. What would be the easiest way to modify the GRE dissector to interpret the Data within the GRE payload as a CDP frame when the GRE Protocol Type is 0x2000 ?

asked 18 Apr '15, 01:08

w1zard's gravatar image

accept rate: 0%

Hi, You should make the CDP dissector register in the "gre.proto" dissector table. If you raise a bug and attach a sample trace it should be easy to implement.

permanent link

answered 18 Apr '15, 10:27

Anders's gravatar image

Anders ♦
accept rate: 17%

Your answer
toggle preview

Follow this question

By Email:

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



Answers and Comments

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "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:


question asked: 18 Apr '15, 01:08

question was seen: 2,004 times

last updated: 18 Apr '15, 10:27

p​o​w​e​r​e​d by O​S​Q​A