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


Does anyone know how to convert a text file to a PCAP? This is not a hex dump, it is a raw text file of what would be in a typical PCAP. The device im capturing from (ASR5000) displays the trace output in window with no ability to write it to a file so I have no ability to specify like i would in a normal tcpdump. I need to be able to get this file into a PCAP or other format that is usable in Wireshark. The customer is having a really hard time with the text file since they are not used to traces looking like this.

A small example excerpt is below, any help is greatly appreciated.

Friday July 01 2016 INBOUND>>>>> 22:10:04:544 Eventid:87730(18)

===> Radio Access Network Application Part (RANAP) (54 bytes) RANAP PDU | 0... .... | Ext bit : 0 | .00. .... | Choice index : Initiating Message (0) Procedure Code : id-Direct Transfer (20)

asked 01 Jul '16, 16:24

Dave16's gravatar image

accept rate: 0%

Unfortunately, I know of no tools that "undo" the formatting and attempt to figure out what the raw binary data is; that's what would be needed here. Unless there's some command that I missed in a quick search of the command line reference, you may be completely out of luck here.

permanent link

answered 01 Jul '16, 17:51

Guy%20Harris's gravatar image

Guy Harris ♦♦
accept rate: 19%

Thanks for the reply, I went through the CLI reference also. This is the only NE I have ever worked with that behaves like this when tracing.

found this also which i found pretty funny

(01 Jul '16, 21:51) Dave16
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: 01 Jul '16, 16:24

question was seen: 1,120 times

last updated: 01 Jul '16, 21:51

p​o​w​e​r​e​d by O​S​Q​A