Ethereal-users: RE: [Ethereal-users] HDLC Capture

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

From: "mark.dixon" <mark.dixon@xxxxxxxxx>
Date: Tue, 18 Oct 2005 13:04:19 +0100
I'm looking to capture HDLC packets between two CISCO routers.

I've been asked to practically assess the difference between CISCO HDLC and
3COM HDLC as part of a university assignment.

It's really just there to support the theory and documented evidence
available on the subject.


-----Original Message-----
From: ethereal-users-bounces@xxxxxxxxxxxx
[mailto:ethereal-users-bounces@xxxxxxxxxxxx] On Behalf Of Guy Harris
Sent: 18 October 2005 12:37
To: Ethereal user support
Subject: Re: [Ethereal-users] HDLC Capture

mark.dixon wrote:

> I'm trying to find out how to capture and display HDLC packets - can 
> anyone help?

For capturing:

	What type of link is the HDLC traffic being sent?

You might be able to capture it using a DAG card from Endace Measurement 
Systems:

	http://www.endace.com/

However, you'd also need to introduce a new DLT_ value for that capture 
type, if it's not "Cisco HDLC" or "PPP in HDLC-like encoding".

Then Ethereal would have to be modified to be able to recognize that 
DLT_ value as "generic HDLC", and you'd need to write a dissector that 
registered to dissect that "generic HDLC".

What's running on top of HDLC in your application?

_______________________________________________
Ethereal-users mailing list
Ethereal-users@xxxxxxxxxxxx
http://www.ethereal.com/mailman/listinfo/ethereal-users

-- 
This message has been scanned for viruses and dangerous
content by the NorMAN MailScanner Service and is believed
to be clean.

The NorMAN MailScanner Service is operated by Information
Systems and Services, University of Newcastle upon Tyne.


====
This e-mail is intended solely for the addressee. It may contain private and
confidential information. If you are not the intended addressee, please take
no action based on it nor show a copy to anyone. Please reply to this e-mail
to highlight the error. You should also be aware that all electronic mail
from, to, or within Northumbria University may be the subject of a request
under the Freedom of Information Act 2000 and related legislation, and
therefore may be required to be disclosed to third parties.
This e-mail and attachments have been scanned for viruses prior to leaving
Northumbria University. Northumbria University will not be liable for any
losses as a result of any viruses being passed on.