Ethereal-users: Re: [Ethereal-users] ISDN

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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Sat, 16 Aug 2003 17:20:43 -0700
On Wed, Aug 13, 2003 at 08:10:51AM +0300, Willy Robinson wrote:
> Does anyone know if the latest version of ethereal can capture over an
> ISDN connection ?

As is often the case, the answer is "it depends".

Ethereal itself doesn't do the low-level work of capturing packets - it
relies entirely on the libpcap/WinPcap library, and the mechanism that
library uses, to do packet capture.

Currently, the mechanisms libpcp/WinPcap uses don't support capturing
"raw" ISDN traffic (B-channel and D-channel frames), so you can't do
that.

On some OSes, it might allow capturing of PPP traffic running over an
ISDN line.

Ethereal can read raw ISDN traffic captures that the isdn4bsd mechanism
can produce, although, never having used it, I don't know how one
produces an i4btrace capture.