Ethereal user support <ethereal-users@xxxxxxxxxxxx> schrieb am 18.10.05 19:15:55:
>
> mark.dixon wrote:
> > I'm looking to capture HDLC packets between two CISCO routers.
>
> If that's "Cisco HDLC", then
>
> 1) it's not really HDLC in the full sense of the word (no "control"
> field, for example) - it's probably just using the low-level
> bit-stuffing and framing of HDLC;
>
> 2) Ethereal can already dissect it;
>
> 3) if you can run Ethereal (or Tethereal or tcpdump) on a machine
> that's an endpoint of the CHDLC traffic (which, if it's a Cisco router,
> you probably can't), you might be able to capture on an interface that's
> a source or sink of the traffic, if the OS supports it ("endpoint" here
> doesn't mean, for example, IP-layer endpoint, as the router probably
> turns some of the traffic into Ethernet traffic and processes other
> traffic, such as SLARP, internally);
>
> 4) otherwise, you might be able to use an Endace DAG card to do
> "third-party" passive capture of the traffic, if your OS supports that
> (they support Linux and possibly also FreeBSD and Windows).
>
Hmmm, adding some of this to http://wiki.ethereal.com/CaptureSetup/CiscoHDLC?
Regards, ULFL
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