Ethereal-users: Re: [ethereal-users] can I see PPP inside L2TP packets?

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From: Gilbert Ramirez <gram@xxxxxxxxxx>
Date: Mon, 5 Jun 2000 09:21:32 -0500
On Mon, Jun 05, 2000 at 06:35:15AM -0500, Luca Risso wrote:
> 
> 
> 
> 
> Here is the sample trace file of a L2TP connection between two PCs.
> 
> LAC IP address is 172.16.175.110
> LNS address is 172.16.246.176
> 
> The trace contain the following actions:
> - LAC opens a new tunnel
> - LAC opens a new call (PPP peers: 172.16.175.106 <---> 172.16.175.107)
> - LAC sends a couple of ping over PPP connection (packets 60-61, 63-64)
> - LAC closes the call
> - LAC closes the tunnel
> 
> No PPP protocol info seems to be shown into the L2TP packet and also the 
> data
> parts of packet number 60 and 63 (ping) doesn't appear in bold font as 
> usual.


Thanks. I need to read RFC 2661 (LT2P) tonight. Currently the L2TP dissector
does not call the PPP dissector; I need to figure out in which cases it needs
to.

--gilbert