[Nicolas.CLEMENTZ@xxxxxx]

> I.e., if you have a capture file with H.323 conversations in it, with
> 802.1q headers on the Ethernet packets, Ethernet doesn't recognize
them 
> as H.323 traffic?

Yes, but after anothers tests, I think thas the probleme
comes from the protocol from my equipment (Alcatel OmniPCX) and not from
the dissectors. A capture of frames without 802.1q doesn't work too. With
standard H323 applications (gnomeeting) it work's fine.

> Could you send us a sample capture?  That
*shouldn't* be happening, as 
> the dissectors for various H.323 protocols shouldn't do anything that's
> dependent on the link layer.
> Also, are you using a capture filter?  If so, note that if the
filter is 
> checking any fields other than the Ethernet MAC address field, you
need 
> to put "vlan" at the beginning of the capture filter - otherwise,
the 
> filter will check the Ethernet type field in the Ethernet header,
rather 
> than the 802.1q header, and won't recognize, for example, IP traffic.


Thank you !!