Ethereal-users: Re: [Ethereal-users] No H323 conversations decoding with 802.1q frames

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Date: Wed, 9 Mar 2005 14:51:51 +0100


> 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 !!