Re: 802.1qinq/802.1ad ethertypes

[Jaap Keuter <jaap.keuter () xs4all nl>]

On 02/12/2014 07:40 PM, Florian Lohoff wrote:
> On Wed, Feb 12, 2014 at 05:30:20PM +0100, Alexis La Goutte wrote:
> > Hi,
> >
> > > From old conversation on -users :
> >
> > Check the VLAN preferences. There is an entry for the 802.1QinQ Ethertype,
> > which by default is 9100.
> >
> > http://www.wireshark.org/lists/wireshark-users/200801/msg00144.html
>
> What happens if i have a qinq stack (tripple, quadruple whatever)
> which contains old style ethertypes 9100, 9200, 9300 in that order?
>
> Flo

That won't work. There's only a single Ethertype you can set for old style
Q-in-Q tunneling.

As for your sample capture, setting Q-in-Q preference of the VLAN dissector to
'9200' works perfectly.

Thanks,
Jaap


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