Re: [Openvpn-devel] [PATCH 4/9] vlan: Prepend and remove VLAN identifiers on outgoing and incoming frames

[Jan J. K. <ja...@ni...>]

Fabian Knittel wrote:
> Peter Stuge schrieb:
>   
>> Fabian Knittel wrote:
>>     
>>> +  if (ntohs (vlanhdr.tpid) != OPENVPN_ETH_P_8021Q)
>>> +    {
>>> +      /* Drop untagged frames */
>>> +      goto err;
>>> +    }
>>>       
>> It would be nice to be able to use VID 0 to mean untagged packets.
>>     
>
> Hm, nice idea.  I'll implement it in my next round of patches.
>   
FYI: 802.1Q defines VLAN 1 as the 'native' LAN: all packets on VLAN 1 
are *by definition* not encapsulated (according to my CCNA guide ;-))
VID 0 means "priority frames"
Perhaps we need to make sure that VID 1 means untagged ...

For more details, see http://www.javvin.com/protocolVLAN.html

cheers,

JJK