Re: [lwip-users] Add support for outgoing VLAN tags?

[Dance, Brian]

Hi,

   I am very interested in support for outgoing vlan tags.   

   I had an outline plan to implement it myself. The plan was
   1. Add a field to the Netif structure for vlan id with default setting for 
no vlan.
   2. Add a function to allow the vlan field to be set.  This would only be 
called if the interface was to be associated with the vlan.
   3. Add code to use the netif structure vlan field to generate the frame vlan 
tag if the vlan field was set.

 If there is a plan to add outgoing vlan support  when might it be released?

Regards

Brian      

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Simon Goldschmidt
Sent: 01 November 2011 11:28
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Add support for outgoing VLAN tags?

"address@hidden" <address@hidden> wrote:

> Since 1.4, lwip supports incomming VLAN tagged frames.
> Is there any interest in also adding support for VLAN tagging of outgoing 
> frames for QoS purposes?

I guess it hasn't been added yet since no one knew how outgoing VLAN support 
should look like. for example, I wouldn't have thought that it would be useful 
to support different VLAN tags on the same IP address. Instead, I would have 
added multiple netifs each with their own IP address or subnet and assigned a 
VLAN tag to the netif.

Honestly, I wouldn't want to add a new argument in all the output functions for 
everybody for such a seldom used feature. Isn't there another way to implement 
this?

Simon
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