Re: VLAN, Linux, and raw sockets

Peter Stuge wrote:
> On Wed, Mar 23, 2005 at 02:39:17PM -0500, [email protected] wrote:
> > ...
> > I've tinkered with this a little and what I seem to find is that if
> > my switch sends tagged frames to the Linux system, system services
> > (arp, etc.) don't work.  I'm guessing that they don't know what to
> > do with tagged frames and that he frames aren't stripped.
> 
> VLAN is implemented in the physical layer. It might help to think of
> it as a virtual NIC driver. (Although it isn't implemented that way.)
> VLAN interfaces are no different from other interfaces. But you have
> to add the VLAN interfaces before Linux will function on the VLANs.
> ...
> > The problem I'm having is getting system services to ignore (or not
> > see) tags.
> 
> Perhaps we could help more if we knew what your goal was. Why do you
> want to look at the VLAN tags?

I'm trying to write a VLAN-aware IGMP router...more or less.