RE: 802.1Q ARP frame size?

> John C. Lin wrote:
> > (Sorry, if this is a FAQ)
> >
> > I noticed that the 802.1Q ARP frame size generated by the Linux
driver
> > (V1.8) is only 64 octets (not 68 octets).
> >
> > It seems the minimum frame size for 802.1Q is 68 octets.
> 
> The 64-octets is an ethernet physical level issue, not a VLAN issue,
so
> there is no need to pad the frame to 68 bytes.
> 

So what happens when a switch untags the vlan tag and sends the untagged
packet out a port? Is it the responsibility of the switch to then pad
the packet? Or does this just happen automatically anyway?

James