Subject: Re: [PATCH v3 net-next 2/2] netem: add cell concept to simulate special MAC behavior

From: Stephen Hemminger <[email-masked]>
Date: Thu, 1 Dec 2011 08:57:01 -0800

On Thu, 1 Dec 2011 16:38:51 -0000
"David Laight" <[email-masked]> wrote:

>  
> > One idea to do small delays at higher speed is to insert 
> > dummy pad frames into the device.
> > It would mean generating garbage, but would allow for
> > highly accurate fine grain delay.
> 
> Not a good idea.
> They would have to be sent to a known MAC address
> otherwise all the ethernet switches would forward them
> on all output ports.
> 
> 	David
> 
> 

Yes it would have to be a constant destination, not sure if there
is a discard value in Ethernet protocol spec.