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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 1 Dec 2011 08:57:01 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	"David Laight" <David.Laight@...LAB.COM>
Cc:	"Hagen Paul Pfeifer" <hagen@...u.net>,
	"Eric Dumazet" <eric.dumazet@...il.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH v3 net-next 2/2] netem: add cell concept to simulate 
 special MAC behavior

On Thu, 1 Dec 2011 16:38:51 -0000
"David Laight" <David.Laight@...LAB.COM> 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.
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html