On Wed, 29 Sep 2004 19:45:19 -0400, Jim Gifford <baadpuppy at gmail dot com> wrote:
> I've personally never experienced this problem.  What brands of
> switches exhibit this broken behavior?
> 
> I've tested VLANs on some models of Cisco and on the summit and alpine
> models of Extreme switches and never saw traffic I shouldn't have.
> 
> I would love to know which switches do this wrong so I don't make the
> mistake of buying one.
> 

I've also never seen this problem.  Of course if the VLAN's aren't
configured right, that'll happen no matter what switch you're using. 
:)  I'd say misconfiguration is far more likely than a problem in the
switch itself causing that, at least from what I've seen.

Presentation on layer 2 security from Cisco here -
http://www.cisco.com/security_services/ciag/documents/bh-us-02-convery-switches.pdf
Some interesting stuff in there.  

-Chris