[ovs-discuss] Residual IP/ARP entry after a VM is powered off -> OVS passing unwanted pkts

Luiz Henrique Ozaki luiz.ozaki at gmail.com
Fri Sep 3 17:22:45 UTC 2010


Hmmm... Got it ! I think I need some cisco books... =]

Well, gonna try openflow rules then...

Thanks for explanations !

Best regards,

On Thu, Sep 2, 2010 at 8:30 PM, Ben Pfaff <blp at nicira.com> wrote:

> On Thu, Sep 02, 2010 at 04:24:58PM -0700, Martin Casado wrote:
> >  I think you have a basic misunderstanding of L2 learning.  A
> > typical switch pipeline operates as follows (ignoring bcast/mcast):
> >
> > - packet enters switch
> > - lookup destination MAC in L2 table
> > - if match, send it out of port associated with MAC table
> > - If unknown, flood the packet (along the associated broadcast tree)
> > and learn its MAC (associate with the ingress port)
> >
> > This is done for all packets, not just broadcast.
>
> ...except that broadcast packets skip the "lookup destination MAC" step
> and always get flooded.
>



-- 
[]'s
Luiz Henrique Ozaki
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