[ovs-discuss] Flow table entry in openvswitch

[Gal Sagie]

Yes, i understand that thats the case from the code, what i would like to
know however is the use cases of such policies...
if anyone can explain them to me, or point me to a link/document i will
appreciate it.
(What i think is the switching between different physical entities and live
migration but thats only my guess) and i wanted to understand
how this works and if this is really the use case



On Thu, Aug 22, 2013 at 7:23 PM, Jesse Gross <jesse at nicira.com> wrote:

> On Thu, Aug 22, 2013 at 12:02 AM, Gal Sagie <gal.sagie at gmail.com> wrote:
> > Hello everyone,
> >
> > I am new to OpenVswitch and would like to ask a fundamental question
> > regarding the flow table.
> > I looked the code and saw it has a 12-13 tuple matching key (unless i
> miss
> > understood) which consist of MAC's src and dst IP's , TCP/UDP ports, TOS,
> > VLAN...
> >
> > What i am wondering is why is it not just L2 MAC's ? (with maybe support
> for
> > tunneling)
> > Are these flow entries used for openvswitch support of "distirubition
> > accross multipile physical networks"  and live migration?
> > (VM's on the same hypervisor cant have the same MAC's right? )
>
> Open vSwitch (and OpenFlow) is not just an L2 switch. Since it's
> possible to write policies against the upper layers, OVS needs to be
> able to match on them.
>



-- 
Best Regards ,

The G.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://openvswitch.org/pipermail/ovs-discuss/attachments/20130822/1cb4aa83/attachment.html>