What the controller does with the packet-in is up to the controller 
application.  You'd need some application that understands you're trying to do 
discovery.  I'd recommend asking around on your controller's mailing list.

--Justin


On Feb 18, 2013, at 8:04 PM, vis reddy <[email protected]> wrote:

> Justin
> I did send the LLDP packets that are received to the controller as a flow 
> miss using packet in, the controller is sending an packet out with action 
> Type : output to switchport (0)
> Len : 8
> Output port : Flood (all physical ports except input port and those disabled 
> by STP)
> Max Bytes to send:65535
> #of Actions : 1
> 
> what does this mean and not sure why  controller is not realizing the links 
> even after sending the lldp packets as packet in.
> Thanks
> Vishnu
> 
> 
> From: Justin Pettit <[email protected]>
> To: vis reddy <[email protected]> 
> Cc: "[email protected]" <[email protected]> 
> Sent: Friday, 15 February 2013 1:38 PM
> Subject: Re: [ovs-discuss] how to report the links
> 
> I'm not sure I understand the question.  Depending on how you set up the flow 
> table, you can either explicitly send LLDP packets to the controller or let 
> them not hit any flow, which will send them to the controller.  You don't 
> need to set any capabilities.
> 
> --Justin
> 
> 
> On Feb 15, 2013, at 11:48 AM, vis reddy <[email protected]> wrote:
> 
> > Justin,
> > should the switch indicate something in the capabilities/features/some 
> > other way when the session is established,  if the controller can install a 
> > flow with the destination mac of lldp mac
> > on the switch it would be good. Is this the way or if the switch directly 
> > send the lldp packets will the controller accepts it?
> > Thanks
> > Vishnu
> > 
> > From: Justin Pettit <[email protected]>
> > To: vis reddy <[email protected]> 
> > Cc: "[email protected]" <[email protected]> 
> > Sent: Wednesday, 13 February 2013 6:25 PM
> > Subject: Re: [ovs-discuss] how to report the links
> > 
> > As I mentioned, you could just send the LLDP packets to the controller 
> > itself.  If you wanted to process them locally, you could store the 
> > information in the configuration database and have your controller get the 
> > information using the OVSDB protocol.
> > 
> > --Justin
> > 
> > 
> > On Feb 13, 2013, at 6:21 PM, vis reddy <[email protected]> wrote:
> > 
> > > Thanks Justin,
> > > How do we report a link connected to another switch, the switch has 
> > > detected all the neighbors by lldp. How should i send this info to the 
> > > controller.
> > > Thanks
> > > Vishnu
> > > 
> > > From: Justin Pettit <[email protected]>
> > > To: vis reddy <[email protected]> 
> > > Cc: "[email protected]" <[email protected]> 
> > > Sent: Wednesday, 13 February 2013 6:16 PM
> > > Subject: Re: [ovs-discuss] how to report the links
> > > 
> > > There's nothing built into OVS that will do this for you.  I've seen 
> > > solutions like running LLDP in the end-host and sending those packets to 
> > > the controller, or having the controller generate and handle probes 
> > > itself.
> > > 
> > > --Justin
> > > 
> > > 
> > > On Feb 13, 2013, at 6:02 PM, vis reddy <[email protected]> wrote:
> > > 
> > > > Hello All,
> > > > Could you please help to understand the following,
> > > > I am trying to figure out  how to report the links to the controller,
> > > > for example the switch has a physical connection to another switch on 
> > > > port P1 and a host on port P2
> > > > how should i report this to the controller, i do not see any message of 
> > > > this kinds.
> > > > This is required as the controller will know the topology based on this.
> > > > if there is already such a mechanism if some one point to the code it 
> > > > will be very helpful.
> > > > Thanks lot
> > > > 
> > > > _______________________________________________
> > > > discuss mailing list
> > > > [email protected]
> > > > http://openvswitch.org/mailman/listinfo/discuss
> > > 
> > > 
> > > 
> > 
> > 
> > 
> 
> 
> 

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