Hello All, I am wondering how neighbour discovery is done upon the Bootup? As much as I understand OpenFlow protocol, below two rules play an important role. [1] forward packets based on the action against a matching flow table entry [2] forward packets of unknown flows to the controller.
I tried reading through online materials and mailing list archives, but I am struggling to understand how the initial flow was added. Steps as I understand 1. Controller -> Switch (Hello) 2. Switch -> Controller (Hello) 3. Controller -> Switch (Feature Request) 4. Switch - > Controller (Feature Reply) 5. Controller -> Switch (Set Configure) 6. Switch -> Controller ( Packet_In message < Neighbour Solicitation (LLDP) reason (no matching action)>) 7. Controller -> Switch ( Packet_Out message <Neighbour Solicitation(LLDP)> action :Flood) Questions: 1. Is LLDP ON by default ? 2. Is LLDP is not ON by default, how is the switch instructed to trigger the same? 3. Once LLDP packet is on wire,is the rule [2] intrinsically defaulted in the switch? If not, then how does switch forward the packet to the controller based on rule [2] , is this flow inserted in step 5? Cheers! Durga
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