On May 20, 2014, at 1:51 AM, durga <c.vijaya.du...@gmail.com> wrote:
> Hello All, > > This question is w.r.t LLDP . Upon bootup - controller instructs switch to > 'packet-out' LLDP protocol on its interface. Lets say SW1, P1. If the > topology is SW1.P1<—> SW2.P2, I would expect SW2 to send an OF message to the > controller with payload of the LLDP received from SW1.P1. That way the > controller can establish that SW1.P1 is indeed connected to SW2.P1. Right. > But when I run openflow/discovery.py , I notice that SW2.P1 is sending an > LLDP packet with its own details iw SW2.P1 and not SW1.P1 , What makes you think that? It shouldn't be the case. > may be my understanding is incorrect, but how exaclty is the controller able > to conclude SW1.P1 is connected to SW2.P1? > > controller logs: > > INFO:openflow.of_01:[None 6] closed > INFO:openflow.of_01:[00-00-00-00-00-01 7] connected > DEBUG:discovery:Installing flow for 00-00-00-00-00-01 > INFO:openflow.of_01:[00-00-00-00-00-02 8] connected > DEBUG:discovery:Installing flow for 00-00-00-00-00-02 > INFO:discovery:link detected: 00-00-00-00-00-01.2 -> 00-00-00-00-00-02.2 > INFO:discovery:link detected: 00-00-00-00-00-02.2 -> 00-00-00-00-00-01.2 > > > screenshot: > > > > Cheers! > Durga >
