On Fri, Feb 08, 2013 at 12:08:06PM -0800, Murphy McCauley wrote: > I'd suggest that you try running POX's openflow.discovery component and see > if it works, since it would seem to do pretty much what you're trying to do > here (generate LLDP messages from scratch). If it works, check out the > messages it's generating and compare them with your own (you can use > openflow.debug to save it all as PCAP traces).
That was a very helpful suggestion. I ran openflow.discovery and I *did* see discovery messages received on the host connected to the switch port. However I was puzzled because the destination MAC address was 01:23:20:00:00:01, rather than the LLDP multicast address. Examing the disccovery.py code, I see that it's using the "Nicira Discovery Protocol" Multicast adress rather than the LLDP Multicast Address. I changed our code to use the NDP_MULTICAST address rather than LLDP_MULTICAST and now I see the packets generated by my code! So, now the question is why doesn't it like the LLDP_MULTICAST address? Is the openflow switch refusing to send these for some reason? Or perhaps the connected host running wireshark is eating them at a layer below where wireshark can see them? Or something else? -- Peter Fales Alcatel-Lucent Member of Technical Staff 1960 Lucent Lane Room: 9H-505 Naperville, IL 60566-7033 Email: peter.fa...@alcatel-lucent.com Phone: 630 979 8031 _______________________________________________ openflow-discuss mailing list openflow-discuss@lists.stanford.edu https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
