hi Yiannis, I think it's a place of ambiguity in the spec, perhaps. for example, with the indigo switch firmware (OF 1.0), if there's a cable plugged-in, and I pull it out, then I see OFPPS_LINK_DOWN in the modified port description. if there's a cable plugged-in, and from the switch OS, I do an 'ifconfig down', then I see both OFPPS_LINK_DOWN and OFPPC_PORT_DOWN in the ofp_port_status message.
it seems to me that a controller would definitely want to be notified if the link between, say, two switches went down. anyway, like you said, hopefully this is all clear in the newer versions of the spec. :-) cheers, Andrew ps -- from a quick skim, this looks like the relevant code: https://github.com/bigswitch/iods/blob/master/indigo-core/openflow/udatapath/datapath.c#L1266 but maybe I'm misreading things. On May 16, 2013, at 3:58 AM, Yiannis Yiakoumis wrote: > Hi Etienne, > > You are not supposed to get a PORT_DOWN when you remove the cable, it's when > it's when "port is administratevely down". (I think there is a link-down bit > in newer versions of the spec that would capture this). To change the status > of a port you can send an openflow port-mod message. > > What is your use case? Would a topology/host discovery on the controller help > here? > > Regards, > Yiannis > > > On Wed, May 15, 2013 at 10:36 AM, Etienne Mula <etiennem...@gmail.com> wrote: > Hi All, sorry for sending another email however i have a strange thing > happening on the WR-1043ND. Basically when disconnecting a client > irrispective if by cable or issuing ifconfig eth0 down, the AP doesnt send > any port down notifications to the controller. I've checked thorugh wireshark > and infact i confirmed that these are not being recieved. Any ideas why this > is happening please ? > > > Regards > Etienne > > _______________________________________________ > openflow-discuss mailing list > openflow-discuss@lists.stanford.edu > https://mailman.stanford.edu/mailman/listinfo/openflow-discuss > > > _______________________________________________ > openflow-discuss mailing list > openflow-discuss@lists.stanford.edu > https://mailman.stanford.edu/mailman/listinfo/openflow-discuss
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