Thank you Aaron, I would like in the beginning to set my switch to do nothing, meaning not to forward any traffic if I don't have the controller started or flows installed.
Then I would like to use NOX and set some flows or set them directly with dpctl. Now, if I use a flag OFP_FLOW_PERMANENT dose it mean the flow is installed after I close the controller? (this is how I would expect it to be) Making the switch "fail closed" is a setting of the switch or of the openflow protocol? Thanks again for the reply! Best, Diana On Thu, May 31, 2012 at 10:16 AM, Aaron Rosen <aro...@clemson.edu> wrote: > That means that the switch fails open aka will act as a normal L2 learning > switch if it loses its connection with the controller. > > From the 1.0 spec -- NORMAL: Process the packet using the traditional > forwarding path > supported by the switch (i.e., traditional L2, VLAN, and L3 processing.) > The switch may check the VLAN ld to determine whether or not to > forward the packet along the normal processing route. If the switch can- > not forward entries for the OpenFlow-speci c VLAN back to the normal > processing route, it must indicate that it does not support this action. > > > What do you mean by dumb? There should be a way to make it fail closed, > meaning that it will no longer forward traffic automatically when it loses > it's connection to the controller. This is particularly important if you > have loops in the openflow segment of a network. > > Aaron > > On Thu, May 31, 2012 at 2:54 AM, Diana Marosin <marosin.di...@gmail.com>wrote: > >> Hello all, >> >> I've been using a bit of Mininet and you know that when just creating a >> network and trying to ping for example this dosen't work, Than you start >> the controller and miracle happens. On the other hand on real devices >> (Linksys and TP-link with openwrt and openflow 1.0) this is not the case. >> >> Dose any of you know what is the *default* behavior? I guess it is >> broadcasting. And also, how I could stop it? >> can I install flows to drop packets? >> is there any configuration file that makes my switch totally dum?, >> on TP-LINK it seams I have a flow table without using the controller, and >> it has actions=LOCAL, what dose it mean? >> >> Thank you a lot! >> Diana >> >> >> _______________________________________________ >> openflow-discuss mailing list >> openflow-discuss@lists.stanford.edu >> https://mailman.stanford.edu/mailman/listinfo/openflow-discuss >> >> >
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