Hi Victor, > 1) Does FlowVisor updates its FlowDB as OF Messages pass through it? Or does > it asks directly the switches for their Flow Tables? Reading the source code > I'm inclined to think of the first option.
You are mostly right. Flowvisor stores a cache of the flowtable which it refreshes at most every 30s (this is configurable in versions 1+ of FV). One important note is that flowmods are not stored when they are pushed down by a controller, but rather they are periodically read from the datapath. > > 2) I would like to be able to keep a certain controller from installing or > modding Flows that change the VLAN Tag of a packet, for instance. Can you > point out a direction to do this? I was investigating the source code, but > I'm not sure if I should try to implement a new Callback type or something > like that. FV will disallow a controller from pushing or modding a vlan tag if either that vlan tag is not in the flowspace associated to that controller or if dl_vlan is set to none. > > If I get to any results I would gladly pull it in the future. > That would be fantastic. Let me know if you need more help. > > Big thanks! > > Victor T. > > > On 30 August 2013 18:46, Ali Al-Shabibi <ali.al-shab...@stanford.edu> wrote: >> Hi Victor, >> >> Currently, you cannot specify which openflow actions are allowed on a per >> flowspace basis. This is clearly a desirable feature but unfortunately we >> have not addressed it yet. We would welcome any pull requests/contributions >> in this direction. >> >> Cheers. >> >> -- >> Ali >> >> On Aug 30, 2013, at 11:58 AM, Victor Torres <vit...@poli.ufrj.br> wrote: >> >> > Hello, >> > >> > Does anybody know if it is possible to define allowed/denied actions for >> > slices in FlowVisor? >> > >> > >> > Best regards, >> > >> > Victor T. >> > _______________________________________________ >> > 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
