Hi, I thought that accepting (or not) overlapping flows at the same priority was up to the controller? Isn't that what the check_overlap flag is for in flow_mod messages? -- Romain Lenglet
On Tuesday, February 22, 2011 at 16:00, Justin Pettit wrote: > I would expect so. One use that people have brought in the past is that you > could setup backup routes at a lower priority, with the higher ones timing > out or being forcibly removed. I don't know how useful that actually is, but > people have discussed doing that before with OpenFlow. > > In general, Ben and I have been fairly negative in the OpenFlow discussions > about putting in "sanity" checks at flow insertion time due to the complexity > and expense of enforcing them. There was quite a lengthy discussion a year or > so back about preventing users from being able to put overlapping flows at > the same priority--we lost that one. :-) > > --Justin > > > On Feb 21, 2011, at 10:52 PM, Derek Cormier wrote: > > > I expected that since the flow with the lower priority will never be > > matched over the higher one, it has no purpose and would not be added. > > > > Hmm, on second glance, the protocol says that if you add an identical flow > > that also has the same priority then the flow will just be replaced. > > But, I don't think it says anything about this case. Sorry, I should have > > confirmed that before posting. > > > > That said, do you think these identical flows should be allowed? > > > > - Derek > > > > On 02/22/2011 03:43 PM, Justin Pettit wrote: > > > I would expect that you can. What did you expect? What did you see? It's > > > not clear from this output if it's working or not, since neither counter > > > shows a value. Are you running traffic? > > > > > > --Justin > > > > > > > > > On Feb 21, 2011, at 10:35 PM, Derek Cormier wrote: > > > > > > > Should I be able to add two identical wildcarded flows with different > > > > priorities? I was talking with KK and he thinks this might be a bug. I > > > > always assumed this was just the way it works. Here is my ovs-ofctl > > > > flow dump: > > > > > > > > cookie=0x0, duration=94.608s, table_id=0, n_packets=0, n_bytes=0, > > > > priority=5,dl_type=0x0005 actions=drop > > > > cookie=0x0, duration=98.109s, table_id=0, n_packets=0, n_bytes=0, > > > > priority=1,dl_type=0x0005 actions=drop > > > > > > > > Thanks, > > > > - Derek > > > > > > > > _______________________________________________ > > > > dev mailing list > > > > [email protected] > > > > http://openvswitch.org/mailman/listinfo/dev_openvswitch.org > > > _______________________________________________ > dev mailing list > [email protected] > http://openvswitch.org/mailman/listinfo/dev_openvswitch.org >
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