Thank you!
On Tue, Mar 15, 2016 at 4:33 PM, Eder Leão Fernandes < ederleaofernan...@gmail.com> wrote: > No, > > actually what it says is that flows are not deleted by the switch when > there is a port change. > It is up to you (The controller/app) to remove/update/add new flows that > reflect that change. > > Regards, > Eder. > > > On Tue, Mar 15, 2016 at 9:02 AM Daniel Khankin <khd...@gmail.com> wrote: > >> Hello, >> >> From OpenFlow specification 1.5, part 4.6 - "Port Changes" (page 17): >> >> [Quote] >> "A switch configuration, for example using the OpenFlow Configuration >> Protocol, may add or remove >> ports from the OpenFlow switch at any time. The switch may change the >> port state based on the >> underlying port mechanism, for example if the link is going down (see >> 7.2.1). The controller or a >> switch configuration may change the port configuration (see 7.2.1). Any >> such changes to port state or >> configuration must be communicated to the OpenFlow controller (see 7.4.3). >> >> Port addition, modification or removal never changes the content of the >> flow tables, in particular flow >> entries referencing those ports are not modified or removed (flow entries >> may reference ports via the >> match or actions). Packet forwarded to non-existent ports are just >> dropped (see 5.6). Similarly, Port >> addition, modification and removal never changes the content of the group >> table, however the behaviour >> of some groups may change through liveness checking (see 6.7). >> >> If a port is deleted and its port number is later reused for a different >> physical or logical port, any >> remaining flow entries or group entries still referencing that port >> number may be effectively re-targeted >> to the new port, possibly with undesirable results. Therefore, when a >> port is deleted it is left to the >> controller to clean up any flow entries or group entries referencing that >> port, if needed." >> >> If I correctly understand, it means that I can't modify existing flow >> entries upon adding or removing a port. >> Can I add a new flow entry when a new port is added ? >> >> Thank you >> >> >> _______________________________________________ >> openflow-discuss mailing list >> openflow-discuss@lists.stanford.edu >> https://mailman.stanford.edu/mailman/listinfo/openflow-discuss >> >
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