Please let me explain what VTN project needs from the OFP-Lithium more precisely.
VTN project needs a way to get latest information about flow entries in OpenFlow switches. Should I file this into the Bugzilla? With the OFP-Helium, VTN project can use the "get-flow-statistics-from-flow-table" RPC for this purpose. On the "get-flow-statistics-from-flow-table" RPC, the OFP-Helium sends OFPT_STATS_REQUEST messages to an OpenFlow switch, if I understand correctly, so VTN project's features can get the latest information. There are two use cases for the RPC. First, the VTN features need this RPC to correctly control OpenFlow switches. When an ODL controller in which the VTN features runs newly connects with an OpenFlow 1.0 switch, the VTN features check flow entries in the switch by calling the RPC. And if the VTN features find flow entries which are not necessary, it deletes the entries to avoid causing unexpected behaviors. For OpenFlow 1.3 switches, the VTN features do not need the "get-flow-..." RPC, because it can delete all entries using cookie mask without knowing flow entries in switches. But, OpenFlow 1.0 switch does not support the cookie mask, so the RPC is needed. Second, the VTN features need the "get-flow-..." RPC to show statistics of flows to users. (The vtn-flows:get-data-flow RPC provides that functionality to users.) That's why the VTN features need a way to get latest flow entries in the OFP-Lithium. Regards, Hideyuki Tai > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Tai, > Hideyuki > Sent: Wednesday, January 27, 2016 10:45 > To: Jamo Luhrsen <[email protected]>; Michal Rehak -X (mirehak - > PANTHEON TECHNOLOGIES at Cisco) <[email protected]>; openflowplugin- > dev <[email protected]> > Cc: '[email protected]' <[email protected]> > Subject: Re: [openflowplugin-dev] Request for the stats RPC in the OFP-Li > > Hi Jamo, > > > Hideyuki, > > > > if it was enabled by default, does that solve your problem for now? > > Yes. > If it is enabled by default, that solves the critical problem which VTN > project are > facing with the OFP-Li. > Actually, that's the biggest problem for VTN. > If it's enabled by default today and there are no other critical bugs in the > OFP-Li, > we can say it is not impossible to migrate to the OFP-Li by Beryllium RC3. > > Anyway, we need more time to test the OFP-Li to detect bugs before the > migration. > Especially, we are still not sure why installing and uninstalling flow > entries is so > slow with OFP-Li. > > FYI, now VTN project is busy to test the VTN project's feature with the > OFP-He. > As you know, the OFP-He also has some issues, and we want all issues in OFP- > He are fixed by Beryllium release. > > Regards, > Hideyuki Tai > > > -----Original Message----- > > From: Jamo Luhrsen [mailto:[email protected]] > > Sent: Wednesday, January 27, 2016 09:29 > > To: Tai, Hideyuki <[email protected]>; Michal Rehak -X (mirehak - > > PANTHEON TECHNOLOGIES at Cisco) <[email protected]>; openflowplugin- > > dev <[email protected]> > > Cc: '[email protected]' <[email protected]> > > Subject: Re: [openflowplugin-dev] Request for the stats RPC in the > > OFP-Li > > > > Michal, > > > > Is it undesirable to have these rpc's enabled by default? > > > > Hideyuki, > > > > if it was enabled by default, does that solve your problem for now? > > > > JamO > > > > On 01/27/2016 09:21 AM, Tai, Hideyuki wrote: > > > Hi Michal, > > > > > > Thank you for your response! > > > > > > We know we can enable the RPC by changing the configuration file of > > > the > > ofplugin-li. > > > > > > However, it is difficult for VTN project to accept the migration to > > > the OFP-Li > > with this way. > > > In this way, to use VTN project's features, user need to manually > > > stop the > > controller, change the configuration file manually, and start the controller > again. > > > And, I don't think there is a way to enable the RPC in runtime. > > > > > > Therefore, we would like your team to provide the > > > "get-flow-statistics-from- > > flow-table" RPC by default in the OFP-Li. > > > Or we would like your team to provide applications (e.g. VTN > > > project's > > features) with a way to enable the RPC in runtime. > > > > > > Regards, > > > Hideyuki Tai > > > > > >> -----Original Message----- > > >> From: Michal Rehak -X (mirehak - PANTHEON TECHNOLOGIES at Cisco) > > >> [mailto:[email protected]] > > >> Sent: Wednesday, January 27, 2016 04:53 > > >> To: Tai, Hideyuki <[email protected]>; openflowplugin-dev > > >> <[email protected]> > > >> Cc: '[email protected]' > > >> <[email protected]> > > >> Subject: Re: Request for the stats RPC in the OFP-Li > > >> > > >> Hi Hideyuki, > > >> could you test with this parameter (is-statistics-rpc-enabled) > > >> added to ofplugin- li configuration, e.g.: > > >> > > >> > > >> > > >> <switch-features-mandatory>false</switch-features- > > mandatory> > > >> > > >> <global-notification-quota>64000</global-notification- > quota> > > >> > > >> <is-statistics-polling-off>false</is-statistics-polling-off> > > >> > > >> <is-statistics-rpc-enabled>true</is-statistics-rpc-enabled> > > >> </module> > > >> </modules> > > >> > > >> > > >> Regards, > > >> Michal > > >> > > >> ________________________________________ > > >> From: [email protected] > > >> <openflowplugin- [email protected]> on behalf of > > >> Tai, Hideyuki <[email protected]> > > >> Sent: Wednesday, January 27, 2016 01:23 > > >> To: openflowplugin-dev > > >> Cc: '[email protected]' > > >> Subject: [openflowplugin-dev] Request for the stats RPC in the > > >> OFP-Li > > >> > > >> Hi OpenFlow Plugin project, > > >> > > >> Here is a request from VTN project. > > >> > > >> Could you make the OpenFlow Plugin Lithium design provide the RPC > > >> for statistics? > > >> To be more precise, VTN project needs the > > >> "get-flow-statistics-from-flow- > > table" > > >> RPC modeled in "opendaylight-flow-statistics.yang". > > >> The RPC is available in the Helium design, but not available by > > >> default by Lithium design. > > >> > > >> In our understanding, RPCs for statistics are deprecated in the > > >> OpenFlow Plugin Lithium design, and the RPCs are not incorporated > > >> by > > default. > > >> There is no way to enable the RPCs for statistics in runtime. > > >> > > >> At this time, VTN project uses the OpenFlow Plugin Helium design in > > >> the stable/beryllium branch. > > >> Now, we would like to start the preparation for the migration to > > >> the Lithium design. > > >> To migrate to the Lithium design, we need the Lithium design > > >> provide either; > > >> - Provide the "get-flow-statistics-from-flow-table" RPC by default. > > >> or > > >> - Provide the VTN project with a way to enable the RPC in runtime. > > >> > > >> VTN project needs the "get-flow-statistics-from-flow-table" RPC to > > >> get information of all flow entries in OpenFlow switches. > > >> > > >> Best Regards, > > >> Hideyuki Tai > > >> _______________________________________________ > > >> openflowplugin-dev mailing list > > >> [email protected] > > >> https://lists.opendaylight.org/mailman/listinfo/openflowplugin-dev > > > _______________________________________________ > > > openflowplugin-dev mailing list > > > [email protected] > > > https://lists.opendaylight.org/mailman/listinfo/openflowplugin-dev > > > > _______________________________________________ > openflowplugin-dev mailing list > [email protected] > https://lists.opendaylight.org/mailman/listinfo/openflowplugin-dev _______________________________________________ openflowplugin-dev mailing list [email protected] https://lists.opendaylight.org/mailman/listinfo/openflowplugin-dev
