OVN is virtual networking implementation. With OpenStack Neutron, follow the doc, VM will directly connect to NIC VF. I don't see OVN integration is needed.
It's another story if you want connectivity between OVN-based VM and SRIOV-based VM. Tony ________________________________________ From: Brendan Doyle <brendan.do...@oracle.com> Sent: February 15, 2022 08:53 AM To: Tony Liu; Satish Patel Cc: ovs-discuss Subject: Re: [ovs-discuss] [External] : Re: SR-IOV OVN OpenStack Mellanox Yes but how is that integrated into OVN? On 15/02/2022 16:41, Tony Liu wrote: > SRIOV connects VM directly to NIC VF and bypasses virtual networking stack. > SmartNIC is another story where virtual networking stack can be installed on > the NIC. > SRIOV is supported by Neutron. > https://urldefense.com/v3/__https://docs.openstack.org/neutron/xena/admin/config-sriov.html__;!!ACWV5N9M2RV99hQ!eHoUiPE3yK4G7wru3NHOe4xZEY8JZCTBMzsMhhoNnkr7oZQDSf-4QrFyS4Y5t7g5lTU$ > > Tony > ________________________________________ > From: discuss <ovs-discuss-boun...@openvswitch.org> on behalf of Brendan > Doyle <brendan.do...@oracle.com> > Sent: February 15, 2022 07:10 AM > To: Satish Patel > Cc: ovs-discuss > Subject: Re: [ovs-discuss] [External] : Re: SR-IOV OVN OpenStack Mellanox > > Kinda looking for at a high level yes it is possible and is integrated into > ovn control plane, or not not there yet. At a high level first. > And is anyone doing this. > > > On 15/02/2022 14:03, Satish Patel wrote: >> Not sure if this is what you are looking for >> https://urldefense.com/v3/__https://docs.nvidia.com/networking/display/TAN10/ASAP*OVS*Offload__;Kys!!ACWV5N9M2RV99hQ!dFnukkvR8ggDcHotwyqXNVu8B3dWlc7LBGXbc5fECYqHdok6NIeoKkz5aSlp-RCKC10$ >> >> On Tue, Feb 15, 2022 at 5:47 AM Brendan Doyle <brendan.do...@oracle.com> >> wrote: >>> Hi, >>> >>> I'm trying to understand if OVN supports SR-IOV. I found some OpentStack >>> documentation: >>> https://urldefense.com/v3/__https://docs.openstack.org/project-deploy-guide/charm-deployment-guide/wallaby/app-ovn.html*configuration__;Iw!!ACWV5N9M2RV99hQ!dFnukkvR8ggDcHotwyqXNVu8B3dWlc7LBGXbc5fECYqHdok6NIeoKkz5aSlpwu75q1Q$ >>> that suggests it might, but it is short on details, with specifics >>> abstracted via the OpenStack CMS. >>> >>> Also in the OVN Architecture documentation there are hints to support: >>> >>> "For instances connected through representor ports, typically used >>> with hardware >>> offload, the ovn-controller may on CMS direction consult a VIF >>> plug provider for >>> representor port lookup and plug them into the integration bridge >>> (please refer to >>> Docu mentation/topics/vif-plug-providers/vif-plug-providers.rst for >>> more information)." >>> >>> But again short on details. >>> >>> So I believe something like a CX-5/6/7 would have the capability to do >>> this, but here would have to be some >>> sort of OVN hook for the OVS flows created by OVN to be "copied/moved" >>> to the H/W so that encapsulation, >>> NAT, distributed routing ACLs etc is done in the hardware. I can't find >>> any details on this nor what would the >>> control plane for programing the hardware be to do that, ovn-nbctl?, >>> ovsdbapp? some other out of band control plane?. >>> Also from what I gather from the OpenStack docs this seems experimental >>> and limited to VXLAN encapsulation? >>> >>> At present I use a libvirt OVN hook that hooks KVM/QEMU VMs into OVN >>> br-int but these are using >>> software VIFs. I'm trying to ascertain if can have these VM use SR-IOV, >>> and still have them integrated >>> into the OVN logical networks. >>> >>> >>> Any pointers would welcome. >>> >>> Thanks >>> >>> >>> Brendan >>> >>> _______________________________________________ >>> discuss mailing list >>> disc...@openvswitch.org >>> https://urldefense.com/v3/__https://mail.openvswitch.org/mailman/listinfo/ovs-discuss__;!!ACWV5N9M2RV99hQ!dFnukkvR8ggDcHotwyqXNVu8B3dWlc7LBGXbc5fECYqHdok6NIeoKkz5aSlpNIZip9k$ > _______________________________________________ > discuss mailing list > disc...@openvswitch.org > https://urldefense.com/v3/__https://mail.openvswitch.org/mailman/listinfo/ovs-discuss__;!!ACWV5N9M2RV99hQ!eHoUiPE3yK4G7wru3NHOe4xZEY8JZCTBMzsMhhoNnkr7oZQDSf-4QrFyS4Y5EkKIAjo$ _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
