What is your testing methodology? Is it iPerf? Trex? Something you can share so we might recreate and compare on our side? -- James Denton Principal Architect Rackspace Private Cloud - OpenStack james.denton@rackspace.com From: Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com> Date: Monday, April 28, 2025 at 7:28 AM To: OpenStack Discuss <openstack-discuss@lists.openstack.org> Subject: Re: [neutron][ovn] both vxlan and geneve cannot get full bandwidth CAUTION: This message originated externally, please use caution when clicking on links or opening attachments! Hello. Could I have some ideas on it please? Nguyen Huu Khoi On Thu, Apr 17, 2025 at 9:53 PM Nguyễn Hữu Khôi <nguyenhuukhoinw@gmail.com<mailto:nguyenhuukhoinw@gmail.com>> wrote: Hello. I am going with ovn for my system but when I use vxlan and geneve, my instance cannot get full bandwidth(12 gbps)-instance to instance with private network. It is ok if I use vlan or floating ip for instances. My env: Openstack 2025.1 Kolla Ansible master-2025.1 Ubuntu 22.04 with uplink 25gbps x 2 for bonding, lacp 802.3ad, layer3+4 Ps give me some points. Thank Nguyen Huu Khoi