Thanks, Austin: It’s working for me. Share my steps: echo "Using helm-overrides to change the vni" cat > neutron-overrides.yaml <<EOF conf: plugins: ml2_conf: ml2_type_vxlan: vni_ranges: - 1:4000 EOF echo "Update the neutron overrides and apply to stx-openstack" source /etc/platform/openrc system helm-override-update stx-openstack neutron openstack --values neutron-overrides.yaml system application-apply stx-openstack watch -n 5 system application-list Regards, C.H. Huang From: Sun, Austin <austin.sun@intel.com> Sent: Tuesday, November 17, 2020 4:44 PM To: CH.Huang789 <ch.huang789@advantech.com.tw>; starlingx-discuss@lists.starlingx.io Subject: RE: [Starlingx-discuss] 回复：回复： 【StarlingX】Regarding external networking issue Hi Huang: It’s better to use helm override command to change neutron ml2 setting . Please refer to Networking setting [1] [1] https://wiki.openstack.org/wiki/StarlingX/Networking#Useful_Networking_Comma... Thanks. BR Austin Sun. From: CH.Huang789 <ch.huang789@advantech.com.tw<mailto:ch.huang789@advantech.com.tw>> Sent: Tuesday, November 17, 2020 4:37 PM To: starlingx-discuss@lists.starlingx.io<mailto:starlingx-discuss@lists.starlingx.io> Subject: Re: [Starlingx-discuss] 回复：回复： 【StarlingX】Regarding external networking issue Hi All: I try to edit the ml2_config.ini but it’s always show me a readonly file even I am the root user or I use “sudo”. controller-0:~$ source ./openrc.os [sysadmin@controller-0 ~(keystone_admin)]$ kubectl exec -it neutron-ovs-agent-controller-0-937646f6-k5q4x -n openstack -- bash [root@controller-0 /]# vi /etc/neutron/plugins/ml2/ml2_conf.ini [agent] extensions = [ml2] extension_drivers = port_security mechanism_drivers = openvswitch,sriovnicswitch,l2population path_mtu = 0 physical_network_mtus = phy-flat1:1500,physnet2:1500 tenant_network_types = vlan,vxlan type_drivers = flat,vlan,vxlan [ml2_type_flat] flat_networks = phy-flat1,physnet2 [ml2_type_vxlan] vni_ranges = vxlan_group = [ovs_driver] vhost_user_enabled = true [securitygroup] firewall_driver = openvswitch ~ "/etc/neutron/plugins/ml2/ml2_conf.ini" [readonly] 18L, 435C Can someone help me? Regards, C.H. Huang