OpenStack Epoxy : Configure Neutron Network

Configure Networking for Virtual Machine Instances. Configure basic settings first for Neutron Services like All in One Settings like here. For example, configure FLAT type of networking on here. The Node has 2 network interfaces like follows. eth0|10.0.0.30 +-----------+-----------+ | [ dlp.srv.world ] | | (Control Node) | | | | MariaDB RabbitMQ | | Memcached Nginx | | Keystone httpd | | Glance Nova API | | Nova Compute | | Neutron Server | | Open vSwitch | | OVN Metadata Agent | | OVN-Controller | +-----------+-----------+ eth1|(UP with no IP)

[1]	Configure Neutron services.

# create a setting file for anonymous interface # replace the name [eth1] to your environment root@dlp ~(keystone)#  vi /etc/network/interfaces auto eth1 iface eth1 inet manual root@dlp ~(keystone)#  ip link set eth1 up # add bridge (any name you like for [br-eth1]) root@dlp ~(keystone)#  ovs-vsctl add-br br-eth1 # add a port to the bridge # replace [eth1] to your own environment root@dlp ~(keystone)#  ovs-vsctl add-port br-eth1 eth1 # map [physnet1] to the bridge (any name you like for [physnet1]) root@dlp ~(keystone)#  ovs-vsctl set open . external-ids:ovn-bridge-mappings=physnet1:br-eth1

[2]	Create virtual network.

root@dlp ~(keystone)#  projectID=$(openstack project list | grep service | awk '{print $2}') # create network named [sharednet1] root@dlp ~(keystone)#  openstack network create --project $projectID \ --share --provider-network-type flat --provider-physical-network physnet1 sharednet1 +---------------------------+--------------------------------------+ | Field | Value | +---------------------------+--------------------------------------+ | admin_state_up | UP | | availability_zone_hints | | | availability_zones | | | created_at | 2025-08-27T06:02:37Z | | description | | | dns_domain | None | | id | c4512c41-5546-4278-ba53-31ba2f1526d0 | | ipv4_address_scope | None | | ipv6_address_scope | None | | is_default | None | | is_vlan_qinq | None | | is_vlan_transparent | None | | mtu | 1500 | | name | sharednet1 | | port_security_enabled | True | | project_id | a60814a6c56241edbbdfae6c290f8abc | | provider:network_type | flat | | provider:physical_network | physnet1 | | provider:segmentation_id | None | | qos_policy_id | None | | revision_number | 1 | | router:external | Internal | | segments | None | | shared | True | | status | ACTIVE | | subnets | | | tags | | | updated_at | 2025-08-27T06:02:37Z | +---------------------------+--------------------------------------+ # create subnet [10.0.0.0/24] in [sharednet1] root@dlp ~(keystone)#  openstack subnet create subnet1 --network sharednet1 \ --project $projectID --subnet-range 10.0.0.0/24 \ --allocation-pool start=10.0.0.200,end=10.0.0.254 \ --gateway 10.0.0.1 --dns-nameserver 10.0.0.10 +----------------------+--------------------------------------+ | Field | Value | +----------------------+--------------------------------------+ | allocation_pools | 10.0.0.200-10.0.0.254 | | cidr | 10.0.0.0/24 | | created_at | 2025-08-27T06:03:02Z | | description | | | dns_nameservers | 10.0.0.10 | | dns_publish_fixed_ip | None | | enable_dhcp | True | | gateway_ip | 10.0.0.1 | | host_routes | | | id | b5a506f1-9e50-41d8-b552-1edb595da813 | | ip_version | 4 | | ipv6_address_mode | None | | ipv6_ra_mode | None | | name | subnet1 | | network_id | c4512c41-5546-4278-ba53-31ba2f1526d0 | | project_id | a60814a6c56241edbbdfae6c290f8abc | | revision_number | 0 | | router:external | False | | segment_id | None | | service_types | | | subnetpool_id | None | | tags | | | updated_at | 2025-08-27T06:03:02Z | +----------------------+--------------------------------------+ # confirm settings root@dlp ~(keystone)#  openstack network list +--------------------------------------+------------+--------------------------------------+ | ID | Name | Subnets | +--------------------------------------+------------+--------------------------------------+ | c4512c41-5546-4278-ba53-31ba2f1526d0 | sharednet1 | b5a506f1-9e50-41d8-b552-1edb595da813 | +--------------------------------------+------------+--------------------------------------+ root@dlp ~(keystone)#  openstack subnet list +--------------------------------------+---------+--------------------------------------+-------------+ | ID | Name | Network | Subnet | +--------------------------------------+---------+--------------------------------------+-------------+ | b5a506f1-9e50-41d8-b552-1edb595da813 | subnet1 | c4512c41-5546-4278-ba53-31ba2f1526d0 | 10.0.0.0/24 | +--------------------------------------+---------+--------------------------------------+-------------+

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