Following bellow is set of directives allowing to switch Openstack RDO Mitaka to using flat (vlan) external network provider,what allows to work with several external networks via single L3 router. Conversion supposed to be done doesn't depend in any way of how tenants are segregated either VLAN tagged networks or VXLAN (GRE) tunneling.
Original answer-file
To switch to external network provider plug into Controller 2 NICs (eth2 and eth3) belong to external2 , external3 networks correspondently. Than proceed
with creating required OVS bridges and ports, followed by service network restart and updating l3_agent.ini, ml2_conf.ini, openvswitchagent.ini on Controller Node followed by `openstack-service restart neutron`
**********************************************************************************
Creating OVS bridges and OVS ports to support 2 external flat networks
(2,3) and VLAN tagged network to Compute Node (1)
*********************************************************************************
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth1
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth1
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth2
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth2
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth3
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth3
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth1
DEVICE=eth1
NAME=eth1
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth1
ONBOOT=yes
BOOTPROTO=none
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth2
DEVICE=eth2
NAME=eth2
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth2
ONBOOT=yes
BOOTPROTO=none
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth3
DEVICE=eth3
NAME=eth3
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth3
ONBOOT=yes
BOOTPROTO=none
Now run :-
# service network restart
****************************************************
Update Neutron OVS configuration files
****************************************************
Start with the following comment in
[DEFAULT]
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
agent_mode = legacy
external_network_bridge =
gateway_external_network_id =
debug = False
[AGENT]
[root@ServerCentOS01 ml2(keystone_admin)]# cat ml2_conf.ini
[DEFAULT]
[ml2]
type_drivers = vlan,flat
tenant_network_types = vlan
mechanism_drivers =openvswitch
path_mtu = 0
[ml2_type_flat]
flat_networks = *
[ml2_type_geneve]
[ml2_type_gre]
[ml2_type_vlan]
network_vlan_ranges =physnet1:100:200,physnet2,physnet3
[ml2_type_vxlan]
[securitygroup]
enable_security_group = True
[root@ServerCentOS01 ml2(keystone_admin)]# cat openvswitch_agent.ini
[DEFAULT]
[agent]
l2_population = False
drop_flows_on_start = False
[ovs]
integration_bridge = br-int
bridge_mappings =physnet1:br-eth1,physnet2:br-eth2,physnet3:br-eth3
enable_tunneling=False
[securitygroup]
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
****************************************************
Restart Neutron services on Controller
****************************************************
# openstack-service restart neutron
****************************************************
Verification OVS configuration on Controller
*****************************************************
[root@ServerCentOS01 ml2(keystone_admin)]# ovs-vsctl show
8115e0cb-0fa7-4239-a65a-2bd57a6fbbc7
Bridge "br-eth3" ===============> to external3
Port "eth3"
Interface "eth3"
Port "br-eth3"
Interface "br-eth3"
type: internal
Port "phy-br-eth3"
Interface "phy-br-eth3"
type: patch
options: {peer="int-br-eth3"}
Bridge "br-eth2" ===============> to external2
Port "eth2"
Interface "eth2"
Port "br-eth2"
Interface "br-eth2"
type: internal
Port "phy-br-eth2"
Interface "phy-br-eth2"
type: patch
options: {peer="int-br-eth2"}
Bridge "br-eth1" ===> VM/Data VLAN tagged to Compute
Port "br-eth1"
Interface "br-eth1"
type: internal
Port "phy-br-eth1"
Interface "phy-br-eth1"
type: patch
options: {peer="int-br-eth1"}
Port "eth1"
Interface "eth1"
Bridge br-ex
Port "eth0"
Interface "eth0"
Port br-ex
Interface br-ex
type: internal
Bridge br-int
fail_mode: secure
Port "qr-fa3ffad8-ad"
tag: 3
Interface "qr-fa3ffad8-ad"
type: internal
Port "qr-ae3b969f-40"
tag: 2
Interface "qr-ae3b969f-40"
type: internal
Port "qr-eb286124-0c"
tag: 1
Interface "qr-eb286124-0c"
type: internal
Port "qg-8f0df92f-de"
tag: 5
Interface "qg-8f0df92f-de"
type: internal
Port "tap931c3c44-5a"
tag: 3
Interface "tap931c3c44-5a"
type: internal
Port "int-br-eth2"
Interface "int-br-eth2"
type: patch
options: {peer="phy-br-eth2"} ====> veth pair
Port "tapd850dca6-58"
tag: 1
Interface "tapd850dca6-58"
type: internal
Port "int-br-eth3"
Interface "int-br-eth3"
type: patch
options: {peer="phy-br-eth3"} ====> veth pair
Port "tap2901cdcb-0b"
tag: 2
Interface "tap2901cdcb-0b"
type: internal
Port br-int
Interface br-int
type: internal
Port "qg-ae424f05-3b"
tag: 4
Interface "qg-ae424f05-3b"
type: internal
Port "int-br-eth1"
Interface "int-br-eth1"
type: patch
options: {peer="phy-br-eth1"} ===> veth pair
ovs_version: "2.4.0"
*****************************
Controller restart
*****************************
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-create external2 --router:external --provider:network_type=flat --provider:physical_network=physnet2
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2016-03-25T09:20:11 |
| description | |
| id | e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c |
| ipv4_address_scope | |
| ipv6_address_scope | |
| is_default | False |
| mtu | 1500 |
| name | external2 |
| provider:network_type | flat |
| provider:physical_network | physnet2 |
| provider:segmentation_id | |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | |
| tags | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:20:11 |
+---------------------------+--------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-create external3 --router:external --provider:network_type=flat --provider:physical_network=physnet3
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2016-03-25T09:20:35 |
| description | |
| id | db5b5700-6c8f-443d-ad38-2b330e37f44a |
| ipv4_address_scope | |
| ipv6_address_scope | |
| is_default | False |
| mtu | 1500 |
| name | external3 |
| provider:network_type | flat |
| provider:physical_network | physnet3 |
| provider:segmentation_id | |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | |
| tags | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:20:35 |
+---------------------------+--------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron subnet-create --disable-dhcp external2 10.3.0.0/24
Created a new subnet:
+-------------------+--------------------------------------------+
| Field | Value |
+-------------------+--------------------------------------------+
| allocation_pools | {"start": "10.3.0.2", "end": "10.3.0.254"} |
| cidr | 10.3.0.0/24 |
| created_at | 2016-03-25T09:21:15 |
| description | |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 10.3.0.1 |
| host_routes | |
| id | 4d653a31-435b-4516-bf1a-2ffb6689d803 |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | |
| network_id | e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c |
| subnetpool_id | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:21:15 |
+-------------------+--------------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron subnet-create --disable-dhcp external3 10.4.0.0/24
Created a new subnet:
+-------------------+--------------------------------------------+
| Field | Value |
+-------------------+--------------------------------------------+
| allocation_pools | {"start": "10.4.0.2", "end": "10.4.0.254"} |
| cidr | 10.4.0.0/24 |
| created_at | 2016-03-25T09:22:05 |
| description | |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 10.4.0.1 |
| host_routes | |
| id | d2b331b4-4b07-4a47-8fa5-a18e4252c3c9 |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | |
| network_id | db5b5700-6c8f-443d-ad38-2b330e37f44a |
| subnetpool_id | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:22:05 |
+-------------------+--------------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-list | grep external
| e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c | external2 | 4d653a31-435b-4516-bf1a-2ffb6689d803 10.3.0.0/24 |
| db5b5700-6c8f-443d-ad38-2b330e37f44a | external3 | d2b331b4-4b07-4a47-8fa5-a18e4252c3c9 10.4.0.0/24 |
[root@ServerCentOS01 ~(keystone_admin)]# neutron router-list
+----------------------------+--------------+-----------------------------+-------------+-------+
| id | name | external_gateway_info | distributed | ha |
+----------------------------+--------------+-----------------------------+-------------+-------+
| 1ccaf7b9-6a4a-433c-b86a- | RouterDSA | null | False | False |
| ef8f999605a8 | | | | |
| 5de5dfb1-f765-4ba4-894b- | RouterMitaka | {"network_id": | False | False |
| 39feab39d347 | | "e1ff73a0-bec8-4e6b-82fe- | | |
| | | b7cd0e7b914c", | | |
| | | "enable_snat": true, | | |
| | | "external_fixed_ips": | | |
| | | [{"subnet_id": | | |
| | | "4d653a31-435b-4516-bf1a- | | |
| | | 2ffb6689d803", | | |
| | | "ip_address": "10.3.0.2"}]} | | |
| db06c4bf-cdcc-49ae- | RouterDVS | {"network_id": "db5b5700 | False | False |
| a7b0-634038b062cc | | -6c8f-443d- | | |
| | | ad38-2b330e37f44a", | | |
| | | "enable_snat": true, | | |
| | | "external_fixed_ips": | | |
| | | [{"subnet_id": "d2b331b4-4b | | |
| | | 07-4a47-8fa5-a18e4252c3c9", | | |
| | | "ip_address": "10.4.0.2"}]} | | |
+----------------------------+--------------+-----------------------------+-------------+-------+
When non-bridged external networking comes into play neutron-openvswitch-agent, running on Controller/Network Node, places external interfaces of corresponding neutron routers into corresponding OVS bridges,
in particular case br-eth2,br-eth3.
Run `ovs-ofctl dump-flows br-eth3` on Controller
Run `iftop -i eth3` on Controller
Original answer-file
To switch to external network provider plug into Controller 2 NICs (eth2 and eth3) belong to external2 , external3 networks correspondently. Than proceed
with creating required OVS bridges and ports, followed by service network restart and updating l3_agent.ini, ml2_conf.ini, openvswitchagent.ini on Controller Node followed by `openstack-service restart neutron`
**********************************************************************************
Creating OVS bridges and OVS ports to support 2 external flat networks
(2,3) and VLAN tagged network to Compute Node (1)
*********************************************************************************
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth1
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth1
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth2
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth2
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-br-eth3
ONBOOT=yes
NM_CONTROLLED=no
DEVICE=br-eth3
DEVICETYPE=ovs
OVSBOOTPROTO=none
TYPE=OVSBridge
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth1
DEVICE=eth1
NAME=eth1
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth1
ONBOOT=yes
BOOTPROTO=none
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth2
DEVICE=eth2
NAME=eth2
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth2
ONBOOT=yes
BOOTPROTO=none
[root@ServerCentOS01 network-scripts(keystone_admin)]# cat ifcfg-eth3
DEVICE=eth3
NAME=eth3
DEVICETYPE=ovs
TYPE=OVSPort
OVS_BRIDGE=br-eth3
ONBOOT=yes
BOOTPROTO=none
Now run :-
# service network restart
****************************************************
Update Neutron OVS configuration files
****************************************************
Start with the following comment in
l3_agent.ini:# When external_network_bridge is set, each L3 agent can be associated
# with no more than one external network. This value should be set to the UUID
# of that external network. To allow L3 agent support multiple external
# networks, both the external_network_bridge and gateway_external_network_id
# must be left empty.
[DEFAULT]
interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
agent_mode = legacy
external_network_bridge =
gateway_external_network_id =
debug = False
[AGENT]
[root@ServerCentOS01 ml2(keystone_admin)]# cat ml2_conf.ini
[DEFAULT]
[ml2]
type_drivers = vlan,flat
tenant_network_types = vlan
mechanism_drivers =openvswitch
path_mtu = 0
[ml2_type_flat]
flat_networks = *
[ml2_type_geneve]
[ml2_type_gre]
[ml2_type_vlan]
network_vlan_ranges =physnet1:100:200,physnet2,physnet3
[ml2_type_vxlan]
[securitygroup]
enable_security_group = True
[root@ServerCentOS01 ml2(keystone_admin)]# cat openvswitch_agent.ini
[DEFAULT]
[agent]
l2_population = False
drop_flows_on_start = False
[ovs]
integration_bridge = br-int
bridge_mappings =physnet1:br-eth1,physnet2:br-eth2,physnet3:br-eth3
enable_tunneling=False
[securitygroup]
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
****************************************************
Restart Neutron services on Controller
****************************************************
# openstack-service restart neutron
****************************************************
Verification OVS configuration on Controller
*****************************************************
[root@ServerCentOS01 ml2(keystone_admin)]# ovs-vsctl show
8115e0cb-0fa7-4239-a65a-2bd57a6fbbc7
Bridge "br-eth3" ===============> to external3
Port "eth3"
Interface "eth3"
Port "br-eth3"
Interface "br-eth3"
type: internal
Port "phy-br-eth3"
Interface "phy-br-eth3"
type: patch
options: {peer="int-br-eth3"}
Bridge "br-eth2" ===============> to external2
Port "eth2"
Interface "eth2"
Port "br-eth2"
Interface "br-eth2"
type: internal
Port "phy-br-eth2"
Interface "phy-br-eth2"
type: patch
options: {peer="int-br-eth2"}
Bridge "br-eth1" ===> VM/Data VLAN tagged to Compute
Port "br-eth1"
Interface "br-eth1"
type: internal
Port "phy-br-eth1"
Interface "phy-br-eth1"
type: patch
options: {peer="int-br-eth1"}
Port "eth1"
Interface "eth1"
Bridge br-ex
Port "eth0"
Interface "eth0"
Port br-ex
Interface br-ex
type: internal
Bridge br-int
fail_mode: secure
Port "qr-fa3ffad8-ad"
tag: 3
Interface "qr-fa3ffad8-ad"
type: internal
Port "qr-ae3b969f-40"
tag: 2
Interface "qr-ae3b969f-40"
type: internal
Port "qr-eb286124-0c"
tag: 1
Interface "qr-eb286124-0c"
type: internal
Port "qg-8f0df92f-de"
tag: 5
Interface "qg-8f0df92f-de"
type: internal
Port "tap931c3c44-5a"
tag: 3
Interface "tap931c3c44-5a"
type: internal
Port "int-br-eth2"
Interface "int-br-eth2"
type: patch
options: {peer="phy-br-eth2"} ====> veth pair
Port "tapd850dca6-58"
tag: 1
Interface "tapd850dca6-58"
type: internal
Port "int-br-eth3"
Interface "int-br-eth3"
type: patch
options: {peer="phy-br-eth3"} ====> veth pair
Port "tap2901cdcb-0b"
tag: 2
Interface "tap2901cdcb-0b"
type: internal
Port br-int
Interface br-int
type: internal
Port "qg-ae424f05-3b"
tag: 4
Interface "qg-ae424f05-3b"
type: internal
Port "int-br-eth1"
Interface "int-br-eth1"
type: patch
options: {peer="phy-br-eth1"} ===> veth pair
ovs_version: "2.4.0"
Controller restart
*****************************
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-create external2 --router:external --provider:network_type=flat --provider:physical_network=physnet2
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2016-03-25T09:20:11 |
| description | |
| id | e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c |
| ipv4_address_scope | |
| ipv6_address_scope | |
| is_default | False |
| mtu | 1500 |
| name | external2 |
| provider:network_type | flat |
| provider:physical_network | physnet2 |
| provider:segmentation_id | |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | |
| tags | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:20:11 |
+---------------------------+--------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-create external3 --router:external --provider:network_type=flat --provider:physical_network=physnet3
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2016-03-25T09:20:35 |
| description | |
| id | db5b5700-6c8f-443d-ad38-2b330e37f44a |
| ipv4_address_scope | |
| ipv6_address_scope | |
| is_default | False |
| mtu | 1500 |
| name | external3 |
| provider:network_type | flat |
| provider:physical_network | physnet3 |
| provider:segmentation_id | |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | |
| tags | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:20:35 |
+---------------------------+--------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron subnet-create --disable-dhcp external2 10.3.0.0/24
Created a new subnet:
+-------------------+--------------------------------------------+
| Field | Value |
+-------------------+--------------------------------------------+
| allocation_pools | {"start": "10.3.0.2", "end": "10.3.0.254"} |
| cidr | 10.3.0.0/24 |
| created_at | 2016-03-25T09:21:15 |
| description | |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 10.3.0.1 |
| host_routes | |
| id | 4d653a31-435b-4516-bf1a-2ffb6689d803 |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | |
| network_id | e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c |
| subnetpool_id | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:21:15 |
+-------------------+--------------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron subnet-create --disable-dhcp external3 10.4.0.0/24
Created a new subnet:
+-------------------+--------------------------------------------+
| Field | Value |
+-------------------+--------------------------------------------+
| allocation_pools | {"start": "10.4.0.2", "end": "10.4.0.254"} |
| cidr | 10.4.0.0/24 |
| created_at | 2016-03-25T09:22:05 |
| description | |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 10.4.0.1 |
| host_routes | |
| id | d2b331b4-4b07-4a47-8fa5-a18e4252c3c9 |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | |
| network_id | db5b5700-6c8f-443d-ad38-2b330e37f44a |
| subnetpool_id | |
| tenant_id | 9a43b79d7ba946d183e87807a6607570 |
| updated_at | 2016-03-25T09:22:05 |
+-------------------+--------------------------------------------+
[root@ServerCentOS01 ~(keystone_admin)]# neutron net-list | grep external
| e1ff73a0-bec8-4e6b-82fe-b7cd0e7b914c | external2 | 4d653a31-435b-4516-bf1a-2ffb6689d803 10.3.0.0/24 |
| db5b5700-6c8f-443d-ad38-2b330e37f44a | external3 | d2b331b4-4b07-4a47-8fa5-a18e4252c3c9 10.4.0.0/24 |
[root@ServerCentOS01 ~(keystone_admin)]# neutron router-list
+----------------------------+--------------+-----------------------------+-------------+-------+
| id | name | external_gateway_info | distributed | ha |
+----------------------------+--------------+-----------------------------+-------------+-------+
| 1ccaf7b9-6a4a-433c-b86a- | RouterDSA | null | False | False |
| ef8f999605a8 | | | | |
| 5de5dfb1-f765-4ba4-894b- | RouterMitaka | {"network_id": | False | False |
| 39feab39d347 | | "e1ff73a0-bec8-4e6b-82fe- | | |
| | | b7cd0e7b914c", | | |
| | | "enable_snat": true, | | |
| | | "external_fixed_ips": | | |
| | | [{"subnet_id": | | |
| | | "4d653a31-435b-4516-bf1a- | | |
| | | 2ffb6689d803", | | |
| | | "ip_address": "10.3.0.2"}]} | | |
| db06c4bf-cdcc-49ae- | RouterDVS | {"network_id": "db5b5700 | False | False |
| a7b0-634038b062cc | | -6c8f-443d- | | |
| | | ad38-2b330e37f44a", | | |
| | | "enable_snat": true, | | |
| | | "external_fixed_ips": | | |
| | | [{"subnet_id": "d2b331b4-4b | | |
| | | 07-4a47-8fa5-a18e4252c3c9", | | |
| | | "ip_address": "10.4.0.2"}]} | | |
+----------------------------+--------------+-----------------------------+-------------+-------+
When non-bridged external networking comes into play neutron-openvswitch-agent, running on Controller/Network Node, places external interfaces of corresponding neutron routers into corresponding OVS bridges,
in particular case br-eth2,br-eth3.
Run `ovs-ofctl dump-flows br-eth3` on Controller
Run `iftop -i eth3` on Controller
