system:Centos7

tunnel_type:vxlan

Create router select centralized mode,associate floating ip no problem.

Create router select distributed mode, associate floating ip reported "No ports available".

my configuration:

control+network node:

[root@control neutron]# grep "^[a-zA-Z[]" neutron.conf

[DEFAULT] 

verbose = True 

rpc_backend = rabbit 

rabbit_host = 192.168.221.1 

rabbit_password = 123456 

auth_strategy = keystone 

core_plugin = ml2 

service_plugins = router 

allow_overlapping_ips = True 

notify_nova_on_port_status_changes = True 

notify_nova_on_port_data_changes = True 

nova_url = http://192.168.221.1:8774/v2 

nova_admin_auth_url = http://192.168.221.1:35357/v2.0 

nova_region_name = regionOne 

nova_admin_username = nova 

nova_admin_tenant_id = f0c8aaa916c543e7b1013e4c745dd1f2 

nova_admin_password = 123456 

router_distributed = True 

[matchmaker_redis] 

[matchmaker_ring] 

[quotas] 

[agent] 

[keystone_authtoken] 

auth_uri = http://192.168.221.1:5000/v2.0 

identity_uri = http://192.168.221.1:35357 

admin_tenant_name = service 

admin_user = neutron 

admin_password = 123456 

[database] 

connection = mysql://neutron:123456@192.168.221.1/neutron 

[service_providers] 

service_provider=LOADBALANCER:Haproxy:neutron.services.loadbalancer.drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver:default

service_provider=VPN:openswan:neutron.services.vpn.service_drivers.ipsec.IPsecVPNDriver:default 

[root@control neutron]# 

[root@control neutron]#

[root@control neutron]# grep "^[a-zA-Z[]" l3_agent.ini

[DEFAULT] 

verbose = True 

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver 

use_namespaces = True 

external_network_bridge = br-ex 

agent_mode = dvr_snat

[root@control neutron]#

[root@control neutron]#

[root@control neutron]# grep "^[a-zA-Z[]" plugin.ini

[ml2] 

type_drivers = flat,vxlan 

tenant_network_types = vxlan 

mechanism_drivers = openvswitch,l2population 

[ml2_type_flat] 

flat_networks = external 

[ml2_type_vlan] 

[ml2_type_gre] 

[ml2_type_vxlan] 

vni_ranges = 1:5000 

[securitygroup] 

enable_security_group = True 

enable_ipset = True 

firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver 

[ovs] 

tenant_network_type = vxlan 

tunnel_type = vxlan 

tunnel_id_ranges = 1:5000 

integration_bridge = br-int 

tunnel_bridge = br-tun 

bridge_mapping = external:br-ex 

local_ip = 192.168.221.1 

[agent] 

tunnel_types = vxlan 

l2_population = True 

enable_distributed_routing = True

compute node :

[root@compute01 neutron]# grep "^[a-zA-Z[]" neutron.conf

[DEFAULT] 
verbose = True 

rpc_backend = rabbit 

rabbit_host = 192.168.221.1 

rabbit_password = 123456 

auth_strategy = keystone 

core_plugin = ml2 

service_plugins = router 

allow_overlapping_ips = True 

router_distributed = True 

[matchmaker_redis] 

[matchmaker_ring] 

[quotas] 

[agent] 

[keystone_authtoken] 

auth_uri = http://192.168.221.1:5000/v2.0 

identity_uri = http://192.168.221.1:35357 

admin_tenant_name = service 

admin_user = neutron 

admin_password = 123456 

[database] 

[service_providers] 

service_provider=LOADBALANCER:Haproxy:neutron.services.loadbalancer.drivers.haproxy.plugin_driver.HaproxyOnHostPluginDriver:default

service_provider=VPN:openswan:neutron.services.vpn.service_drivers.ipsec.IPsecVPNDriver:default

[root@compute01 neutron]#

[root@compute01 neutron]#

[root@compute01 neutron]# grep "^[a-zA-Z[]" l3_agent.ini

[DEFAULT] 

verbose = True 

interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver 

use_namespaces = True 

external_network_bridge = br-ex 

agent_mode = dvr

[root@compute01 neutron]#

[root@compute01 neutron]#

[root@compute01 neutron]# grep "^[a-zA-Z[]" plugin.ini

[ml2] 

type_drivers = flat,vxlan 

tenant_network_types = vxlan 

mechanism_drivers = openvswitch,l2population 

[ml2_type_flat] 

flat_networks = external 

[ml2_type_vlan] 

[ml2_type_gre] 

[ml2_type_vxlan] 

vni_ranges = 1:5000 

[securitygroup] 

enable_security_group = True 

enable_ipset = True 

firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver 

[ovs] 
tenant_network_type = vxlan 

tunnel_type = vxlan 

tunnel_id_ranges = 1:5000 

integration_bridge = br-int 

tunnel_bridge = br-tun 

bridge_mapping = external:br-ex 

local_ip = 192.168.221.2 

[agent] 

tunnel_types = vxlan 

l2_population = True 

enable_distributed_routing = True

thanks!