# First you need to create the external bridge interface
osvs-vsctl add-br br-ext

# Then you'll want to edit /etc/network/interfaces and change your external interface in there to be br-ext.  The
bridge interface needs to have the IP address associated with it.  Once you associate the ethernet interface with the bridge it will no longer work.

# Associate the external interface with the bridge

ovs-vsctl br-set-external-id br-ex bridge-id br-ext
ovs-vsctl add-port br-ext eth0

# Create the subnet for floating IPs

## Get your tenant-id

keystone tenant list

## Create subnet for floating ips

quantum net-create --tenant-id $put_id_of_service_tenant ext_net --router:external=True
quantum subnet-create --tenant-id $put_id_of_service_tenant --allocation-pool start=$floating_range_start,end=$floating_range_end --gateway $external_Gateway ext_net $external_address_range/cidr --enable_dhcp=False

## Example: quantub subnet-create -tenant-id [tenant-id] --allocation-pool start=192.16.1.100,end=192.168.1.200 --gateway 192.168.1.1 ext_net 192.168.1.0/24 --enable_dhcp=False



## Edit /etc/quantum/l3_agent.ini and set this variable

external_network_bridge = br-ext

## Restart l3-agent

service quantum-l3-agent restart

## Associate external network with your existing router

quantum router-gateway-set $put_router_proj_one_id_here $put_id_of_ext_net_here

## You should now be able to associate floating IP addresses with your instances