I got a snapshot of a dev config from fyb3r that confirmed that a lot of the documentation out there for havana contained un-necessary extra work in /etc/network/interfaces, etc. when using ovs and 3 interfaces. Here are the pastes (s)he provided:
/etc/network/interfaces to go with the below:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 10.1.10.155
netmask 255.255.255.0
gateway 10.1.10.99
broadcast 10.1.10.255
dns-nameservers 10.1.10.10 8.8.8.8
auto eth1
iface eth1 inet static
address 10.1.11.155
netmask 255.255.255.0
network 10.1.11.0
# The external network interface
auto eth2
iface eth2 inet manual
up ip link set dev $IFACE up
down ip link set dev $IFACE down
output of ovs-vsctl show, displaying which interfaces are in use, and how
69b4faef-c40d-4874-bbb3-953b91dad0ab
Bridge br-ex
Port br-ex
Interface br-ex
type: internal
Port "eth2"
Interface "eth2"
Bridge br-int
fail_mode: secure
Port br-int
Interface br-int
type: internal
Port patch-tun
Interface patch-tun
type: patch
options: {peer=patch-int}
Bridge br-tun
Port patch-int
Interface patch-int
type: patch
options: {peer=patch-tun}
Port br-tun
Interface br-tun
type: internal
ovs_version: "2.0.2"
showing ml2_conf.ini, showing the IP address for eth1 in use for ovs
[ml2]
# (ListOpt) List of network type driver entrypoints to be loaded from
# the neutron.ml2.type_drivers namespace.
#
type_drivers = gre,local,flat,vlan,vxlan
# Example: type_drivers = flat,vlan,gre,vxlan
# (ListOpt) Ordered list of network_types to allocate as tenant
# networks. The default value 'local' is useful for single-box testing
# but provides no connectivity between hosts.
#
tenant_network_types = gre
# Example: tenant_network_types = vlan,gre,vxlan
# (ListOpt) Ordered list of networking mechanism driver entrypoints
# to be loaded from the neutron.ml2.mechanism_drivers namespace.
mechanism_drivers = openvswitch,l2population,linuxbridge
# Example: mechanism drivers = openvswitch,mlnx
# Example: mechanism_drivers = arista
# Example: mechanism_drivers = cisco,logger
# Example: mechanism_drivers = openvswitch,brocade
# Example: mechanism_drivers = linuxbridge,brocade
[ml2_type_flat]
# (ListOpt) List of physical_network names with which flat networks
# can be created. Use * to allow flat networks with arbitrary
# physical_network names.
#
# flat_networks =
# Example:flat_networks = physnet1,physnet2
# Example:flat_networks = *
[ml2_type_vlan]
# (ListOpt) List of <physical_network>[:<vlan_min>:<vlan_max>] tuples
# specifying physical_network names usable for VLAN provider and
# tenant networks, as well as ranges of VLAN tags on each
# physical_network available for allocation as tenant networks.
#
# network_vlan_ranges =
# Example: network_vlan_ranges = physnet1:1000:2999,physnet2
[ml2_type_gre]
# (ListOpt) Comma-separated list of <tun_min>:<tun_max> tuples enumerating ranges of GRE tunnel IDs that are available for tenant network allocation
tunnel_id_ranges = 1:1000
[ovs]
local_ip = 10.1.11.155
tunnel_type = gre
enable_tunneling = True
[agent]
tunnel_types = gre,vxlan
l2_population = True
[ml2_type_vxlan]
# (ListOpt) Comma-separated list of <vni_min>:<vni_max> tuples enumerating
# ranges of VXLAN VNI IDs that are available for tenant network allocation.
#
# vni_ranges =
# (StrOpt) Multicast group for the VXLAN interface. When configured, will
# enable sending all broadcast traffic to this multicast group. When left
# unconfigured, will disable multicast VXLAN mode.
#
# vxlan_group =
# Example: vxlan_group = 239.1.1.1
[securitygroup]
# Controls if neutron security group is enabled or not.
# It should be false when you use nova security group.
firewall_driver = neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
enable_security_group = True
