/etc/network/interfaces.d/osa_interfaces.cfg
## The default networking requires several bridges. These bridges were named to be informative
## however they can be named what ever you like and is adaptable to any network infrastructure
## environment. This file serves as an example of how to setup basic networking and was ONLY
## built for the purpose of being an example and used expressly in the building of an ALL IN
## ONE development environment.

auto br-mgmt
iface br-mgmt inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    # Notice the bridge port is the vlan tagged interface
    bridge_ports none
    address 172.29.236.100
    netmask 255.255.252.0
    offload-sg off

auto br-vxlan
iface br-vxlan inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports none
    address 172.29.240.100
    netmask 255.255.252.0
    offload-sg off
    # To ensure ssh checksum is correct
    up /sbin/iptables -A POSTROUTING -t mangle -p tcp --dport 22 -j CHECKSUM --checksum-fill
    down /sbin/iptables -D POSTROUTING -t mangle -p tcp --dport 22 -j CHECKSUM --checksum-fill
    # To provide internet connectivity to instances
    up /sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
    down /sbin/iptables -t nat -D POSTROUTING -o eth0 -j MASQUERADE

auto br-storage
iface br-storage inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports none
    address 172.29.244.100
    netmask 255.255.252.0
    offload-sg off

auto br-vlan
iface br-vlan inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    address 172.29.248.100
    netmask 255.255.252.0
    offload-sg off
    # Create veth pair, don't bomb if already exists
    pre-up ip link add br-vlan-veth type veth peer name eth12 || true
    # Set both ends UP
    pre-up ip link set br-vlan-veth up
    pre-up ip link set eth12 up
    # Delete veth pair on DOWN
    post-down ip link del br-vlan-veth || true
    bridge_ports br-vlan-veth

# Add an additional address to br-vlan
iface br-vlan inet static
    # Flat network default gateway
    # -- This needs to exist somewhere for network reachability
    # -- from the router namespace for floating IP paths.
    # -- Putting this here is primarily for tempest to work.
    address 172.29.248.1
    netmask 255.255.252.0