Example OSA interface used with a single nic and a desire to create a production like setup.

example-osa-interface.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 of an environment with a single interface interface
## with the desire to create a bridge configuration that resembles production.


# Physical interface
# ------------------
# All nodes will have some physical interface
auto eth0
iface eth0 inet manual


# Bridge for integration network
# ------------------------------
# Used by all other bridges
# The IP address on this device is Required
auto br-int
iface br-int inet static
    ### vxlan veth
    pre-up ip link add vlan-veth1 type veth peer name vlan-veth2 || true  # Create veth pair
    pre-up ip link set vlan-veth1 up  # Set the veth UP
    pre-up ip link set vlan-veth2 up  # Set the veth UP
    post-down ip link del vlan-veth1 || true  # Delete veth pair on DOWN
    ### vxlan veth
    ### vxlan veth
    pre-up ip link add vxlan-veth1 type veth peer name vxlan-veth2 || true  # Create veth pair
    pre-up ip link set vxlan-veth1 up  # Set the veth UP
    pre-up ip link set vxlan-veth2 up  # Set the veth UP
    post-down ip link del vxlan-veth1 || true  # Delete veth pair on DOWN
    ### vxlan veth
    ### Management veth
    pre-up ip link add mgmt-veth1 type veth peer name mgmt-veth2 || true  # Create veth pair
    pre-up ip link set mgmt-veth1 up  # Set the veth UP
    pre-up ip link set mgmt-veth2 up  # Set the veth UP
    post-down ip link del mgmt-veth1 || true  # Delete veth pair on DOWN
    ### Management veth
    ### storage veth
    pre-up ip link add storage-veth1 type veth peer name storage-veth2 || true  # Create veth pair
    pre-up ip link set storage-veth1 up  # Set the veth UP
    pre-up ip link set storage-veth2 up  # Set the veth UP
    post-down ip link del storage-veth1 || true  # Delete veth pair on DOWN
    ### storage veth
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports eth0 vlan-veth1 vxlan-veth1 mgmt-veth1 storage-veth1
    offload-sg off
    address 10.0.0.100
    netmask 255.255.255.0
    gateway 10.0.0.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for vlan network
# -----------------------
# Used by all compute and network nodes
# The IP address on this device is optional
#  If no IP address is set change "static" to "manual"
auto br-vlan
iface br-vlan inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports vlan-veth2
    offload-sg off
    address 172.29.236.100
    netmask 255.255.252.0
    gateway 172.29.236.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for vxlan network
# ------------------------
# Used by all compute and network nodes
# The IP address on this device is Required
auto br-vxlan
iface br-vxlan inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports vxlan-veth2  # Notice the bridge port is the veth interface
    offload-sg off
    address 172.29.240.100
    netmask 255.255.252.0
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for management network
# -----------------------------
# Used by all nodes
# The IP address on this device is Required
auto br-mgmt
iface br-mgmt inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports mgmt-veth2  # Notice the bridge port is the veth interface
    offload-sg off
    address 172.29.236.100
    netmask 255.255.252.0
    gateway 172.29.236.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Bridge for storage network
# --------------------------
# Used by all compute and storage nodes
# The IP address on this device is Optional.
#  If no IP address is set change "static" to "manual"
auto br-storage
iface br-storage inet static
    bridge_stp off
    bridge_waitport 0
    bridge_fd 0
    bridge_ports storage-veth2  # Notice the bridge port is the veth interface
    offload-sg off
    address 172.29.244.100
    netmask 255.255.252.0
    gateway 172.29.244.1
    dns-nameservers 8.8.8.8 8.8.4.4


# Source other interface files that may be found
# ----------------------------------------------
source /etc/network/interfaces.d/*.cfg