Translation(s): none


Please find alternative network setups for containers on the LXC mainpage.

In case of bridged or routed network provided by the host, here is an example.

Host device as bridge

# The primary network interface
#allow-hotplug eth0
#iface eth0 inet dhcp

auto br0
iface br0 inet dhcp
        bridge_ports eth0
        bridge_fd 0
        bridge_maxwait 0

# uncomment the below and comment the above for static ip setup on the host
#iface br0 inet static
#       bridge_ports eth0
#       bridge_fd 0
#       address <host IP here, e.g. 192.168.1.20>
#       netmask 255.255.255.0
#       network <network IP here, e.g. 192.168.1.0>
#       broadcast <broadcast IP here, e.g. 192.168.1.255>
#       gateway <gateway IP address here, e.g. 192.168.1.1>
#       # dns-* options are implemented by the resolvconf package, if installed
#       dns-nameservers <name server IP address here, e.g. 192.168.1.1>
#       dns-search your.search.domain.here

## Network
lxc.utsname = containershostname
lxc.network.type = veth
lxc.network.flags = up

# that's the interface defined above in host's interfaces file
lxc.network.link = br0

# name of network device inside the container,
# defaults to eth0, you could choose a name freely
lxc.network.name = lxcnet0 

lxc.network.hwaddr = 00:FF:AA:00:00:01

# the ip may be set to 0.0.0.0/24 or skip this line
# if you like to use a dhcp client inside the container
lxc.network.ipv4 = 192.168.1.110/24

auto lxcnet0
iface lxcnet0 inet dhcp
#iface lxcnet0 inet static
#       address <container IP here, e.g. 192.168.1.110>
#       all other settings like those for the host

Additonal bridge device instead of changing a host device to br0

# script to setup a natted network for lxc guests
CMD_BRCTL=/usr/sbin/brctl
CMD_IFCONFIG=/sbin/ifconfig
CMD_IPTABLES=/sbin/iptables
CMD_ROUTE=/sbin/route
NETWORK_BRIDGE_DEVICE_NAT=lxc-bridge-nat
HOST_NETDEVICE=wlan0
PRIVATE_GW_NAT=192.168.100.1
PRIVATE_NETMASK=255.255.255.0

${CMD_BRCTL} addbr ${NETWORK_BRIDGE_DEVICE_NAT}
${CMD_BRCTL} setfd ${NETWORK_BRIDGE_DEVICE_NAT} 0
${CMD_IFCONFIG} ${NETWORK_BRIDGE_DEVICE_NAT} ${PRIVATE_GW_NAT} netmask ${PRIVATE_NETMASK} promisc up
${CMD_IPTABLES} -t nat -A POSTROUTING -o ${HOST_NETDEVICE} -j MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward

lxc.network.link = lxc-bridge-nat
lxc.network.ipv4 = 192.168.100.10/24

References :