Bridged veth

Bridged veth is a network interface given to a container which is linked to some other network interface on the host. osctld expects DHCP server to be running on the linked interface, so that containers are assigned IP addresses dynamically.

Virtual machines run with make qemu have lxcbr0 preconfigured. To enable lxcbr0 in other configurations, set option networking.lxcbr = true;, e.g. in your config/local.nix.

To create a bridged veth, use:

osctl ct netif new bridge --link lxcbr0 myct01 eth0

Static addresses

If you wish to assign static IP addresses, you can set static MAC addresses for container interfaces and use a MAC filter in the DHCP server. Another option is to disable DHCP altogether and configure the interface statically.

To create an interface without DHCP, use the --no-dhcp switch:

osctl ct netif new bridge --link lxcbr0 --no-dhcp myct01 eth0

DHCP can also be toggled on an already existing interface:

osctl ct netif set --enable-dhcp|--disable-dhcp myct01 eth0

When DHCP is disabled, you can manage IP addresses statically using osctl ct netif ip commands.

The container's gateway defaults to the primary address of the linked interface. It can be changed using options --gateway-v4 and --gateway-v6 for commands osctl ct netif new bridge and osctl ct netif set. Possible values are auto, none and a custom IP address.