View source for Using bridges under NixOS

{{Delete|The related bug has been fixed and the contents of this page no longer apply to a modern NixOS, which uses systemd-networkd.}}

In order to use macvtap bridges in KVM, LXC, Xen or another hypervisor on NixOS, you have to configure your DHCP server to not assign an IP address to that interface.

By default, the DHCP server on NixOS configures every interface with an IP.

== Configuration ==

If you are running <code>dhcpcd</code>, then you have to define a <code>denyInterfaces</code> parameter:
{{file|configuration.nix|nix|
<nowiki>
{
  networking.dhcpcd.denyInterfaces = [ "macvtap0@*" ];
}
</nowiki>
}}
{{Evaluate}}


Issue {{issue|67966}} is relevant for DHCP and bridging.

[[Category:Virtualization]]