diff --git a/nix/nixos-module/container/upstream/pppoe.nix b/nix/nixos-module/container/upstream/pppoe.nix
index b3af6e4..f304679 100644
--- a/nix/nixos-module/container/upstream/pppoe.nix
+++ b/nix/nixos-module/container/upstream/pppoe.nix
@@ -64,6 +64,11 @@ in lib.mkIf (pppoeInterfaces != {}) {
     in networks // {
       "${ifName}" = {
         matchConfig.Name = "${ifName}";
+        linkConfig = lib.optionalAttrs (ifName == "core") {
+          # interface is stuck in "routable (configuring)" and blocks systemd-networkd-wait-online
+          # TODO: figure out why exactly
+          RequiredForOnline = false;
+        };
         networkConfig = {
           DHCP = lib.mkForce "ipv6";
           # accept config set by pppd