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-rw-r--r--nixos/modules/tasks/network-interfaces-systemd.nix2
1 files changed, 2 insertions, 0 deletions
diff --git a/nixos/modules/tasks/network-interfaces-systemd.nix b/nixos/modules/tasks/network-interfaces-systemd.nix
index 8a5e1b5af114c..8654539b6629c 100644
--- a/nixos/modules/tasks/network-interfaces-systemd.nix
+++ b/nixos/modules/tasks/network-interfaces-systemd.nix
@@ -318,6 +318,8 @@ in
               Remote = gre.remote;
             }) // (optionalAttrs (gre.local != null) {
               Local = gre.local;
+            }) // (optionalAttrs (gre.ttl != null) {
+              TTL = gre.ttl;
             });
         };
         networks = mkIf (gre.dev != null) {