diff --git a/junos/protocols.nix b/junos/protocols.nix
new file mode 100644
index 0000000..334d6d5
--- /dev/null
+++ b/junos/protocols.nix
@@ -0,0 +1,23 @@
+{ lib, config, ... }:
+with lib;
+{
+  options = {
+    protocols.rstp = mkOption { type = types.listOf types.str; };
+    netconf.xmls.protocols = mkOption {
+      type = types.str;
+      visible = false;
+      readOnly = true;
+    };
+  };
+  config.netconf.xmls.protocols =
+    let
+      rstps = map (intf: "<interface><name>${intf}</name></interface>") config.protocols.rstp;
+    in
+    ''
+      <protocols>
+        <rstp operation="replace">
+          ${concatStringsSep "" rstps}
+        </rstp>
+      </protocols>
+    '';
+}