diff --git a/RNS/Interfaces/Interface.py b/RNS/Interfaces/Interface.py
index 05c5e62..f6c9dd2 100755
--- a/RNS/Interfaces/Interface.py
+++ b/RNS/Interfaces/Interface.py
@@ -31,11 +31,17 @@ class Interface:
     RPT = False
     name = None
 
+    # Interface mode definitions
     MODE_FULL           = 0x01
     MODE_POINT_TO_POINT = 0x02
     MODE_ACCESS_POINT   = 0x03
     MODE_ROAMING        = 0x04
     MODE_BOUNDARY       = 0x05
+    MODE_GATEWAY        = 0x06
+
+    # Which interface modes a Transport Node
+    # must act as path request agent for.
+    PATH_REQUEST_AGENT_FOR = [MODE_ACCESS_POINT, MODE_GATEWAY]
 
     def __init__(self):
         self.rxb = 0
diff --git a/RNS/Reticulum.py b/RNS/Reticulum.py
index c0a7ef6..adc5db1 100755
--- a/RNS/Reticulum.py
+++ b/RNS/Reticulum.py
@@ -354,6 +354,8 @@ class Reticulum:
                             interface_mode = Interface.Interface.MODE_ROAMING
                         elif c["interface_mode"] == "boundary":
                             interface_mode = Interface.Interface.MODE_BOUNDARY
+                        elif c["mode"] == "gateway" or c["mode"] == "gw":
+                            interface_mode = Interface.Interface.MODE_GATEWAY
 
                     elif "mode" in c:
                         c["mode"] = str(c["mode"]).lower()
@@ -367,6 +369,8 @@ class Reticulum:
                             interface_mode = Interface.Interface.MODE_ROAMING
                         elif c["mode"] == "boundary":
                             interface_mode = Interface.Interface.MODE_BOUNDARY
+                        elif c["mode"] == "gateway" or c["mode"] == "gw":
+                            interface_mode = Interface.Interface.MODE_GATEWAY
 
                     ifac_size = None
                     if "ifac_size" in c: