bugfix in ns3 metadata

diff --git a/src/nepi/testbeds/ns3/connection_metadata_v3_9.py b/src/nepi/testbeds/ns3/connection_metadata_v3_9.py
index aa16b6e..d1392c4 100644 (file)
--- a/src/nepi/testbeds/ns3/connection_metadata_v3_9.py
+++ b/src/nepi/testbeds/ns3/connection_metadata_v3_9.py
@@ -30,7 +30,7 @@ def connect_manager_device(testbed_instance, manager_guid, device_guid):
 
 def connect_phy_device(testbed_instance, phy_guid, device_guid):
     phy = testbed_instance._elements[phy_guid]
-    if phy.GetErrorRateModel() == None:
+    if hasattr(phy, "GetErrorRateModel") and phy.GetErrorRateModel() == None:
         return CONNECTION_DELAY
     device = testbed_instance._elements[device_guid]
     device.SetPhy(phy)