- sw_if_index = Topology.convert_interface_reference(
- node, interface, "sw_if_index")
+ try:
+ sw_if_index = Topology.convert_interface_reference(
+ node, interface, "sw_if_index")
+ except RuntimeError:
+ if isinstance(interface, basestring):
+ sw_if_index = InterfaceUtil.get_sw_if_index(node, interface)
+ else:
+ raise