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EtherNet/IP Interoperability Conformance Test Specification Revision 1.5.1, Devices with Multiple Interfaces: Test case 4.4.1.1.4 rquires either "00 00" or a padded EPATH to an instance of the Ethernet Link Object which represents an internal interface. Current firmware reports "20 F6 24 01", ie. path to the Ethernet Link object representing the external Port 1. As we don't have a third instance for an internal interface, we shall report "00 00" instead.