Supporting multiple IEC-101/IEC-104 masters on an IEC-101/IEC-104 translation gateway

摘要

In one embodiment, a network device, such as a router, receives a frame containing a message from a first terminal unit. The network device modifies the received frame by replacing an original value of an originator identifier field in the frame with a new value that is locally unique on a particular data link. The network device than forwards the modified frame to a selected second terminal unit selected from a plurality of terminal units.

主权项

1. A method, comprising:
receiving, at a network device, one or more frames from a plurality of terminal units in a network; in response to determining that a received frame from a first terminal unit does not contain any originator identifier field, adding an originator identifier field with a first original value to the received frame from the first terminal unit, the first originator value being unique on a particular data link connected to the network device; in response to determining that a received frame from a second terminal unit contains the originator identifier field with a second original value, modifying the received frame from the second terminal unit by replacing the second original value of the originator identifier field with a new value identified by the network device, the second original value placed in the originator identifier field by the second terminal unit to identify the second terminal unit; and forwarding a modified frame to a third terminal unit coupled to the network device via the particular data link.