Two OptiX PTN 3900 NEs, that is, NE01 and NE02, are interconnected through the optical ports on the EFG2 boards on the two NEs. The fiber links are normal and no service is configured between the two NEs. The EFG2 interface board works with the EG16 processing board.
In-band DCN communication between the two NEs, however, fails. The ping operation from one NE to the opposite NE fails. If other ports on the EFG2 boards of the two NEs are used for interconnection, the fault certainly occurs.
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