This appendix details the optional RX Optical Transport Network (OTN) Interface port included in the integrated IP block. For more information on the soft TX OTN interface, see Soft TX OTN Interface.
The OTN interface provides an output from the RX Lane-aligner logic which outputs five lanes of 66b words. The words are aligned with the PCS alignment markers which are not removed but are also sent out through the interface. The outputs are also reordered such that the PCS lane 0 words will appear on the rx_otn_data_0 output and the PCS lane 1 words will be output on rx_otn_data_1, and so on.
The OTN interface is paired with a standard client monitoring block. This block gathers Ethernet MAC statistics for the OTN data for the RX path.
The OTN interface has the following features.
- Statistics as per the Integrated 100G Ethernet
- Separate RX OTN Interface for OTN framing applications
- 66b words per OTN lane
- Statistics available by either the broadside bus or the AXI4-Lite register interface