zr_fec_uncorrectable_frames_test

TRANSCEIVER-10: Telemetry: 400ZR Optics FEC(Forward Error Correction) Uncorrectable Frames Streaming.

Summary

Validate 400ZR optics module reports uncorrectable FEC frames count.

This observable represents the number of uncorrectable FEC frames, measured as RS(544,514) equivalent frames, in a short interval. This is a post-FEC decoder error metric.

Procedure

• Connect two ZR interfaces using a duplex LC fiber jumper such that TX output power of one is the RX input power of the other module.
• To establish a point to point ZR link ensure the following:
  • Both transceivers state is enabled
  • Both transceivers are set to a valid target TX output power example -10 dBm
  • Both transceivers are tuned to a valid centre frequency example 193.1 THz
• With the ZR link established as explained above, verify that the following ZR transceiver telemetry path exist and is streamed for both the ZR optics.
  • /terminal-device/logical-channels/channel/otn/state/fec-uncorrectable-blocks
• Verify that the reported data should be of type yang:counter64.
• When the modules or the devices are still in a boot stage, they must not stream any invalid string values like "nil" or "-inf".
• Toggle the interface state using /interfaces/interface/config/enabled and verify relevant FEC uncorrectable frame count is streamed. If there are no errors a value of 0 should be streamed for no FEC uncorrectable frames.

OpenConfig Path and RPC Coverage

paths:
    # Config Parameter coverage
    /interfaces/interface/config/enabled:
    /components/component/transceiver/config/enabled:
        platform_type: ["OPTICAL_CHANNEL"]
    # Telemetry Parameter coverage
    /terminal-device/logical-channels/channel/otn/state/fec-uncorrectable-blocks:

rpcs:
    gnmi:
        gNMI.Get:
        gNMI.Set:
        gNMI.Subscribe: