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Methods and apparatuses for improved Ethernet path selection using optical levels

  • US 9,270,368 B2
  • Filed: 10/02/2013
  • Issued: 02/23/2016
  • Est. Priority Date: 03/14/2013
  • Status: Active Grant
First Claim
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1. A method of enhanced monitoring for optical signal level degradation comprising:

  • obtaining at least one diagnostic level from a small form-factor pluggable (SFP) transceiver connected to an optical path, the diagnostic level comprising at least a SFP loss of signal (LOS) assertion level of the SFP transceiver that is designated by a SFP transceiver manufacturer and corresponds to a signal level on the optical path at which the SFP transceiver asserts a LOS indication to a host network equipment (NE) device to which the SFP transceiver is connected;

    determining at least one parameter corresponding to a low receive level threshold for an optical path, the low receive level threshold having a value that is above the SFP LOS assertion level by a designated amount;

    receiving a Receive (Rx) level for the optical path from the transceiver;

    determining if the received Rx level satisfies the low receive level threshold;

    generating an enhanced LOS (ELOS) indication when the received Rx level reaches the low receive level threshold; and

    asserting a LOS for the host NE device when the generation of the ELOS indication occurs, and asserting a LOS for the host NE device when the SFP transceiver asserts a LOS indication in response to detecting the Rx level at the SFP LOS assertion level.

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