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Lolck

 

Table 1: Alarm Details

Parameter

Description

Code

lolck

Description

Loss of Lock: The optical channel cannot lock on to the encoded signal received.

Entities Affected

Optical channel interfaces (see respective table below).

Possible Causes

  • The encoding, modulation, or other configured parameter on the interface at the far-end NE does not match the configuration of the same parameter of the interface at the local NE.

  • The signal-to-noise ratio is below specification.

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See Clearing a Lolck alarm.

Related Fault Hierarchy

See Common fault hierarchy - OTN and CBR ports.

Table 2: Optical Channel Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

och:<chassis>/<slot>/<2>/<1>/<subport.och>

UFM6

Fault LED, 200G line port

On

Clearing a Lolck Alarm

Note

Follow all applicable safety requirements as described in the BTI7800 Series Hardware Overview and Installation Guide.

  1. Retrieve information for both the local and far-end optical channel interfaces to view configuration data:
    show interface och:identifier detail
  2. Correct the configuration settings where required. For information, see the BTI7800 Series Software Configuration Guide.
  3. Retrieve statistics for the local and far-end optical channel interfaces to view the values of all optical signal-to-noise ratio counters, and ensure that the OSNR is within specification.
    show statistics current och:identifier
  4. If required, improve the signal-to-noise ratio.
  5. Check for alarms on the local interface.
    • If the alarm clears, you have completed this procedure.

    • If the alarm does not clear, contact your next level of support.