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    LCK

    Table 1: Alarm Details

    Parameter

    Description

    Code

    lck

    Description

    Locked, ODU: The local interface has received an ODU-LCK signal from the NE at the far end of the fiber, indicating that the connection at the transmitting interface is locked.

    Entities Affected

    OTN ODU interfaces (see respective table below).

    Possible Causes

    The transmitting OTN OTU interface at an upstream NE is either administratively disabled or in loopback mode.

    Default Severity

    Critical

    Service Affecting

    Yes (true).

    Alarm Clearing

    See Clearing an LCK alarm.

    Related Fault Hierarchy

    See OTN interface fault hierarchy.

    Table 2: OTN ODU Interfaces

    Entity Name

    Fault Indicator

    Module

    Indicator

    Status

    odu4:<chassis>/<slot>/2/1/<subport.och.tributary>

    UFM6

    Fault LED, 200-Gbps port, 400G Coherent MSA XCVR

    On

    odu2:<chassis>/<slot>/2/1/<subport.och.tributary.sub-interface>

    odu2e:<chassis>/<slot>/2/1/<subport.och.tributary.sub-interface>

    odu4:<chassis>/<slot>/1/1

    UFM4

    Fault LED, 100-Gbps port, 100G Coherent MSA XCVR

    odu4:<chassis>/<slot>/<subslot>/<port>

    1x CFP BIC

    Fault LED, 100-Gbps port

    odu2:<chassis>/<slot>/<subslot>/<port.sub-interface>

    odu2e:<chassis>/<slot>/<subslot>/<port.sub-interface>

    Note: Supported on UFM3 only.

    odu2:<chassis>/<slot>/<subslot>/<port>

    12x SFP+ BIC

    Fault LED, 10-Gbps port

    odu2e:<chassis>/<slot>/<subslot>/<port>

    Note: Supported on UFM3 only.

    Clearing an LCK Alarm

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

    1. Retrieve data for the transmitting OTU interface at the upstream NE to determine whether it is either administratively disabled ( Admin State = disabled ) or in loopback mode ( Loopback = loopback )
      show interface name:identifier
    2. Do one of the following, referring to the BTI7800 Series Software Configuration Guide for more information:
      • If the transmitting interface is administratively disabled, enable the interface.
      • If the transmitting interface is in loopback mode, release the loopback.
    3. 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.

    Modified: 2017-07-06