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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

odu3:<chassis>/<slot>/2/1/<subport.och.tributary.sub-interface>

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.