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LoSync

 

Table 1: Alarm Details

Parameter

Description

Code

loSync

Description

Loss of Synchronization: The signal received on the local interface is sufficiently degraded that it cannot be synchronized.

Entities Affected

  • Ethernet interfaces

  • Fibre Channel interfaces

See respective tables below.

Possible Causes

  • Either the fiber link or the optical connection is severely degraded.

  • The far-end optical transmitter is faulty.

Default Severity

Critical

Service Affecting

Yes (true).

Alarm Clearing

See Clearing a LoSync alarm.

Related Fault Hierarchy

See Ethernet interface fault hierarchy and Fibre Channel Interface Fault Hierarchy.

Table 2: Ethernet Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

100ge:<chassis>/<slot>/<subslot>/<port>/<subport>

1x CFP BIC

Fault LED, 100G port

On

100ge:<chassis>/<slot>/<1>/<port>

UFM6

Fault LED, 10/40/100G port

40ge:<chassis>/<slot>/<1>/<port>

UFM6

Fault LED, 10/40/100G port

10ge:<chassis>/<slot>/<1>/<port>/<subport>

UFM6

Fault LED, 10/40/100G port

10ge:<chassis>/<slot>/<subslot>/<port>/<subport>

12x SFP+ BIC

Fault LED, 10G port

Table 3: Fibre Channel Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

8gfc:<chassis>/<slot>/1/<port>/subport

UFM6

Fault LED, 10-Gbps port

On

10gfc:<chassis>/<slot>/1/<port>/subport

UFM6

Fault LED, 10-Gbps port

On

Clearing a LoSync Alarm

Note

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

  1. Retrieve detailed information for the interface, and ensure that the value of the Optical Power Rx counter is within the range indicated by the Optical Power Received Minimum Threshold and Optical Power Received Maximum Threshold values.
    show interface name:identifier detail
  2. Inspect the fiber connection, and ensure that the fiber is intact, thoroughly clean, and correctly connected to the port.
  3. Check for and clear alarms on the far-end optical transmitter.
  4. Check for alarms on the local interface.
    • If the alarm has cleared, you have completed this procedure.

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