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SD

 

Table 1: Alarm Details

Parameter

Description

Code

sd

Description

Signal Degrade: The local port is in a signal-degrade state because of a number of errors in the received signal.

Entities Affected

  • OTN OTU interfaces (see respective table below).

  • SONET/SDH interfaces (see respective table below).

Possible Causes

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

  • Excessive signal attenuation has resulted in a high signal-to-noise ratio.

Default Severity

Minor

Service Affecting

No (false).

Alarm Clearing

See Clearing an SD alarm.

Related Fault Hierarchy

See:

Table 2: OTN OTU Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

otu4:<chassis>/<slot>/<2>/<1>/<subport.och.tributary>

UFM6

Fault LED, 200G line port

On

otu4:<chassis>/<slot>/<1>/<1>

UFM4

Fault LED, 100G line port

On

otu4:<chassis>/<slot>/<subslot>/<port>

1x CFP BIC

Fault LED, 100G port

otu2:<chassis>/<slot>/<subslot>/<port>

12x SFP+ BIC

Fault LED, 10G port

otu2e:<chassis>/<slot>/<subslot>/<port>

Note: Supported on UFM3 only.

Table 3: SONET/SDH Interfaces

Entity Name

 

Fault Indicator

Module

Indicator

Status

oc192:<chassis>/<slot>/<subslot>/<port>

12x SFP+ BIC

Fault LED, 10G port

On

wanoc192:<chassis>/<slot>/<subslot>/<port>

stm64:<chassis>/<slot>/<subslot>/<port>

wanstm64:<chassis>/<slot>/<subslot>/<port>

Clearing an SD Alarm

Note

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

  1. Reprieve statistics for the interface, and ensure that the optical power received and the optical signal-to-noise ratio are within specification:
    show statistics current name:identifier
  2. Inspect the fiber connection, and ensure that the fiber is intact, thoroughly clean, and correctly connected to the port.
  3. Check for alarms on the interface.
    • If the alarm clears, you have completed this procedure.

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