Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    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.

    Modified: 2017-07-06