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    Viewing Performance Monitoring Details of OTN Ports for Detecting and Diagnosing Faults

    To analyze and resolve any faults associated with optical transport network (OTN) ports, it is essential to view the diagnostic data, warnings, and alarms for transport performance monitoring. The different types of parameters related to performance monitoring that are retrieved from the OTN ports enable you to ensure service availability and monitor the performance of individual services and the network.

    The performance monitoring capability of Connectivity Services Director helps you identify problems with the equipment, pinpoint security attacks, and analyze trends and categories of errors. This capability uses charts and grids to provide important and cohesive information about system conditions, discrepancies and malfunctioning, and protocols or components that need to be examined and debugged for better efficiency and working capacity. You can assess the performance of your network, not only at a point in time, but also over a period of time.

    To view performance monitoring details of OTN interfaces:

    1. From the Junos Space user interface, click the Build icon on the Connectivity Services Director banner.

      The workspaces that are applicable to Build mode are displayed on the Tasks pane.

    2. From the View selector, select Device View.

      The functionalities that you can configure in this view are displayed.

    3. From the Device View pane, click the plus sign (+) next to the My Network tree to expand the tree and select the device for which you want to define the optical port settings.

      The network tree is expanded and the selected device is highlighted.

    4. From the Tasks pane, select Device Management > View Physical Inventory.

      An image of the device is displayed on the right pane.

    5. In the image of the device, select an OTN interface or port—for example, a 100-Gigabit Ethernet optical transport network (OTN) MIC installed in a PTX Series router.

      The Optical Port dialog box is displayed. At the lower part of the dialog box, the OTU Section and ODU Section panes are displayed in a collapsed form.

    6. Click the Optical Port Section header at the bottom of the dialog box.

      The Optical Port Section pane is expanded and displayed. This pane contains the Equipment, Status/Config, and Performance tabs.

    7. Click the Performance tab at the bottom of the pane.

      This pane contains the Perf Mon and TCA Config tabs. The Perf Mon tab of the Optics PMs dialog box is displayed as shown in Figure 1. Only a portion of the fields displayed in the dialog box are illustrated in the figure.

      Figure 1: Perf Mon Tab of the Optics PMs Dialog Box

      Perf Mon Tab of the Optics PMs
Dialog Box

      The following fields are displayed in the Perf Mon tab of the Optics PMs dialog box. The date and time at which the dialog box was last refreshed is shown.

      • Carrier Frequency Offset (MHz)—Carrier frequency offset in megahertz (mHz), which denotes the difference between the carriers (frequency shift in the receive spectrum) between the expected Rx carrier frequency and the actual carrier frequency

        CFO—Threshold values for carrier frequency offset

        CFO-Min—Low threshold setting trigger when the carrier frequency offset falls below this minimum value

        CFO-Avg—Average threshold setting trigger when the carrier frequency offset crosses this average value

        CFO-Max—High threshold setting trigger when the carrier frequency offset rises above this maximum value

      • Chromatic Dispersion—Lane or residual chromatic dispersion measured at the Rx transceiver port, which denotes the spreading of the signal in time resulting from the different speeds of light rays

        CD—Threshold values for chromatic dispersion

        CD-Min—Minimum value of the residual chromatic dispersion measured at the Rx transceiver port

        CD-Avg—Average value of the residual chromatic dispersion measured at the Rx transceiver port

        CD-Max—Maximum value of the residual chromatic dispersion measured at the Rx transceiver port

      • Differential Group Delay—Lane differential group delay, which denotes the time difference between the fractions of a pulse that are transmitted in the two principal states of polarization of an optical signal. For distances greater than several kilometers, and assuming random (strong) polarization mode coupling, DGD in a fiber can be statistically modeled as having a Maxwellian distribution.

        DGD—Threshold values for differential group delay

        DGD-Min—Minimum value of the differential group delay below which a TC is triggered

        DGD-Avg—Average value of the differential group delay at which TCA is triggered

        DGD-Max—Maximum value of the differential group delay above which a TCA is triggered

      • Module Temperature (°C)—Module temperature, which denotes the laser temperature in Celsius

        MT—Threshold values for module temperature

        MT-Min—High laser temperature in Celsius below which a TCA is sent

        MT-Avg—Average laser temperature in Celsius at which a TCA is sent

        MT-Max—Maximum laser temperature in Celsius above which a TCA is sent

      • Optical Lane Q2 Factor—Quality (Q or Q2) factor value estimated at the Rx transceiver port

        Lane Q2 factor—Threshold values for the quality factor

        Lane Q2 factor-Min—Minimum value of the quality factor estimated at the Rx transceiver port below which a TCA is sent

        Lane Q2 factor-Avg—Average value of the quality factor estimated at the Rx transceiver port at which a TCA is sent

        Lane Q2 factor-Max—Maximum value of the quality factor estimated at the Rx transceiver port above which a TCA is sent

      • Signal to Noise Ratio—Signal-to-noise ratio estimated at the Rx transceiver port

        SNR—Threshold values for signal-to-noise ratio

        SNR-Min—Minimum value of the signal-to-noise ratio estimated at the Rx transceiver port below which a TCA is sent

        SNR-Avg—Average value of the signal-to-noise ratio estimated at the Rx transceiver port

        SNR-Max—Maximum value of the signal-to-noise ratio estimated at the Rx transceiver port above which a TCA is sent

      • Optical Tx Output Power—Transmitted laser optical output power in dBm

        Tx-Pwr—Threshold values for transmitted laser output power

        TxPwr-Min—Minimum value of the transmitted laser output power in dBm below which a TCA is sent

        TxPwr-Avg—Average value of the transmitted laser output power in dBM at which a TCA is sent

        TxPwr-Max—Maximum value of the transmitted laser output power above which a TCA is sent

      • Optical Rx Input Power—Received laser optical input power in dBm

        Rx-Pwr—Threshold values for received laser input power

        RxPwr-Min—Minimum value of the received laser input power in dBm below which a TCA is sent

        RxPwr-Avg—Average value of the received laser power in dBm at which a TCA is sent

        RxPwr-Max—Maximum value of the received input power in dBm above which a TCA is sent

      On the Perf Mon tab, for the TCA column, either a minus sign (–) is displayed that denotes that an alarm for threshold-exceed is not configured or a check mark is displayed and grayed out that indicates that the TCA for the particular attribute is configured.

    8. In the 15 Mins column, click the Chart button for the performance monitoring parameter set for which you want to view the statistics for the last 15 minutes. This option enables you to view the statistics in a chart form. Performance monitoring information for the different parameters are displayed for the current 15-minute interval. By default, 96 records of 15-minute intervals are displayed.

      A 15-Min parameter-name tab is displayed beside the TCA Config tab at the top-left corner of the Optics PMs dialog box. A graphical format of the statistics for the specified parameter is displayed on this tab.

    9. Click the 15 Mins parameter name tab.
      1. Select one of the following options from the drop-down menu:

        • Select View Chart or the graphical icon (elliptical curve symbol) to display the chart of performance monitoring statistical metrics. A line graph is displayed with date and time along the horizontal axis and the parameter along the vertical axis as shown in Figure 2. A color-coding format is used to display the different lines, and legends reference the parameter names corresponding to the lines displayed. Mouse over the points in the line graph to expand and show the value of the performance monitoring counters at a particular time.

          Figure 2: 15 Mins Parameter-Name Tab of the Optics PMs Dialog Box

          15 Mins Parameter-Name Tab
of the Optics PMs Dialog Box
        • Select View Grid to switch over to the tabular format of display of performance monitoring statistics.

          The records are displayed in tabular format. A serial number of the count of entries, the day, month, and year at which the entry was collected, and the time at which the entry was collected are displayed. The timestamp is the UTC time in the database that is mapped to the local time zone of the client computer.

        • Select Save Chart, when you view the performance monitoring statistics in graphical format, to save the graph to a Microsoft Excel file, as a .png image. Click the pin icon on the upper-left corner to revert the tab to the original container panel.

        • Select Popout Tab or the light blue triangle icon to view the dialog box as a separate window.

          In the pop-up dialog box, you can do one of the following:

          • In the From Date field, pull down the calendar and select the start date of the search. In the To Date field, pull down the calendar and select the end date of the search.

          • Click Reload to refresh the contents and display the updated information for the specified time period.

          • Click Export Data to transfer the data in graphical or statistical format to a spreadsheet or other business applications for future reference and archival. The comma-separated value (CSV) format takes the raw data from the report and delineates the fields with commas so that the data is imported into popular spreadsheet programs.

          • Click the View Chart button at the top-left corner of the dialog box to view the statistics in graphical format. Alternatively, click the View Grid button at the top-left corner of the dialog box to view the statistics in tabular format. The View Chart/Grid button is a toggle button.

          • Click OK to close the pop-up dialog box. Alternatively, press Esc to close the dialog box after you complete viewing the statistical details.

        • Click Close to close the 15-Min parameter-name tab.

    10. In the 24-Hrs column, click the Chart button for the performance monitoring parameter set for which you want to view the statistics for the previous day. This option enables you to view the statistics in a chart form. Performance monitoring information for the different parameters are displayed for the current 24-hour interval. By default, records pertaining to the last 30 days are displayed when you view the performance monitoring counters for the 24-hour duration.

      A 24 Hours parameter-name tab is displayed beside the TCA Config tab at the top-left corner of the Optics PMs dialog box as shown in Figure 3. A graphical format of the statistics for the specified parameter is displayed on this tab.

      Figure 3: 24 Hours Parameter-Name Tab of the Optics PMs Dialog Box

      24 Hours Parameter-Name Tab
of the Optics PMs Dialog Box
    11. Click the 24 Hours parameter name tab.
      1. Select one of the following options from the drop-down menu:

        • Select View Chart or the graphical icon (elliptical curve symbol) to display the chart of performance monitoring statistical metrics. A line graph is displayed with date along the horizontal axis and the parameter along the vertical axis. A color-coding format is used to display the different lines, and legends reference the parameter names corresponding to the lines displayed. Mouse over the points in the line graph to expand and show the value of the performance monitoring counters at a particular time.

        • Select View Grid to switch over to the tabular format of display of performance monitoring statistics.

        • Select Save Chart, when you view the performance monitoring statistics in graphical format, to save the graph to a Microsoft Excel file, as a .png image. Click the pin icon on the upper-left corner to revert the tab to the original container panel.

        • Select Popout Tab or the light blue triangle icon to view the dialog box as a separate window.

          In the pop-up dialog box, you can do one of the following:

          • In the From Date field, pull down the calendar and select the start date of the search. In the To Date field, pull down the calendar and select the end date of the search. Click Reload to refresh the contents and display the updated information for the specified time period.

          • Click Export Data to transfer the data in graphical or statistical format to a spreadsheet or other business applications for future reference and archival. The comma-separated value (CSV) format takes the raw data from the report and delineates the fields with commas so that the data is imported into popular spreadsheet programs.

          • Click the View Chart button at the top-left corner of the dialog box to view the statistics in graphical format. Alternatively, click the View Grid button at the top-left corner of the dialog box to view the statistics in tabular format. The View Chart/Grid button is a toggle button.

          • Click OK to close the pop-up dialog box. Alternatively, press Esc to close the dialog box after you complete viewing the statistical details.

        • Click Close to close the 24 Hours parameter-name tab.

    12. Click the Clear PMs button at the top of the Optics PMs dialog box, and select one of the following values from the drop-down menu to clear optics information from the transport performance monitoring data.
      • Current—Clear the optics information for the current interval, such as 15-minute interval or 24-hour interval, for which monitoring data is being collected.

      • Current Day—Clear the optics information for the current 24 hours.

      • All Intervals—Clear the optics information for the current 15-minute interval, the 96 records of 15-minute intervals, the current day, and the previous day

      After you select one of the intervals for which monitoring data must be deleted, a Clear Optics PMs dialog box is displayed to indicate that a job is triggered to delete the monitoring information from the module on the device. The job ID, start and end times of the job, percentage of completion, and status of the job are displayed.

    13. Click Close to close the job dialog box; alternatively, click Refresh to update the job status and view.

      You can use the Jobs Management page (by clicking the System icon on the banner and selecting Manage Jobs) to track the status of this job.

    You can click the Refresh (rotating arrow icon) button at the top of the Optics PMs dialog box to enable the latest performance monitoring statistics to be polled and displayed.

    Modified: 2017-09-13