Configuration Guide for Cisco Optical Site Manager, IOS XR Release 26.x.x

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Configuration Guide for Cisco Optical Site Manager, IOS XR Release 26.x.x

Optical degrees

Updated: October 14, 2026

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This section explains optical degrees in Cisco Optical Site Manager. From a topological point of view, all the units that are equipped in a node belong to a side.

From a topological point of view, all the units that are equipped in a node belong to a side. A side can be identified by a letter, or by the ports that are physically connected to the spans. A node can be connected to a maximum of 20 different spans. Each side identifies one of the spans to which the node is connected.

Manage optical degrees

Use this task to manage optical degrees.

Use this task to create, view, modify, or delete optical degrees in the node.

Before you begin

Follow these steps to manage optical degrees.

Procedure

  1. Click Optical Setup in the left panel.

  2. Click the Optical Configuration tab and then click Optical Degrees to expand it.

  3. Perform these steps, as needed.

    1. To create an optical degree, perform these steps:

      1. Click the + button.

        The Create Optical Degree dialog box appears.

      2. Select the Degree, Line In, and Line Out, values from their respective drop-down lists.

      3. (Optional) Enter a description in the Description field.

      4. Click Apply.

    2. To modify any one of the optical degree parameters described below degree, perform the following step as needed:

      • To modify the span validation of an optical degree, select a value from the drop-down list in the Span Validation column and click Apply.

      • Go to the related cell in the Channel Spacing column, select 50 or 100 from the drop-down list, and click Apply

      • Go to the related cell in the Spectrum Occupancy column, enter a valid value, and click Apply.

    3. To delete an optical degree, perform these steps:

      1. Check the check box corresponding to the optical degree you want to delete.

      2. Click the - button to delete the selected optical degree.

        A confirmation message appears.

      3. Click Yes.

        The optical degree is deleted from the table.

  4. (Optional) Click the Export to Excel button to export the information to an Excel sheet.

Note
You can only create a maximum of 20 optical degrees. The optical degree is created and added to the table that displays the following information.

  • Degree-Specifies the optical span of the side.

  • Description-Specifies the description as entered while creating the optical degree.

  • Line In-Specifies line in settings.

  • Line Out-Specifies line out settings.

  • Connected-to (IP/Degree)-Specifies the IP address and the optical degree of the remote Cisco Optical Site Manager instance that is connected on the other side of the span.

  • Span Validation-Specifies whether the span can be used by the GMPLS algorithm for channel routing and validation. Values are True or False.

  • Channel Grid-Specifies the type of grid. Values are Flexible-Grid or Fixed-Grid.

  • Channel Spacing-Specifies the minimum frequency spacing between two adjacent channels in the optical grid. Values are 100 or 50 GHz.

  • Spectrum Occupancy-Specifies a percentage of the spectral density (the ratio of the C-band used by the carrier versus the total bandwidth). The valid range is 50% to 91%.

  • Domain Type-Specifies the algorithm that is active on the span. By default, LOGO is displayed.