Managing threshold constraints

To display the table of threshold constraints, go to the Infrastructure menu section, click Management → Configuration menu next to the controller, go to the Constraints section, and select the Thresholds tab. Information about threshold constraints is displayed in the following columns of the table:

• Name is the name of the threshold constraint.
• Unsolicited indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the Unsolicited check box is selected in link monitoring settings:
  • Y
  • N
• Error level indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the errors-per-second threshold is reached on the link:
  • Y
  • N
• Utilization indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the utilization threshold is reached on the link, as a percentage of the bandwidth of the source service interface:
  • Y
  • N
• Latency indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the delay threshold (in milliseconds) is reached for traffic passing through the link:
  • Y
  • N
• Jitter indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the jitter threshold (in milliseconds) is reached for traffic passing through the link:
  • Y
  • N
• Packet loss indicates whether the threshold constraint excludes a link from Auto-TE path calculation if the packet loss threshold (as a percentage value) is reached on the link:
  • Y
  • N

  You can specify monitoring thresholds when configuring link monitoring.

Creating a threshold constraint

To create a threshold constraint:

1. In the menu, go to the Infrastructure section.

   This opens the resource management page. By default, the Network resources tab is selected, which displays the table of controllers.

2. Click Management → Configuration menu next to the controller.
3. Go to the Constraints section.

   The Manual-TE tab with the table of Manual-TE constraints is selected by default.

4. Select the Thresholds tab.

   A table of threshold constraints is displayed.

5. In the upper part of the page, click + Threshold constraint.
6. This opens a window; in that window, in the Name field, enter the name of the threshold constraint.
7. Select the Do not use tunnels with threshold reached check box next to link monitoring indicators to have the threshold constraint exclude links that have reached the threshold value of these monitoring indicators from the Auto-TE path calculation. This check box is cleared by default.
8. If you do not want the threshold constraint to exclude links with reached thresholds from Auto-TE path calculation when alternative links do not exist, select the Ignore if no constrained path is found check box next to the monitoring values. This check box is cleared by default. You can only select the check box next to monitoring values that have the Do not use tunnels with threshold reached check box selected.

   For example, if you have selected the Do not use tunnels with threshold reached check box next to the Error level monitoring value, the threshold constraint excludes a link on which the errors-per-second threshold is reached from Auto-TE path calculation. If you have also selected the Ignore if no constrained path is found check box and all links have reached the errors per second threshold, the threshold constraint does not exclude the link from the Auto-TE path calculation.

9. Click Create.

The threshold constraint is created and displayed in the table.

You can specify a threshold constraint when creating or editing a transport service to make the transport service use this threshold constraint.

Editing a threshold constraint

To edit a threshold constraint:

1. In the menu, go to the Infrastructure section.

   This opens the resource management page. By default, the Network resources tab is selected, which displays the table of controllers.

2. Click Management → Configuration menu next to the controller.
3. Go to the Constraints section.

   The Manual-TE tab with the table of Manual-TE constraints is selected by default.

4. Select the Thresholds tab.

   A table of threshold constraints is displayed.

5. Click Management → Edit next to the threshold constraint that you want to edit.
6. This opens a window; in that window, if necessary, edit the threshold constraint settings. For a description of the settings, see the instructions for creating a threshold constraint.
7. Click Save.

The threshold constraint is modified and updated in the table.

Deleting a threshold constraint

Deleted threshold constraints cannot be restored.

To delete a threshold constraint:

1. In the menu, go to the Infrastructure section.

   This opens the resource management page. By default, the Network resources tab is selected, which displays the table of controllers.

2. Click Management → Configuration menu next to the controller.
3. Go to the Constraints section.

   The Manual-TE tab with the table of Manual-TE constraints is selected by default.

4. Select the Thresholds tab.

   A table of threshold constraints is displayed.

5. Click Management → Delete next to the threshold constraint that you want to delete.
6. In the confirmation window, click Delete.

The threshold constraint is deleted and is no longer displayed in the table.