Configuring paths

You can specify path settings on an individual CPE device, on all devices that use the CPE template, or on all devices in a segment. Use the following instructions to configure paths:

Configuring paths on an individual CPE device.
To configure paths on an individual CPE device:
1. In the menu, go to the SD-WAN section.
  By default, the CPE subsection is displayed with a table of CPE devices.
2. Click the CPE device.
  The settings area is displayed in the lower part of the page. You can expand the settings area to fill the entire page by clicking the expand button .
3. Select the Multipathing tab.
  Path settings are displayed.
4. In the Maximum number of paths field, enter the maximum number of paths supported by the CPE device or segment. Range of values: 1 to 16. The default setting is 8.
5. In the Maximum of Auto-SPF field, enter the maximum number of Auto-SPF paths supported by the CPE device or segment. Paths of the Auto SPF type are automatically calculated by the SD-WAN Controller. Range of values: 1 to 8. The default setting is 2.
6. In the Cost variance multiplier field, enter the cost variance factor that determines how many times greater the cost of a route can be compared to the best route, to make the path eligible for being added to the segment. Range of values: 1.0 to 10.0.
  The default setting is 10. You cannot enter a value in this field if the Multi-weight balancing check box is selected.
7. If you need to distribute traffic among paths approximately in proportion to the value of the Path.weight attribute, select the Multi-weight balancing check box. When the check box is cleared, traffic is evenly spread and the weight attribute for all paths is 1. This check box is selected by default.
8. Click Apply.
Configuring paths on all devices that use a CPE template.
To configure paths on all devices that use a CPE template:
1. In the menu, go to the SD-WAN → CPE templates subsection.
  A table of CPE templates is displayed.
2. Click the CPE template.
  The settings area is displayed in the lower part of the page. You can expand the settings area to fill the entire page by clicking the expand button .
3. Select the Multipathing tab.
  Path settings are displayed.
4. In the Maximum number of paths field, enter the maximum number of paths supported by the CPE device or segment. Range of values: 1 to 16. The default setting is 8.
5. In the Maximum of Auto-SPF field, enter the maximum number of Auto-SPF paths supported by the CPE device or segment. Paths of the Auto SPF type are automatically calculated by the SD-WAN Controller. Range of values: 1 to 8. The default setting is 2.
6. In the Cost variance multiplier field, enter the cost variance factor that determines how many times greater the cost of a route can be compared to the best route, to make the path eligible for being added to the segment. Range of values: 1.0 to 10.0.
  The default setting is 10. You cannot enter a value in this field if the Multi-weight balancing check box is selected.
7. If you need to distribute traffic among paths approximately in proportion to the value of the Path.weight attribute, select the Multi-weight balancing check box. When the check box is cleared, traffic is evenly spread and the weight attribute for all paths is 1. This check box is selected by default.
8. In the upper part of the settings area, click Save to save the configuration of the CPE template.
Configuring paths on all devices in a segment.
To configure paths on all devices in a segment:
1. In the menu, go to the Infrastructure section.
  The SD-WAN infrastructure management page is displayed. By default, the Network resources tab is selected, which displays the table of SD-WAN Controllers.
2. Click Management next to the SD-WAN Controller and in the drop-down list, select Configuration menu.
  This opens the SD-WAN Controller configuration menu. By default, you are taken to the Controller nodes section, which displays a table of Controller nodes.
3. Go to the Segments section.
  A table of segments is displayed.
4. Click Management next to the segment and in the drop-down list, select Edit.
  This opens a window with path settings and a table of paths.
5. In the Maximum number of paths field, enter the maximum number of paths supported by the CPE device or segment. Range of values: 1 to 16. The default setting is 8.
6. In the Maximum of Auto-SPF field, enter the maximum number of Auto-SPF paths supported by the CPE device or segment. Paths of the Auto SPF type are automatically calculated by the SD-WAN Controller. Range of values: 1 to 8. The default setting is 2.
7. In the Cost variance multiplier field, enter the cost variance factor that determines how many times greater the cost of a route can be compared to the best route, to make the path eligible for being added to the segment. Range of values: 1.0 to 10.0.
  The default setting is 10. You cannot enter a value in this field if the Multi-weight balancing check box is selected.
8. If you need to distribute traffic among paths approximately in proportion to the value of the Path.weight attribute, select the Multi-weight balancing check box. When the check box is cleared, traffic is evenly spread and the weight attribute for all paths is 1. This check box is selected by default.
9. Click Save.