Backup Path Configuration Options

The Backup Path Config Options are provided to design a tunnel’s primary and backup paths. To create backup paths, select “Add if not existing” for the Backup Path #1 and/or Backup Path #2.

Note that it is not required to design for both backup paths. To avoid creating new backup paths, select the option “Change only existing backup” for Backup Path #1 and/or Backup Path #2. If the backup path does not exist, no action will be taken.

Note also that backup paths cannot be removed from this window. To remove existing backup paths, use the Tuning window option instead, Modify > Selected Paths, and set Max # Backup Paths to 0.

To avoid changing current backup path types (Standby vs. Secondary), select the option “Preserve standby/secondary settings of existing tunnels”. In this case, the backup path type settings specified will only be used when adding backup paths and not for existing backup paths. If instead you unselect “Preserve the type of existing diverse paths”, this option will be used to change the backup path type not only of the added backup paths but also of the already existing tunnel paths.

See the examples below on some common path design scenarios:

Dynamic Primary Path

Use the following settings to configure only a dynamic primary path:

• Primary Path: “Dynamic”

• Backup Path #1 and Backup Path #2: Select “Change only existing backup” to avoid creating a backup path

  Note:

  Existing backup paths cannot be removed from this window. To remove existing backup paths, use the Modify > Selected Paths and set Max # Backup Paths to 0.

Explicit Primary Path with Dynamic Secondary Path

Use the following settings to configure an explicit (nailed down) primary path with a dynamic secondary backup path:

• Primary Path: “Explicit”

• Backup Path #1: “Dynamic” “Secondary” “Add if missing”

• Backup Path #2: “Change only existing backup” to avoid creating a tertiary path

  Note:

  Existing backup paths cannot be removed from this window. To remove existing backup paths, use the Modify > Selected Paths and set Max # Backup Paths to 0.

Explicit Primary and Explicit Standby Path

Use the following settings to configure an explicit primary and explicit standby backup path:

• Primary Path: “Explicit”

• Backup Path #1: “Explicit” “Standby” “Add if missing”

• Backup Path #2: “Change only existing backup” to avoid creating a tertiary path

  Note:

  Existing backup paths cannot be removed from this window. To remove existing backup paths, use the Modify > Selected Paths and set Max # Backup Paths to 0.

Explicit Primary and Explicit Standby Path with Dynamic Tertiary Path

Use the following settings to configure an explicit primary and standby backup path and dynamic tertiary path.

• Primary Path: “Explicit”

• Backup Path #1: “Explicit” “Standby” “Add if missing”

• Backup Path #2: “Dynamic” “Secondary” “Add if missing”