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Add and Remove LSP Delegation

You can use the Configure LSP Delegation page (Network > Toplogy > Tunnel tab > Delegation > Configure Delegation) to delegate the management of Path Computation Client-controlled label-switched paths (PCC-controlled LSPs) to the Path Computation Element (PCE). After delegation, these LSPs are managed by the PCE and are classified as PCC-delegated LSPs. You can also return the control of these LSPs to the PCC by removing the delegation, and these LSPs are then re-classified as PCC-controlled LSPs.

Add LSP Delegation

To delegate one or more LSPs to the PCE:

Note:

For LSPs that were manually created by using the CLI of IOS-XR devices, you must run device collection before doing any LSP delegation. See Add a Device Collection Task.

  1. From the Add Delegation tab, select the LSPs that you want to delegate to the PCE.

    To select all the available LSPs for delegation, click the check-box beside the Name column.

  2. Click Delegate LSP.

    A confirmation message appears on the top of the page indicating that the LSP delegation was requested.

    The lsp-external-controller pccd statement is added to the router configuration and the LSPs are delegated to the PCE.

    The Control Type column in the Tunnel tab (Topology > Tunnel) of the network information table displays Delegated for the selected LSPs.

    Note:

    • If there is a failure along the path, the PCE reroutes the delegated LSPs (RSVP LSPs and SR LSPs with a single primary path) around the failed network element.

    • When the PCE doesn’t find a path for the delegated SR LSP, the PCE sends a PCEP message to the PCC with an empty explicit route object (ERO). The PCC then sets the LSP's operational status as Down and sends a PCEP message to the PCE indicating that the LSP's operational status is Down. Later, when the PCE computes a path for the LSP, the PCE sends a PCEP message to the PCC, with the ERO. The PCC then provisions the ERO and sends a PCEP message to the PCE indicating that the LSP's operational status is now Up.

      The empty ERO feature for delegated SR LSPs and delegated RSVP LSPs is supported only for Juniper Networks PCC devices and this feature has not been tested with other PCC devices. For delegated SR LSPs, this feature is supported only on Juniper Networks PCC devices running Junos OS Release 20.4R1 or later.

Remove LSP Delegation

Note:

Undelegating LSPs from the PCE is not the same as the temporary removal you achieve when you right-click a tunnel in the Tunnel tab of the network information table and select Return Delegation to PCC. In that case, control is temporarily returned to the PCC for a period of time based on the router’s timer statement.

To undelegate one or more LSPs from the PCE:

  1. From the Remove Delegation tab, select the LSPs that you want to undelegate.

    To select all the available LSPs for undelegation, click the check-box beside the Name column.

  2. Click Undelegate LSP.

    A confirmation message appears on the top of the page indicating that the LSP delegation change was requested.

    The delegation statement is removed from the router configuration and the control of these LSPs is returned to the PCC.

    The Control Type column in the Tunnel tab (Topology > Tunnel) of the network information table displays Device Controlled for the selected LSPs.

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