Juniper Networks® Field Guide and Reference

Configuring Miscellaneous MPLS Properties

This section discusses additional MPLS properties that are not directly related to creating LSPs.

Popping the Label on the Ultimate-Hop Router

You can control the label value advertised on the egress router of an LSP. The default advertised label is label 3 (implicit null label). If label 3 is advertised, the penultimate-hop router removes the label and sends the packet to the egress router. By enabling ultimate-hop popping, label 0 (IPv4 Explicit Null Label) is advertised. Ultimate hop-popping ensures that any packets traversing an MPLS network include a label.

To configure MPLS to pop the label on the ultimate hop, include the explicit-null statement:

[edit protocols ldp] 
explicit-null;

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