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Supported LDP Standards

Junos OS substantially supports the following RFCs and Internet drafts, which define standards for LDP.

  • RFC 3212, Constraint-Based LSP Setup using LDP

  • RFC 3478, Graceful Restart Mechanism for Label Distribution Protocol

  • RFC 7060, Using LDP Multipoint Extensions on Targeted LDP Sessions

  • RFC 8661, Segment Routing MPLS Interworking with LDP

  • RFC 8077, Pseudowire Setup and Maintenance Using the Label Distribution Protocol (LDP)

  • Internet draft draft-napierala-mpls-targeted-mldp-01.txt, Using LDP Multipoint Extensions on Targeted LDP Sessions

The following RFCs do not define standards, but provide information about LDP. The IETF classifies them as “Informational.”

  • RFC 3215, LDP State Machine

  • RFC 5036, LDP Specification

    For the following features described in the indicated sections of the RFC, Junos OS supports one of the possible modes but not the others:

    • Label distribution control (section 2.6.1): Ordered mode is supported, but not Independent mode.

    • Label retention (section 2.6.2): Liberal mode is supported, but not Conservative mode.

    • Label advertisement (section 2.6.3): Both Downstream Unsolicited mode and Downstream on Demand mode are supported.

  • RFC 5283, LDP Extension for Inter-Area Label Switched Paths (LSPs)

  • RFC 5443, LDP IGP Synchronization

  • RFC 5561, LDP Capabilities

  • RFC 6826, Multipoint LDP In-Band Signaling for Point-to-Multipoint and Multipoint-to-Multipoint Label Switched Paths

    Junos OS support limited to point-to-multipoint extensions for LDP.