Setup of Pseudowires over bi-directional LSP

Document Type Expired Internet-Draft (individual)
Author Wei Cao 
Last updated 2008-10-27
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In MPLS and MPLS-TE environments pseudo wires use two unidirectional LSPs as PSN tunnels, the two PEs select LSP tunnels independently. In contrast the MPLS-TP environment supports both bidirectional and unidirectional LSPs and PWE may, therefore, use bidirectional LSPs as PSN tunnels. In order to use MPLS-TP bidirectional LSPs as a PSN tunnels for pseudo wires some modification of the pseudowire signaling procedures is required. This draft specifies an extension to LDP that ensures pseudo-wires are correctly constructed over bi-directional LSPs. Conventions used in this document The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC-2119.


Wei Cao (

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