MPLS Label Stack Encoding

Rosen, Eric; Tappan, Daniel C.; Fedorkow, Guy; Rekhter, Yakov; Farinacci, Dino; Li, T.; Conta, A.

doi:10.17487/rfc3032

Cited by 207 publications

(154 citation statements)

References 5 publications

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“…The special-purpose label value of 3 (the "Implicit NULL Label" [RFC3032]) is only used in signaling, never in the data plane.…”

Section: Questionsmentioning

confidence: 99%

Allocating and Retiring Special-Purpose MPLS Labels

Kompella¹,

Farrel²,

Andersson³

2014

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Some MPLS labels have been allocated for specific purposes. A block of labels (0-15) has been set aside to this end; these labels are commonly called "reserved labels". They will be called "specialpurpose labels" in this document.As there are only 16 of these special-purpose labels, caution is needed in the allocation of new special-purpose labels; yet, at the same time, forward progress should be allowed when one is called for.This memo defines new procedures for the allocation and retirement of special-purpose labels, as well as a method to extend the specialpurpose label space and a description of how to handle extended special-purpose labels in the data plane. Finally, this memo renames the IANA registry for special-purpose labels to "Special-Purpose MPLS Label Values" and creates a new registry called the "Extended Special-Purpose MPLS Label Values" registry.

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“…The special-purpose label value of 3 (the "Implicit NULL Label" [RFC3032]) is only used in signaling, never in the data plane.…”

Section: Questionsmentioning

confidence: 99%

Allocating and Retiring Special-Purpose MPLS Labels

Kompella¹,

Farrel²,

Andersson³

2014

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“…If the numerical value L of the upstream-assigned label is the value 3, defined in [LDP] and [RFC3032] as "Implicit NULL", then the specified multicast tunnel will carry only the specified MP-LSP. That is, aggregation of multiple MP-LSPs into a single multicast tunnel is not being done.…”

Section: Targeted Mldp With Multicast Tunnelingmentioning

confidence: 99%

Using LDP Multipoint Extensions on Targeted LDP Sessions

Napierala¹,

Wijnands²,

Rosen³

2013

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Label Distribution Protocol (LDP) can be used to set up Point-toMultipoint (P2MP) and Multipoint-to-Multipoint (MP2MP) Label Switched Paths. However, the specification for the Multipoint Extensions to LDP presupposes that the two endpoints of an LDP session are directly connected. The LDP base specification allows for the case where the two endpoints of an LDP session are not directly connected; such a session is known as a "Targeted LDP" session. This document provides the specification for using the LDP Multipoint Extensions over a Targeted LDP session.

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“…The MPLS encapsulation is specified in [RFC3032]. All MPLS labels used in the server layer (Figure 1) MUST be statically provisioned.…”

Section: External Configurationmentioning

confidence: 99%